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Publisher: Elsevier   (Total: 3043 journals)

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Showing 1 - 200 of 3043 Journals sorted alphabetically
AASRI Procedia     Open Access   (Followers: 15)
Academic Pediatrics     Hybrid Journal   (Followers: 20, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 18, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 83, SJR: 1.109, h-index: 94)
Accounting Forum     Hybrid Journal   (Followers: 23, SJR: 0.612, h-index: 27)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 27, SJR: 2.515, h-index: 90)
Achievements in the Life Sciences     Open Access   (Followers: 4)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 5, SJR: 0.338, h-index: 19)
Acta Astronautica     Hybrid Journal   (Followers: 332, SJR: 0.726, h-index: 43)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 3)
Acta Biomaterialia     Hybrid Journal   (Followers: 25, SJR: 2.02, h-index: 104)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription   (Followers: 1)
Acta de Investigación Psicológica     Open Access   (Followers: 2)
Acta Ecologica Sinica     Open Access   (Followers: 8, SJR: 0.172, h-index: 29)
Acta Haematologica Polonica     Free   (SJR: 0.123, h-index: 8)
Acta Histochemica     Hybrid Journal   (Followers: 3, SJR: 0.604, h-index: 38)
Acta Materialia     Hybrid Journal   (Followers: 211, SJR: 3.683, h-index: 202)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.615, h-index: 21)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.442, h-index: 21)
Acta Oecologica     Hybrid Journal   (Followers: 9, SJR: 0.915, h-index: 53)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription   (Followers: 1)
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 3, SJR: 0.311, h-index: 16)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 2)
Acta Poética     Open Access   (Followers: 4)
Acta Psychologica     Hybrid Journal   (Followers: 23, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 6, SJR: 1.059, h-index: 77)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 4)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 3)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 4, SJR: 0.383, h-index: 19)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 2)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 5, SJR: 0.141, h-index: 3)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 4, SJR: 0.112, h-index: 2)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 3)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.967, h-index: 57)
Addictive Behaviors     Hybrid Journal   (Followers: 15, SJR: 1.514, h-index: 92)
Addictive Behaviors Reports     Open Access   (Followers: 5)
Additive Manufacturing     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 129, SJR: 5.2, h-index: 222)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 11, SJR: 1.265, h-index: 53)
Advanced Powder Technology     Hybrid Journal   (Followers: 16, SJR: 0.739, h-index: 33)
Advances in Accounting     Hybrid Journal   (Followers: 9, SJR: 0.299, h-index: 15)
Advances in Agronomy     Full-text available via subscription   (Followers: 15, SJR: 2.071, h-index: 82)
Advances in Anesthesia     Full-text available via subscription   (Followers: 25, SJR: 0.169, h-index: 4)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 3)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 6, SJR: 1.054, h-index: 35)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 10, SJR: 0.801, h-index: 26)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 22, SJR: 1.286, h-index: 49)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 16, SJR: 3.31, h-index: 42)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.277, h-index: 43)
Advances in Botanical Research     Full-text available via subscription   (Followers: 3, SJR: 0.619, h-index: 48)
Advances in Cancer Research     Full-text available via subscription   (Followers: 25, SJR: 2.215, h-index: 78)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 9, SJR: 0.9, h-index: 30)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 2.139, h-index: 42)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24, SJR: 0.183, h-index: 23)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 10, SJR: 0.665, h-index: 29)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 10, SJR: 1.268, h-index: 45)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 28, SJR: 0.938, h-index: 33)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18, SJR: 2.314, h-index: 130)
Advances in Computers     Full-text available via subscription   (Followers: 16, SJR: 0.223, h-index: 22)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in Digestive Medicine     Open Access   (Followers: 4)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Ecological Research     Full-text available via subscription   (Followers: 41, SJR: 3.25, h-index: 43)
Advances in Engineering Software     Hybrid Journal   (Followers: 25, SJR: 0.486, h-index: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 40, SJR: 5.465, h-index: 64)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 47, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
Advances in Genetics     Full-text available via subscription   (Followers: 15, SJR: 2.558, h-index: 54)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in Geophysics     Full-text available via subscription   (Followers: 6, SJR: 2.325, h-index: 20)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21, SJR: 0.906, h-index: 24)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 0.497, h-index: 31)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 25)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2, SJR: 0.396, h-index: 27)
Advances in Immunology     Full-text available via subscription   (Followers: 35, SJR: 4.152, h-index: 85)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 1.132, h-index: 42)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 3, SJR: 1.274, h-index: 27)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 5)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 4)
Advances in Life Course Research     Hybrid Journal   (Followers: 8, SJR: 0.764, h-index: 15)
Advances in Lipobiology     Full-text available via subscription   (Followers: 2)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16, SJR: 1.645, h-index: 45)
Advances in Mathematics     Full-text available via subscription   (Followers: 10, SJR: 3.261, h-index: 65)
Advances in Medical Sciences     Hybrid Journal   (Followers: 6, SJR: 0.489, h-index: 25)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 4, SJR: 1.44, h-index: 51)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 22)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 10)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 7, SJR: 0.324, h-index: 8)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 4)
Advances in Oncobiology     Full-text available via subscription   (Followers: 3)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15, SJR: 2.885, h-index: 45)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7, SJR: 0.148, h-index: 11)
Advances in Parasitology     Full-text available via subscription   (Followers: 7, SJR: 2.37, h-index: 73)
Advances in Pediatrics     Full-text available via subscription   (Followers: 24, SJR: 0.4, h-index: 28)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 13)
Advances in Pharmacology     Full-text available via subscription   (Followers: 15, SJR: 1.718, h-index: 58)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 7, SJR: 0.384, h-index: 26)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.248, h-index: 11)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 8)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 5)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 19, SJR: 1.5, h-index: 62)
Advances in Psychology     Full-text available via subscription   (Followers: 60)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5, SJR: 0.478, h-index: 32)
Advances in Radiation Oncology     Open Access  
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 2, SJR: 0.1, h-index: 2)
Advances in Space Research     Full-text available via subscription   (Followers: 345, SJR: 0.606, h-index: 65)
Advances in Structural Biology     Full-text available via subscription   (Followers: 8)
Advances in Surgery     Full-text available via subscription   (Followers: 7, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 30, SJR: 1.321, h-index: 56)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 15)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 13)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 1.878, h-index: 68)
Advances in Water Resources     Hybrid Journal   (Followers: 43, SJR: 2.408, h-index: 94)
Aeolian Research     Hybrid Journal   (Followers: 5, SJR: 0.973, h-index: 22)
Aerospace Science and Technology     Hybrid Journal   (Followers: 309, SJR: 0.816, h-index: 49)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.318, h-index: 36)
African J. of Emergency Medicine     Open Access   (Followers: 5, SJR: 0.344, h-index: 6)
Ageing Research Reviews     Hybrid Journal   (Followers: 8, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 405, SJR: 1.385, h-index: 72)
Agri Gene     Hybrid Journal  
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 15, SJR: 2.18, h-index: 116)
Agricultural Systems     Hybrid Journal   (Followers: 30, SJR: 1.275, h-index: 74)
Agricultural Water Management     Hybrid Journal   (Followers: 38, SJR: 1.546, h-index: 79)
Agriculture and Agricultural Science Procedia     Open Access  
Agriculture and Natural Resources     Open Access   (Followers: 1)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 53, SJR: 1.879, h-index: 120)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.434, h-index: 14)
Air Medical J.     Hybrid Journal   (Followers: 5, SJR: 0.234, h-index: 18)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.285, h-index: 3)
Alcohol     Hybrid Journal   (Followers: 9, SJR: 0.922, h-index: 66)
Alcoholism and Drug Addiction     Open Access   (Followers: 6)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 1, SJR: 0.436, h-index: 12)
Alexandria J. of Medicine     Open Access  
Algal Research     Partially Free   (Followers: 8, SJR: 2.05, h-index: 20)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.46, h-index: 29)
Allergology Intl.     Open Access   (Followers: 4, SJR: 0.776, h-index: 35)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 7, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 48, SJR: 4.289, h-index: 64)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 5)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 3)
American Heart J.     Hybrid Journal   (Followers: 48, SJR: 3.157, h-index: 153)
American J. of Cardiology     Hybrid Journal   (Followers: 45, SJR: 2.063, h-index: 186)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 38, SJR: 0.574, h-index: 65)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 6, SJR: 1.091, h-index: 45)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 16, SJR: 1.653, h-index: 93)
American J. of Human Genetics     Hybrid Journal   (Followers: 31, SJR: 8.769, h-index: 256)
American J. of Infection Control     Hybrid Journal   (Followers: 24, SJR: 1.259, h-index: 81)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 33, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 46, SJR: 2.023, h-index: 189)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 191, SJR: 2.255, h-index: 171)
American J. of Ophthalmology     Hybrid Journal   (Followers: 54, SJR: 2.803, h-index: 148)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 3)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.249, h-index: 88)
American J. of Otolaryngology     Hybrid Journal   (Followers: 23, SJR: 0.59, h-index: 45)
American J. of Pathology     Hybrid Journal   (Followers: 26, SJR: 2.653, h-index: 228)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 21, SJR: 2.764, h-index: 154)
American J. of Surgery     Hybrid Journal   (Followers: 34, SJR: 1.286, h-index: 125)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 12, SJR: 0.653, h-index: 70)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 5)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.066, h-index: 51)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 55, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 10)
Anales de Cirugia Vascular     Full-text available via subscription  
Anales de Pediatría     Full-text available via subscription   (Followers: 2, SJR: 0.209, h-index: 27)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription   (SJR: 0.104, h-index: 3)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 2, SJR: 2.577, h-index: 7)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38, SJR: 1.548, h-index: 152)
Analytical Biochemistry     Hybrid Journal   (Followers: 162, SJR: 0.725, h-index: 154)
Analytical Chemistry Research     Open Access   (Followers: 8, SJR: 0.18, h-index: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 11)
Anesthésie & Réanimation     Full-text available via subscription   (Followers: 1)
Anesthesiology Clinics     Full-text available via subscription   (Followers: 22, SJR: 0.421, h-index: 40)
Angiología     Full-text available via subscription   (SJR: 0.124, h-index: 9)
Angiologia e Cirurgia Vascular     Open Access  
Animal Behaviour     Hybrid Journal   (Followers: 158, SJR: 1.907, h-index: 126)
Animal Feed Science and Technology     Hybrid Journal   (Followers: 5, SJR: 1.151, h-index: 83)
Animal Reproduction Science     Hybrid Journal   (Followers: 5, SJR: 0.711, h-index: 78)
Annales d'Endocrinologie     Full-text available via subscription   (Followers: 1, SJR: 0.394, h-index: 30)
Annales d'Urologie     Full-text available via subscription  
Annales de Cardiologie et d'Angéiologie     Full-text available via subscription   (SJR: 0.177, h-index: 13)
Annales de Chirurgie de la Main et du Membre Supérieur     Full-text available via subscription  
Annales de Chirurgie Plastique Esthétique     Full-text available via subscription   (Followers: 2, SJR: 0.354, h-index: 22)
Annales de Chirurgie Vasculaire     Full-text available via subscription   (Followers: 1)

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Journal Cover Advanced Powder Technology
  [SJR: 0.739]   [H-I: 33]   [16 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0921-8831 - ISSN (Online) 1568-5527
   Published by Elsevier Homepage  [3043 journals]
  • Effects of single and multi-walled carbon nano tubes on water and engine
           oil based rotating fluids with internal heating
    • Authors: Aziz Ur Rehman; Rashid Mehmood; S. Nadeem; N.S. Akbar; S.S. Motsa
      Pages: 1991 - 2002
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Aziz Ur Rehman, Rashid Mehmood, S. Nadeem, N.S. Akbar, S.S. Motsa
      Three dimensional (3D) flow of a rotating Water and Engine Oil Based fluid is analyzed. Effects of nanometer (nm) sized Single (SWCNT) and multiwalled carbon nanotubes (MWCNT) are examined on flow and heat transfer characteristics. Thermofluid performance within Water and Engine Oil base fluid are investigated using thermal conductivity and viscosity of both single and multiple wall carbon nanotubes (CNTs) of similar volume. The governing partial differential equations are converted into nonlinear, coupled, ordinary differential equations which are solved numerically using a combination of Quasi-linearization and Chebyshev pseudo-spectral methods. Effects of relevant parameters on physical quantities are examined. The obtained results revealed an enhancement in temperature as well as corresponding thermal boundary layer thickness with volume fraction of both types of carbon nanotubes. Due to higher density and thermal conductivity, SWCNTs offer higher skin friction and Nusselt number. Engine oil base fluid depicted higher heat transfer rate and local skin friction than water based fluid for both type of carbon nanotubes. Residual error are plotted to check the accuracy of obtained results. Comparison with previously published literature is made and an excellent agreement is observed which validate our applied numerical scheme.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.03.017
       
  • Investigation of granular surface roughness effect on electrostatic charge
           generation
    • Authors: Jun Yao; Shuo Cong; Yanlin Zhao; Chi-Hwa Wang; Zhongli Ji
      Pages: 2003 - 2014
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Jun Yao, Shuo Cong, Yanlin Zhao, Chi-Hwa Wang, Zhongli Ji
      Electrostatic charge generation is a multivariable and complex issue whose working mechanism has never been fully understood. The objective of this paper is to investigate the effect of granule surface roughness on electrostatic charge generation. Two kinds of granule material, Polyvinyl chloride (PVC) and polypropylene (PP) were used with the granule size of 4mm diameter, 2mm height and the shape was cylinder or semi-cylinder. The working surfaces were grounded and roughness ranged from 0.140 to 8.600μm. It was found that uneven surfaces tended to give rise to voids between two solids, where air stored in the voids was able to accelerate discharging. With the same roughness, PVC tended to generate more electrostatic charge than PP by one order of magnitude. For both materials, electrostatic charge generation first increased with surface roughness and then decreased. The maximum electrostatic charge generated was found to occur when the effects of interaction, contact area and voids discharging were at equilibrium. With the combined effect of humidity, surface roughness and contact area, highest electrostatics generation occurred near the mid-roughness tested in this work. Humidity had more effect on electrostatic charge generation as the granule working surface had lower roughness.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.04.001
       
  • Structure and magnetic properties of ZrO2-coated Fe powders and Fe/ZrO2
           soft magnetic composites
    • Authors: Kaijie Geng; Yuye Xie; Lili Xu; Biao Yan
      Pages: 2015 - 2022
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Kaijie Geng, Yuye Xie, Lili Xu, Biao Yan
      Fe particles were coated with ZrO2 nanopowders using mechanical milling method combined with high temperature recovery annealing process. The effect of milling time on particle size, phase structure and magnetic properties of the core-shell structure powders was studied. Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD) revealed that the surfaces of the composite powders comprised thin and uniform layers of ZrO2 insulating powders after milling. Also, the SEM images showed the morphology of micro-cellular structured compacts with cell-body of Fe particles and indicated that Fe particles were well separated and insulated by thin ZrO2 layers. The Fe/ZrO2 soft magnetic composites displayed much higher electrical resistivity, lower core loss than that of the pure Fe powder cores without ZrO2 layers at medium and high frequencies. The preparation method of ZrO2-insulated Fe powders provides a promising method to reduce the core loss and improve the magnetic properties for soft magnetic composite materials.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.04.029
       
  • Study of electric-arc furnace dust (EAFD) in fly ash and rice husk
           ash-based geopolymers
    • Authors: Morgana Cristina Arnold; Alexandre S. de Vargas; Liane Bianchini
      Pages: 2023 - 2034
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Morgana Cristina Arnold, Alexandre S. de Vargas, Liane Bianchini
      Electric-arc furnace dust (EAFD) is an industrial waste produced by the volatilization of metals during scrap melting in electric arc furnaces. This waste is classified as Class I – hazardous, because lead and cadmium concentrations are above the limits set in the leaching test. Processes are carried out in many countries to recover the metals contained in EAFD. In Brazil, these processes are usually not conducted in the industry because the low percentage of commercially valuable metals makes it economically unfeasible to recover them. One of the study alternatives is the use of EAFD in civil construction. Studies have shown that EAFD increases the mechanical strength of mortars and Portland cement-based concretes. However, EAFD delayed cement setting time, which can jeopardize its use in construction. Thus, this study aims to evaluate the effect of EAFD when added to fly ash (FA) and rice husk ash (RHA) based geopolymers. Geopolymer mortars were prepared at a ratio of 1:3 (FA+RHA: sand, four different granulations) and added with 0, 10, 15, and 20% EAFD in relation to the mass of FA+RHA. Compressive mechanical strength and leaching tests were carried out at the ages of 7, 28, and 91days. Microstructural analyses were performed using XRD, FTIR, and SEM/EDS. EAFD did not negatively influence the geopolymerization process. The highest compressive strength results for the mortars containing the waste were found for 20% of EAFD. All mortars, regardless of EAFD content, were classified as non- hazardous Class II at the age of 91days.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.007
       
  • Green and eco-friendly synthesis of cobalt-oxide nanoparticle:
           Characterization and photo-catalytic activity
    • Authors: Ismat Bibi; Nosheen Nazar; Munawar Iqbal; Shagufta Kamal; Haq Nawaz; Shazia Nouren; Yursa Safa; Kashif Jilani; Misbah Sultan; Sadia Ata; Fariha Rehman; Mazhar Abbas
      Pages: 2035 - 2043
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Ismat Bibi, Nosheen Nazar, Munawar Iqbal, Shagufta Kamal, Haq Nawaz, Shazia Nouren, Yursa Safa, Kashif Jilani, Misbah Sultan, Sadia Ata, Fariha Rehman, Mazhar Abbas
      Cobalt-oxide nanoparticles (NPs) were fabricated using Punica granatum peel extract from cobalt nitrate hexahydrate at low temperature. The synthesized cobalt-oxide NPs were characterized using X-ray powder diffraction, scanning electron microscopy, energy-dispersive X-ray, atomic force microscopy, fourier transform infrared spectroscopy and UV-visible techniques. The cobalt-oxide NPs were in highly uniform shape and size was in the size of 40–80nm. Photo-catalytic activity (PCA) of the synthesized NPs was evaluated by degrading Remazol Brilliant Orange 3R (RBO 3R) dye and a degradation of 78.45% was achieved (dye conc. 150mg/L) using 0.5g cobalt-oxide NPs for 50min irradiation time. In view of eco-benign and cost-effective nature, the present investigation revealed that P. granatum could be used for the synthesis of cobalt-oxide NPs for photo-catalytic applications.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.008
       
  • Synthesis and room temperature coating of nano ZrB2 on copper using
           mechanical roll-milling
    • Authors: Uğursoy Olgun; Mustafa Gülfen; Hasan Göçmez; Mustafa Tuncer
      Pages: 2044 - 2051
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Uğursoy Olgun, Mustafa Gülfen, Hasan Göçmez, Mustafa Tuncer
      In this study, ZrB2 was prepared from ZrOCl2.8H2O, H3BO3 and citric acid by using the gel method. The gel was dried at 400°C and then it was calcined at 1500°C. The prepared 0.5–1μm ZrB2 powder was encapsulated into the Cu tube. For the purpose of coating ZrB2 on Cu metal, the roll-milling of ZrB2 particles inside the cylindrical Cu tube has been performed at room temperature. The prepared ZrB2 coating on Cu was analyzed by using FE-SEM, EDS, XRD, electrical resistivity and CV measurements. The final ZrB2 particle size on the surface of the coating layer was below 100nm, and the coating thicknesses were about 15–20μm. The long nanofiber like ZrB2 structures was observed. The coating of nano ZrB2 on Cu was achieved by using this novel roll-milling process which is an environmental friendly, low cost and practical technique.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.010
       
  • A study of principle stress rotation on granular soils using DEM
           simulation of hollow cylinder test
    • Authors: Benyamin Farhang; Ali Asghar Mirghasemi
      Pages: 2052 - 2064
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Benyamin Farhang, Ali Asghar Mirghasemi
      This study presents the numerical modeling of a hollow cylinder test (HCT) on granular soils by modifying the TRUBAL code. The discrete element method (DEM) was employed for this purpose. Owing to the significant expenditure of the HCT, a verified numerical modeling for this test was developed. The introduced numerical model (HCTBALL) defines plane and cylindrical walls for the boundary conditions to be applied. In addition, the article presents an efficient method to apply the torque. The displacements of the inner and outer walls are interdependent while torsion was applied to control the intermediate principal stress parameter (b). To verify the model, the paper employs results from experimental HCTs on Firoozkooh sand under both monotonic loading and drained conditions. A comparison of the presented model and the experimental results shows that both are closely concordant. It was shown that the deviatoric stress decreases as the principal stress angle (α) increases. In addition, it was observed that by increasing the confining pressure, the internal friction angle (φ′) decreases; however, at higher confining pressures, this reduction is insignificant. Furthermore, this study investigates the coordination number and its relationship to volumetric strain variations.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.011
       
  • Levitation-jet synthesis of In-O nanoparticles with room-temperature
           ferromagnetic properties
    • Authors: Iu. G. Morozov; O.V. Belousova; S. Firth; I.P. Parkin; M.V. Kuznetcov
      Pages: 2065 - 2077
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Iu. G. Morozov, O.V. Belousova, S. Firth, I.P. Parkin, M.V. Kuznetcov
      Octahedral and roughly spherical In-In2O3 nanoparticles ranging in average particle size from 30 up to 300nm were prepared by levitation-jet aerosol synthesis through condensation of metal indium vapor in helium gas flow with gaseous oxygen/air injection at ambient and reduced pressure. Scanning electron microscopy (SEM), X-ray diffraction (XRD), BET measurements, UV–vis, FT-IR, Raman, XPS, and vibrating-sample magnetometry (VSM) characterized the nanoparticles. Room-temperature ferromagnetism with maximum magnetization of up to 0.17emu/g was recorded for the nanoparticles. The results indicate a predominant role of the actual microstructure on the nanoparticle properties. It is suggested that the observed ferromagnetic ordering may be related to intrinsic defects at the In/In2O3 interface structure of such a composite material. This suggestion is in good agreement with the results of optical and XPS experiments on the NPs.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.013
       
  • Solvent-free synthesis of Cu-Cu2O nanocomposites via green thermal
           decomposition route using novel precursor and investigation of its
           photocatalytic activity
    • Authors: Mehdi Mousavi-Kamazani; Zabihullah Zarghami; Reza Rahmatolahzadeh; Majid Ramezani
      Pages: 2078 - 2086
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Mehdi Mousavi-Kamazani, Zabihullah Zarghami, Reza Rahmatolahzadeh, Majid Ramezani
      In the present study, Cu-Cu2O binary nanocomposites were successfully synthesized through a one-pot, cost-effective and green thermal decomposition route using PMP-Cu(II), extracted from pomegranate marc peels (PMP) by Cu(II), as a novel starting reagent for the first time. The morphology, crystalline structure, and composition of as-prepared Cu-Cu2O nanocomposites were extensively characterized by SEM, XRD, EDS and HRTEM. Effect of reaction parameters such as time, temperature and precursor type on product composition and morphology was evaluated. Moreover, methylene blue (MB) was used as a model of organic dye pollutant and photodegradation experiments were conducted by UV-vis spectrophotometry. The as-synthesized Cu-Cu2O binary nanocomposites demonstrated their potential as an excellent photocatalyst for degradation of MB under visible-light irradiation and Cu-Cu2O photocatalyst with higher content of Cu2O (prepared in air) exhibits the highest photocatalytic efficiency (∼99% degradation of MB in <150min).
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.014
       
  • Magnetic separation and adsorptive performance for methylene blue of
           mesoporous NiFe2O4/SBA-15 nanocomposites
    • Authors: Xiaojiong Chen; Panfeng Wang; Jingcai Xu; Yanbing Han; Hongxiao Jin; Dingfeng Jin; Xiaoling Peng; Bo Hong; Jing Li; Yanting Yang; Hongliang Ge; Xinqing Wang
      Pages: 2087 - 2093
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Xiaojiong Chen, Panfeng Wang, Jingcai Xu, Yanbing Han, Hongxiao Jin, Dingfeng Jin, Xiaoling Peng, Bo Hong, Jing Li, Yanting Yang, Hongliang Ge, Xinqing Wang
      Magnetic NiFe2O4/SBA-15 nanocomposites were synthesized by a facile impregnation method, and NiFe2O4 nanoparticles presented spinel phase structure and existed in the mesopores of SBA-15. Partial mesopores were blocked by NiFe2O4 nanoparticles and micropores formed, which the capillarity of micropores played a decisive role for methylene blue (MB) adsorption. The saturation magnetization increased from 2.34emug−1 to 10.03emug−1 with the NiFe2O4 content, while the specific surface area decreased from 552.18m2 g−1 to 260.40m2 g−1 and pore volume decreased from 1.13cm3 g−1 to 0.49cm3 g−1. MB adsorption could be improved by optimizing the NiFe2O4 content of the nanocomposites. MB could be adsorbed completely in 60min with the optimum nanocomposites and could be separated easily from water by magnetic separation technique.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.015
       
  • CFD simulation of particle segregation in a rotating drum. Part I:
           Eulerian solid phase kinetic viscosity
    • Authors: An-Ni Huang; Hsiu-Po Kuo
      Pages: 2094 - 2101
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): An-Ni Huang, Hsiu-Po Kuo
      Although the Eulerian approach coupling the kinetic theory of granular flow is usually used to study granular flows with relative lower solid fractions, it can be used to study relative denser granular flows if appropriate solid phase kinetic viscosity values were adopted. A granular bed surface fitting (BSF) method is proposed to determine the appropriate solid phase kinetic viscosities of the granular flows in a rotating drum. The specularity coefficient is also used to address the interaction between particles and the drum wall. The BSF solid phase kinetic viscosity increases with decreasing of particle sizes and drum rotational speeds. The BSF solid phase kinetic viscosity and the specularity coefficient follow a power-law relationship with 0.6–1.1 as the exponent of the specularity coefficient. The BSF solid phase kinetic viscosities for the particles of two different sizes are used to study particle segregation in a rotating drum. The core thickening segregation mechanism and the segregation band formations are well predicted.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.016
       
  • Experimental study on gas-solid flow characteristics in an internally
           circulating fluidized bed cold test apparatus
    • Authors: Yangfan Song; Xiaofeng Lu; Quanhai Wang; Jianbo Li; Sicong Sun; Xiong Zheng; Fan Yang; Xuchen Fan
      Pages: 2102 - 2109
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Yangfan Song, Xiaofeng Lu, Quanhai Wang, Jianbo Li, Sicong Sun, Xiong Zheng, Fan Yang, Xuchen Fan
      A self-designed internally circulating fluidized bed cold test apparatus was built to investigate the gas-solid flow characteristics in a new kind of internally circulating fluidized bed furnace. The test material was circulating ash from a power plant CFB boiler. Optical fiber probes and differential pressure transmitters were employed for the measurements. The particle internal circulation rate and the solids holdup in the upper space of the furnace were studied by changing the fluidization air velocity in the main chamber, the height of partition wall and the initial static bed height. The results showed that with the increase of fluidization air velocity in the main chamber, the particle internal circulation rate increased at first then decreased. Meanwhile, the particle internal circulation rate decreased with the increase of the partition wall height and increased with the increase of initial static bed height in the main chamber. The solids holdup in the upper space of the internally CFB cold test apparatus was 1–4% of that in the normal CFB cold test apparatus. The proportion of particle external circulation rate was relatively low in the circulating system.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.017
       
  • Numerical study on heat transfer and entropy generation of developing
           laminar nanofluid flow in helical tube using two-phase mixture model
    • Authors: Hamed Khosravi Bizhaem; Abbas Abbassi
      Pages: 2110 - 2125
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Hamed Khosravi Bizhaem, Abbas Abbassi
      Nanofluids and helical tubes are among the best methods for heat transfer enhancement. In the present study, laminar, developing nanofluid flow in helical tube at constant wall temperature is investigated. The numerical simulation of Al2O3-water nanofluid with temperature dependent properties is performed using the two-phase mixture model by control volume method in order to study convective heat transfer and entropy generation. The numerical results is compared with three test cases including nanofluid forced convection in straight tube, velocity profile in curved tube and Nusselt number in helical tubes that good agreement for all cases is observed. Heat transfer coefficient in developing region inside a straight tube using mixture model shows a better prediction compared to the homogenous model. The effect of Reynolds number and nanoparticle volume fraction on flow and temperature fields, local and overall heat transfer coefficient, local entropy generation due to viscous dissipation and heat transfer, and the Bejan number is discussed in detail and compared with the base fluid. The results show that the nanofluid and the base fluid have almost the same axial velocity profile, but their temperature profile has significant difference in developing and fully developed region. Entropy generation ratio by nanofluid to the base fluid in each axial location along the coil length showed that the entropy generation is reduced by using nanofluid in at most length of the helical tube. Also, better heat transfer enhancement and entropy generation reduction can be achieved at low Reynolds number.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.018
       
  • Microstructure characterization, mechanical properties, compressibility
           and sintering behavior of Al-B4C nanocomposite powders
    • Authors: Hamid Alihosseini; Kamran Dehghani; Jamshid Kamali
      Pages: 2126 - 2134
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Hamid Alihosseini, Kamran Dehghani, Jamshid Kamali
      In the present work, Al-xB4C nanocomposite (x =0, 1, 2, 3, 4 and 5 in wt%, having the average B4C size of 50nm) were prepared using a high-energy ball mill. The milling times up to 16h were applied. Then, the microstructural evolutions, mechanical properties, compressibility and sintering behavior of nanocomposites were investigated. The changes in powders morphology and microstructure during the milling process were characterized by laser diffraction particle size analyzer (LDA), SEM, XRD, EDS and TEM techniques. Compressibility and sintering behavior of milled powders compacted under different pressures (100–900MPa) and at different sintering temperatures (500, 550 and 600°C) were also studied. The pressing behavior of the nanocomposites was analyzed using linear compaction equations developed by Heckel, Panelli-Filho and Ge. The results showed the significant effects of B4C amounts and sintering temperatures on the compressibility and sintering behavior of nanocomposites. The increase in the B4C amount led to a decrease in both the compressibility rate and the sinterability of specimens. The maximum compression strength of 265MPa and Vickers hardness of 165VHN were obtained for Al-5wt.% B4C nanocomposite milled for 16h followed by sintering at 600°C.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.019
       
  • Effect of high-pressure torsion processing on the microstructure evolution
           and mechanical properties of consolidated micro size Cu and Cu-SiC powders
           
    • Authors: Mohamed Ibrahim Abd El Aal
      Pages: 2135 - 2150
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Mohamed Ibrahim Abd El Aal
      In this paper, micro size Cu and Cu-SiC composites powders were consolidated by powder metallurgy (PM) followed by sintering or high-pressure torsion (HPT) to study the effect of the different processing methods on microstructure evolution and mechanical properties. HPT contributes in producing fully dense samples with a relative density higher than those processed by PM followed by sintering. Bimodal and trimodal microstructures with a mixture of ultrafine grain (UFG) and micro or nano grain sizes were noted in the case of Cu and Cu-SiC HPTed samples, respectively. The increase of the SiC volume fraction (SiC%) produces smaller grain size with higher fractions of high angle grain boundaries (HAGBs) in the HPTed Cu-SiC samples than that in the case of HPTed Cu sample. The HPT under a pressure of 10GPa and 15 revolutions was effective to achieve a complete fragmentation of SiC particles down to ultrafine particle size. HPT processing of Cu and Cu-SiC composites enhanced the mechanical properties (hardness and tensile strength) with conserving a reasonable degree of ductility (elongation%). The yield strength of the samples was estimated based on the microstructure observations and processing parameters by different models correctly with an error range of 5.1–1% from the experiential results.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.020
       
  • Improved hydrogen storage properties of Mg-Li-Al-H composite system by
           milling with Fe2O3 powder
    • Authors: M. Ismail; F.A. Halim Yap; M.S. Yahya
      Pages: 2151 - 2158
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): M. Ismail, F.A. Halim Yap, M.S. Yahya
      A sample of Fe2O3-doped 4MgH2-Li3AlH6 composite was prepared by the ball milling technique, and the hydrogen storage properties were investigated for the first time. Results showed that the addition of Fe2O3 powder reduced the decomposition temperature and improved de/hydrogenation kinetics compared with undoped 4MgH2-Li3AlH6. The onset decomposition temperature for the Fe2O3-doped 4MgH2-Li3AlH6 composite decreased by 75°C compared with that of the undoped composite. For the sorption kinetics, a hydrogen absorption capacity of 2.4wt% was reached after 60min in the 10wt% Fe2O3-doped 4MgH2-Li3AlH6 composite, whereas the neat composite absorbed 2.3wt% hydrogen under the same conditions. For desorption kinetics, the Fe2O3-doped 4MgH2-Li3AlH6 sample released 2.5wt% hydrogen under 10min of dehydrogenation, but the neat 4MgH2-Li3AlH6 composite only desorbed 2.0wt% hydrogen within the same period. The apparent activation energy calculated by Kissinger analysis for hydrogen desorption decreased to 112.9kJ/mol after Fe2O3 was added compared with the undoped composite, which was 145.4kJ/mol. The X-ray diffraction analysis shows the formation new phase of Li2Fe3O4 in the doped sample after ball milling processes that could act as the real catalyst in the Fe2O3-doped 4MgH2-Li3AlH6 composite.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.021
       
  • Investigations on the MnO2-Fe2O3 system roasted in air atmosphere
    • Authors: Bingbing Liu; Yuanbo Zhang; Juan Wang; Manman Lu; Zhiwei Peng; Guanghui Li; Tao Jiang
      Pages: 2167 - 2176
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Bingbing Liu, Yuanbo Zhang, Juan Wang, Manman Lu, Zhiwei Peng, Guanghui Li, Tao Jiang
      Solid-state reaction method is a common and effective technique to synthesize ferrites. This work investigated the phase transformation of MnO2 and Fe2O3 system roasted at 500–1400°C in air atmosphere to understand the formation process of manganese ferrite. The results showed that the formation of manganese ferrite (Mn x Fe3− x O4) was derived from the reaction between Fe2O3 and Mn3O4 (the decomposition product of MnO2). Below 900°C, MnO2 firstly decomposed to Mn2O3 and then to Mn3O4, and Fe2O3 was seldom reacted with Mn2O3 and Mn3O4. When the temperature went up to 1000°C, Fe2O3 easily reacted with Mn3O4 to generate manganese ferrite. The reaction degree was enhanced dramatically with the rising of temperature. Moreover, the x value in the Mn x Fe3− x O4 increased from 0 to 1 from 900°C to 1400°C. In other words, the higher the temperature was, the closer the Mn x Fe3− x O4 was to MnFe2O4. Thermodynamic analysis of MnO2-Fe2O3 system under different O2 partial pressures was carried out to further explain the formation mechanism.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.023
       
  • Direct tensile tests on particulate agglomerates for the determination of
           tensile strength and interparticle bond forces
    • Authors: Tobias Wollborn; Marcelo F. Schwed; Udo Fritsching
      Pages: 2177 - 2185
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Tobias Wollborn, Marcelo F. Schwed, Udo Fritsching
      The importance of direct tensile tests on solid and capillary bonded particulate agglomerates is investigated and compared to compression test measurements. The properties of wet agglomerates are varied by changing the contact angle by means of functionalization of the particle surface. Process conditions are considered by variation of ambient humidity. A qualitative evaluation of the results is performed by analyzing the measured force distance curves of different tensile tests. The results are quantitatively evaluated by calculating the breakage strength, mass related breakage energy and breakage probability showing that the ratio between tensile and compressive tests is highly dependent on the adjusted parameters. Next to the process parameter effect, also the influence of agglomerate size is considered. Tensile strength data are used to estimate the single bond forces between the primary particles of the agglomerates. Tensile and compressive test results are compared to numerical results (DEM) of agglomerate breakage using an elastic stiff bond model.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.024
       
  • Preparation of Zr-doped mesoporous TiO2 particles and their applications
           in the novel working electrode of a dye-sensitized solar cell
    • Authors: Wei-Hua Lu; Chuen-Shii Chou; Chung-Yung Chen; Ping Wu
      Pages: 2186 - 2197
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Wei-Hua Lu, Chuen-Shii Chou, Chung-Yung Chen, Ping Wu
      This paper presents an implementation of our recent theory on the suspension of electron-hole recombination via electronic- and micro-structure optimization to study the influence of Zr-doping on the efficiency (η) of TiO2-based dye-sensitized solar cells (DSSCs). We developed a four-layered working electrode, in which the size of particles increased from the bottom layer of TiO2 (P-25) through three successive layers of Zr-doped TiO2, which were calcined at 450, 600, and 850°C respectively. The enhancement in open-circuit photovoltage (Voc) and short-circuit photocurrent density (Jsc ) can be attributed to the electronic- and micro-structures in the working electrode. The former is related to band bending, whereas the latter is related to light-scattering within multiple layers. Simulation results (FactSage) demonstrate that Zr doping in TiO2 can suspend or delay the formation of oxygen vacancies and thereby reduce the number of electron scattering centers, which helps to suspend electron-hole recombination by strengthening Ti-O bonds. The proposed four-layered working electrode produced an 80.2% increase in η, compared with DSSCs using a TiO2 (P-25) electrode. This study demonstrated a novel metal doping strategy for the manipulation of electronic structure and photoelectron conversion efficiency. The proposed methodology could also be used to guide the design of photo-catalysts in general.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.026
       
  • Study of the shear behavior of binary granular materials by DEM
           simulations and experimental triaxial tests
    • Authors: Kai Wu; Sébastien Rémond; NorEdine Abriak; Patrick Pizette; Frédéric Becquart; Songyu Liu
      Pages: 2198 - 2210
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Kai Wu, Sébastien Rémond, NorEdine Abriak, Patrick Pizette, Frédéric Becquart, Songyu Liu
      This paper aims at studying the shear behavior of mixtures of fine and coarse particles by classical triaxial tests. The work is performed both on experimental tests and computer simulations by discrete element method. The comparisons between experimental and simulation results on monosized and binary samples show that the DEM model can reproduce deviatoric curves satisfactorily in experimental conditions. The shear behavior of monosized and binary systems with the same initial void ratio differs significantly, suggesting that the state of compaction of the system is more influential than the initial void ratio. Comparison between compacted and uncompacted samples confirms that compaction increases the shear strength of granular matter. At the particle scale, the coordination number decreases with the augmentation of the volume fraction of coarse particles. The average rotation velocity of fine particles is higher than coarse particles, but their particle stress tensor is smaller than coarse ones.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.05.027
       
  • Theoretical investigation on heat transfer to burning char of spheroidal
           particles
    • Authors: Jie Li; Jian Zhang
      Pages: 2211 - 2217
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Jie Li, Jian Zhang
      The combustion of biomass fuel provides efficient and inexpensive utilization of solid biomass. Biomass particles generally exhibit non-spherical shapes, which affect the heat and mass transfer and further the char surface reactions. The prolate and oblate spheroidal particles are considered presently. The energy balance is employed for the gas phase near the particle in spheroidal coordinate system. A theoretical study is conducted on the char combustion of the spheroidal particles under either static conditions or forced convection. The expressions for the Nusselt numbers of both prolate and oblate spheroids are obtained. The char combustion rates for the spheroidal particles are affected by the Nusselt number and the particle surface area.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.001
       
  • A facile sol-gel method for the fabrication of nitrogen doped
           TiO2/NiFe2O4/diatomite composite with enhanced photoactivity
    • Authors: Yan Chen; Qiong Wu; Qiutong Jin; Kuiren Liu
      Pages: 2225 - 2231
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Yan Chen, Qiong Wu, Qiutong Jin, Kuiren Liu
      N doped TiO2/NiFe2O4/diatomite (NND) photocatalytic composite was fabricated via a facile two-step sol-gel method. Its crystal structure, morphology, specific surface area, pore size distribution and magnetic property were systematically characterized and analyzed. The photoactivity of NND was investigated via the degradation of Rhodamine B (RhB) solution under visible light irradiation. NND achieved high photodegradation efficiency due to the synergy between adsorption of diatomite (Dt) and degradation of TiO2, as well as the synergy between TiO2 and NiFe2O4. NND could be simply separated from aquatic environment using an external magnet, due to the ferromagnetism of NiFe2O4. We consider that NND is applicable for wastewater treatment.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.003
       
  • Morphological and phase evaluation of Al/15wt.% BN nanocomposite
           synthesized by planetary ball mill and sintering
    • Authors: Reza Gostariani; Mohsen Asadi Asadabad; Mohammad Hossein Paydar; Ramin Ebrahimi
      Pages: 2232 - 2238
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Reza Gostariani, Mohsen Asadi Asadabad, Mohammad Hossein Paydar, Ramin Ebrahimi
      In this study, Al/15wt.% BN nanocomposite was fabricated by high energy ball milling, cold compaction, and sintering process. Then the effect of milling process on the morphology change and phase evaluation was studied. The Aluminum (45µm) and hexagonal boron nitride (70nm) powders were milled using planetary ball mill under a pure argon atmosphere for various times of 75, 150, 300 and 600min. The as-milled powders were consolidated at 400MPa pressure and sintered at 600°C for 60min. The morphology change evaluation studied by using scanning electron microscopy (SEM) showed that the equiaxed composite powders were obtained after a short time milling process of 150min. The steady state condition between welding and fracturing occurred by continuous milling up to 600min. The results of X-ray diffraction patterns and differential scanning calorimetric (DSC) revealed that the BN particles completely decomposed to boron and nitrogen and dissolved in the Al matrix after 300min of ball milling and the AlN and AlB2 as in-situ phases were formed after sintering at temperatures above 580°C.
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      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.004
       
  • Compartmental residence time estimation in batch granulators using a
           colourimetric image analysis algorithm and Discrete Element Modelling
    • Authors: Andrew D. McGuire; Kok Foong Lee; Maksym Dosta; Sebastian Mosbach; Jan-Georg Rosenboom; Stefan Heinrich; Markus Kraft
      Pages: 2239 - 2255
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Andrew D. McGuire, Kok Foong Lee, Maksym Dosta, Sebastian Mosbach, Jan-Georg Rosenboom, Stefan Heinrich, Markus Kraft
      In this paper we present an experimental technique and a novel colourimetric image analysis algorithm to economically evaluate particle residence times within regions of batch granulators for use in compartmental population balance models. Residence times are extracted using a simple mixing model in conjunction with colourimetric data. The technique is applied to the mixing of wet coloured granules (binary and ternary systems) in a laboratory scale mixer. The resulting particle concentration evolutions were in qualitative agreement with those from the mixing model. It was seen that the algorithm was most stable in the case of the binary colour experiments. Lastly, simulations using the Discrete Element Method (DEM) were also performed to further validate the assumptions made in the analysis of the experimental results. Particle concentrations from the simulations showed the same trends as the experiment and highlighted the importance of particle size distributions on the DEM residence times.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.005
       
  • Template-free synthesis of flower-shaped zero-valent iron nanoparticle:
           Role of hydroxyl group in controlling morphology and nitrate reduction
    • Authors: Ananya Ghosh; Suvanka Dutta; Indrani Mukherjee; Sourav Biswas; Sriparna Chatterjee; Rajnarayan Saha
      Pages: 2256 - 2264
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Ananya Ghosh, Suvanka Dutta, Indrani Mukherjee, Sourav Biswas, Sriparna Chatterjee, Rajnarayan Saha
      Well-dispersed single phasic flower-like zero valent iron nanoparticles have been synthesized under aerobic conditions using a facile approach without the addition of any additives or templates. The role of hydroxyl groups of polyhydroxy alcohols in controlling surface morphology of nanoparticles has been thoroughly investigated. The obtained nanoparticles have been characterized by TEM, FE-SEM, XRD and BET surface area analyzer. Electron microscopy analyses reveal that the solvent plays a pivotal role in determining the morphology of the particles. With increase in viscosity of the solvent, formations of ‘petal-like’ structures, which are joined at the center are formed. The nitrate removal efficiency of the iron nanoparticles synthesized in different solvents has been studied and it is seen that the “flower-like” iron nanoparticles were most active in the removal of nitrate. Experiments have been done by varying (i) nitrate concentrations, (ii) nanoparticle dose, and (iii) type of nanoparticles. The results conclude that highest removal efficiency (∼100%) was achieved when the nanoparticle dose was 2.88g/L, even for high nitrate concentrations up to 400mg/L. The major highlight of this work is the fact that even though the nanoparticles synthesized in glycerol-water mixture have larger size in comparison to the other nanoparticles, still they remove the nitrates with highest efficiency.”
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.006
       
  • Ag/TiO2/bentonite nanocomposite for biological applications: Synthesis,
           characterization, antibacterial and cytotoxic investigations
    • Authors: Bama Krishnan; Sundrarajan Mahalingam
      Pages: 2265 - 2280
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Bama Krishnan, Sundrarajan Mahalingam
      Bentonite (bent) clay supported silver (Ag)/titanium dioxide (TiO2) nanocomposite material was green synthesized by facile thermal decomposition method in the absence of reducing and precipitating agents. The samples were characterized by XRD, BET, HR-SEM with EDX mapping, TEM with SAED patterns, XPS, PSA, FT-IR, and UV–Vis DRS. XRD and EDX spectra showed peaks of Ag and TiO2, confirming the formation of the Ag/TiO2 nanoparticles in the composite. TEM revealed the uniform distribution of Ag/TiO2 nanoparticles cluster on the surface of the bent with an average size of ∼5 to 50nm. The antibacterial activities of Na-bent, Ag, TiO2, and Ag/TiO2/bent nanocomposite samples were tested against Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) bacteria by the well diffusion method. Furthermore, the cytotoxicity of Ag/TiO2/bent nanocomposite material was determined by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay. Also, the succinate-dehydrogenase release showed the nontoxic nature of the nanocomposite at low concentrations. The cytotoxicity results of samples were evaluated using human embryonic kidney cell line (HEK 293) and have given excellent biocompatibility and cell proliferation in the in vitro studies.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.007
       
  • Investigation of Ti coatings on cubic boron nitride (cBN) grits by
           discharge treatment in spark plasma sintering system
    • Authors: Rui Chang; Yanhui Wang; Jianbing Zang; Yiqing Yu; Jing Lu; Xipeng Xu
      Pages: 2281 - 2287
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Rui Chang, Yanhui Wang, Jianbing Zang, Yiqing Yu, Jing Lu, Xipeng Xu
      The Ti coatings on cubic boron nitride (cBN) grits were prepared by discharge treatment on a mixture of Ti powders and cBN grits in spark plasma sintering system. The uniform and full coatings with a thickness of ∼1.2μm were prepared at 850°C for 60min, which were constituted with TiB2, TiN, and Ti phases. The compressive fracture strength and toughness impact of the Ti-coated cBN grits were 11.6% and 7.4% higher than the cases of the pristine ones, respectively. With the aid of Ti coatings, the interface bonding strength between cBN grits and Fe-based matrix was improved by 335MPa in the Fe-based matrix/cBN composites.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.008
       
  • Experimental investigation of heat transfer enhancementin helicalcoil heat
           exchangers using water based CuO nanofluid
    • Authors: P.J. Fule; B.A. Bhanvase; S.H. Sonawane
      Pages: 2288 - 2294
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): P.J. Fule, B.A. Bhanvase, S.H. Sonawane
      The present work deals with the study of heat transfer enhancement using water based CuO nanofluids in the helical coil heat exchanger. Nanofluids were prepared using two-step method by using wet chemical method. Nanofluids with various volume percentage between 0 and 0.5 of CuO nanoparticles and their flow rate between 30 and 80 LPH (Reynolds number ranging from 812 to 1895, Laminar flow regime) were considered in the present study. The setup consists of a test section (helical coil), cooler, reservoir, pump, flow meter, thermocouples and flow controlling system. The temperature measurements were carried out with the help of thermocouples. The investigation was carried out to study the effect of particle loading and flow rate on heat transfer coefficient and Nusselt number. It has been found that the increase in the loading of CuO nanoparticles in base fluid shows a significant enhancement in the heat transfer coefficient of nanofluid. In the present study, at 0.1vol% concentration of CuO nanoparticles in nanofluid, enhancement in heat transfer coefficient was 37.3% as compared to base fluid while at 0.5vol%, it is as high as 77.7%. Also with the increase in the flow rate of the CuO nanofluid, significant increase in heat transfer coefficient was observed.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.010
       
  • Free convection of hybrid Al2O3-Cu water nanofluid in a differentially
           heated porous cavity
    • Authors: S.A.M. Mehryan; Farshad M. Kashkooli; Mohammad Ghalambaz; Ali J. Chamkha
      Pages: 2295 - 2305
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): S.A.M. Mehryan, Farshad M. Kashkooli, Mohammad Ghalambaz, Ali J. Chamkha
      Hybrid nanofluids are a new type of enhanced working fluids, engineered with enhanced thermo-physical properties. The hybrid nanofluids profit from the thermo-physical properties of more than one type of nanoparticles. The present study aims to address the free convective heat transfer of the Al2O3-Cu water hybrid nanofluid in a cavity filled with a porous medium. Two types of important porous media, glass ball and aluminum metal foam, are considered for the porous matrix. The experimental data show dramatic enhancement in the thermal conductivity and dynamic viscosity of the synthesized hybrid nanofluids, and hence, these thermophysical properties could not be modeled using available models of nanofluids. Thus, the actual available experimental data for the thermal conductivity and the dynamic viscosity of hybrid nanofluids are directly utilized in the present theoretical study. Various comparison with results published previously in the literature are performed and the results are found to be in excellent agreement. In most cases, the average Nusselt number Nul is decreasing function of the volume fraction of nanoparticles. The results show the reduction of heat transfer using nanoparticles in porous media. The observed reduction of the heat transfer rate is much higher for hybrid nanofluid compared to the single nanofluid.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.011
       
  • A novel wet polymeric precipitation synthesis method for monophasic
           β-TCP
    • Authors: I. Grigoraviciute-Puroniene; K. Tsuru; E. Garskaite; Z. Stankeviciute; A. Beganskiene; K. Ishikawa; A. Kareiva
      Pages: 2325 - 2331
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): I. Grigoraviciute-Puroniene, K. Tsuru, E. Garskaite, Z. Stankeviciute, A. Beganskiene, K. Ishikawa, A. Kareiva
      β-Tricalcium phosphate (β-Ca3(PO4)2, β-TCP) powders were synthesized using wet polymeric precipitation method for the first time to our best knowledge. The results of X-ray diffraction analysis showed the formation of almost single a Ca-deficient hydroxyapatite (CDHA) phase of a poor crystallinity already at room temperature. With continuously increasing the calcination temperature up to 800°C the crystalline β-TCP was obtained as the main phase. It was demonstrated that infrared spectroscopy is very effective method to characterize the formation of β-Ca3(PO4)2. The SEM results showed that β-Ca3(PO4)2 solids were homogeneous having a small particle size distribution. The β-TCP powders consisted of spherical particles varying in size from 100 to 300nm. Fabricated β-TCP specimens were placed to the bones of the rats and maintained for 1–2months. The histological properties of these samples will be also investigated.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.014
       
  • Framing the performance of induced magnetic field and entropy generation
           on Cu and TiO2 nanoparticles by using Keller box scheme
    • Authors: Z. Iqbal; E.N. Maraj; Ehtsham Azhar; Zaffar Mehmood
      Pages: 2332 - 2345
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Z. Iqbal, E.N. Maraj, Ehtsham Azhar, Zaffar Mehmood
      Aim of present communication is to inspect the impact of induced magnetic field and entropy generation on water based nanofluid. The thermal characteristic of nanofluids are explored using copper and titanium nanoparticles. The governing physical problem is modelled and by using scaling group of transformations. Obtained system of coupled nonlinear partial differential equations is converted into set of ordinary differential equations. These equations are solved numerically using implicit finite difference scheme. Entropy generation analysis is carried out to measure the disorder within the thermodynamical system. Effect of nanoparticles volume fraction on magnetic field components, skinfriction and local heat flux are computed and discussed in a physical manner. It is examined that magnetic field parameter reduces wall stress while it increases rate of heat transfer at surface. Local heat flux accelerate with increasing nanoparticles volume fraction. TiO 2 water based nanofluid showed better results for heat transfer than Cu water based nanofluid.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.015
       
  • Influence of TiBw volume fraction on microstructure and high-temperature
           properties of in situ TiBw/Ti6Al4V composites with TiBw columnar
           reinforced structure fabricated by pre-sintering and canned extrusion
    • Authors: Wenzhen Chen; Jianlei Yang; Wencong Zhang; Mengmeng Wang; Dandan Du; Guorong Cui
      Pages: 2346 - 2356
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Wenzhen Chen, Jianlei Yang, Wencong Zhang, Mengmeng Wang, Dandan Du, Guorong Cui
      Tailoring TiBw volume fraction was utilized in TiBw/Ti6Al4V composites to pursue performance optimization for potential high-temperature applications. Detailed investigations focused on the influence of TiBw volume fraction on microstructure and its correlations with mechanical properties mainly at high temperatures ranging from 500°C to 700°C. Highly aligned TiB whiskers along extrusion direction caused the formation of TiBw columnar reinforced structure, which was composed of ductile TiBw-poor interior regions and hardened TiBw-rich boundaries. Refined prior β phases arising from dynamic recrystallization led to the size reduction in α colonies. This tendency commonly accompanied with the formation of equiaxed α phase was evidently enhanced by the restriction of increasing TiB whiskers at the boundaries. Much better strengthening of TiB whiskers was achieved on the premise of good interfacial bonding with Ti matrix at high temperatures, and the strengthening depended linearly on their volume fractions, with strength increments of about 44.3MPa/vol.% at 500°C, and 27.5MPa/vol.% at 600°C, yet merely 6.3MPa/vol.% at 700°C. Attributed to the softening of Ti matrix and the crack retardation of ductile TiBw-poor regions by raising temperature, enhanced ductility was negatively correlated with TiBw volume fraction below 600°C, but positively at 700°C under the possible grain boundary sliding inspired by ample equiaxed α phase.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
      DOI: 10.1016/j.apt.2017.06.016
       
  • A review on sustainable synthesis of zeolite from kaolinite resources via
           hydrothermal process
    • Authors: Tijjani Abdullahi; Zawati Harun; Mohd Hafiz Dzarfan Othman
      Pages: 1827 - 1840
      Abstract: Publication date: August 2017
      Source:Advanced Powder Technology, Volume 28, Issue 8
      Author(s): Tijjani Abdullahi, Zawati Harun, Mohd Hafiz Dzarfan Othman
      Synthesis of zeolite through hydrothermal process has been commonly used for decades. However, it does not satisfy the serious terms of sustainability that leads to reduction of costs, reduction of waste, eliminating negative environmental impacts and improvement of any system efficiency. The bottom line of this review paper is to highlight the current trends in the hydrothermal synthesis of zeolite, attention is paid to the utilization of natural resources and manufacturing wastes as raw materials to synthesize zeolite. Optimum conditions for sustainable hydrothermal synthesis of zeolites from kaolinite natural resources are also studied and discussed in this paper.
      Graphical abstract image

      PubDate: 2017-06-12T08:30:57Z
      DOI: 10.1016/j.apt.2017.04.028
       
  • Inside Front Cover (Aims &amp; Scope, Editors)
    • Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9


      PubDate: 2017-08-03T02:36:18Z
       
  • Full title (Editorial Board Members)
    • Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9


      PubDate: 2017-08-03T02:36:18Z
       
  • MHD 3D free convective flow of nanofluid over an exponentially stretching
           sheet with chemical reaction
    • Authors: M.K. Nayak; Noreen Sher Akbar Tripathi Z.H. Khan V.S. Pandey
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): M.K. Nayak, Noreen Sher Akbar, D. Tripathi, Z.H. Khan, V.S. Pandey
      This paper deals with a problem where the effect of variable magnetic field and chemical reaction on free convective flow of an electrically conducting incompressible water based nanofluid over an exponentially stretching sheet has been investigated. In the present study, Buongiorno model associated with Brownian motion and thermophoretic diffusion is employed to describe the heat transfer enhancement of nanofluids. Some suitable similarity transformations reduced the governing boundary layer non-linear partial differential equations into a set of ordinary non-linear differential equations. The transformed equations are then solved numerically using fourth order Runga-Kutta method along with Shooting technique. The major outcomes of the present study is that the magnetic field impedes the fluid motion while thermal as well as mass buoyancy forces accelerate it, the thermophoretic diffusion enhances dimensionless fluid temperature as well as concentration leading to thicker thermal and concentration boundary layers. On the other hand, concentration exponent, Brownian motion parameter and chemical reaction parameter exhibit reverse trend on temperature and concentration. In addition, the presence of magnetic field under the influence of thermal as well as mass buoyancies supports to reduce the rate of heat transfer as well as wall shear stress while the first order chemical reaction develops a thinner concentration boundary layer.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
       
  • Investigation of wear behaviours of Al matrix composites reinforced with
           different B4C rate produced by powder metallurgy method
    • Authors: Yahya
      Abstract: Publication date: September 2017
      Source:Advanced Powder Technology, Volume 28, Issue 9
      Author(s): Yahya Hışman Çelik, Kübra Seçilmiş
      In this study, the effects of wear behaviours of Al matrix composites reinforced with different B4C rate produced by powder metallurgy method were investigated. Al and B4C powders with purity of 99.9% and sizes of 25–44µm were prepared as pure Al, 4% B4C/Al, 8% B4C/Al, 12% B4C/Al and 16% B4C/Al. After these prepared mixtures were pressed under 350MPa, they were sintered for 90min at 580°C in atmospheric environment. Microhardness and wear tests of the produced samples were carried out. Wear experiments of these composites were performed with specially manufactured test equipment at different application loads (5N, 10N and 15N), different sliding distances (250m, 500m, 750m and 1000m) and a constant speed of 0.46m/s. In addition, optical microscope, SEM, EDS analyses were used to determine the microstructural changes in the worn and unworn surface of the manufactured composite materials. The results of experimental studies show that the increasing the B4C reinforced rate in composites with Al matrix has led to increase of the hardness and to reduce of the wear loss.
      Graphical abstract image

      PubDate: 2017-08-03T02:36:18Z
       
  • Utilization of a ZnS(en)0.5 photocatalyst hybridized with a CdS component
           for solar energy conversion to hydrogen
    • Authors: Hyejin Kang; Jung Hyeun Kim
      Abstract: Publication date: Available online 14 July 2017
      Source:Advanced Powder Technology
      Author(s): Hyejin Kang, Jung Hyeun Kim
      Photocatalytic solar energy conversion to chemical energy attracts great attention due to its high potential in harvesting renewable energy for the future. A ZnS(en)0.5 photocatalyst hybridized with a CdS component was synthesized by solvothermal and precipitation methods to compare the effect of preparation methods on photocatalytic performance. The highest hydrogen production rate (559μmolg−1 h−1) was achieved from a solvothermally synthesized ZnS(en)0.5−CdS composite at 80wt% of CdS content under standard 1-sun-irradiation condition (1000W/m2). Photocatalytic hydrogen production rates from ZnS(en)0.5−CdS photocatalysts were highly associated with degrees of charge separation, crystallinity, reduction power, and light absorption. By comparing two different routes for the synthesis of ZnS(en)0.5−CdS photocatalysts, solvothermally-fabricated material was shown to have a higher photocatalytic activity compared with material fabricated by a precipitation method. This improvement may be due to its excellent crystalline and charge-separation characteristics.
      Graphical abstract image

      PubDate: 2017-07-24T02:16:25Z
      DOI: 10.1016/j.apt.2017.07.001
       
  • Characterization of the high calcium fly ash geopolymer mortar with
           hot-weather curing systems for sustainable application
    • Authors: Prinya Chindaprasirt; Ubolluk Rattanasak
      Abstract: Publication date: Available online 11 July 2017
      Source:Advanced Powder Technology
      Author(s): Prinya Chindaprasirt, Ubolluk Rattanasak
      Fly ash geopolymers are an alumino-silicate material and thus enable the utilization of waste containing alumino-silicate effectively. Geopolymeric reaction occurs as a result of the activation of fly ash with alkali solutions. In Thailand, a large amount of high calcium fly ash is available due to the use of low grade lignite coal feedstock for pulverized coal combustion process and the calcium content becomes very high. In this study, heat curing at 35°C as a representative of a high ambient temperature (hot weather) and low cost was investigated. Curing at temperature of 65°C and room temperature of 25°C were also conducted to compare the results. Geopolymeric products were tested for compressive strength and characterized by XRD, IR, SEM and TGA techniques. The results showed that heat curing enhanced the geopolymerization resulting in the formation of SiOAl network product. Heat curings at 35°C and 65°C led to the formation of calcium silicate hydrate (C-S-H) and alumino-silicate (geopolymer bonding). Without heat curing, the product was predominantly C-S-H compound and the matrix was as strong as the heat-cured product. The immersion of samples in 3% sulfuric acid solution revealed that the performance of the heat-cured samples were better than those cured at room temperature. In addition, application of research results was to produce the geopolymer brick with outdoor heat exposure of 35°C. Pedestrian pathway was demonstrated.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.013
       
  • Study on the flow properties of Ti-6Al-4V powders prepared by
           radio-frequency plasma spheroidization
    • Authors: Wen-Hou Wei; Lin-Zhi Wang; Tian Chen; Xuan-Ming Duan; Wei Li
      Abstract: Publication date: Available online 9 July 2017
      Source:Advanced Powder Technology
      Author(s): Wen-Hou Wei, Lin-Zhi Wang, Tian Chen, Xuan-Ming Duan, Wei Li
      Spherical Ti-6Al-4V powders were prepared using radio-frequency plasma spheroidization. A laser particle size analyser, a scanning electron microscope, an X-ray diffractometer and a Freeman FT4 powder rheometer were used to analyse the granulometric parameters, micro-morphologies, phase constitutions and flow properties of the raw and the spheroidized powders, respectively. The spheroidized powders exhibited an almost 100% degree of sphericity, smooth surfaces, favourable dispersion and narrow particle size distribution under appropriate plasma technological parameters. The average particle size of the spheroidized powders increased slightly as compared with that of the raw powders. In addition, the spheroidized powders exhibited higher conditioned bulk density and improved flow properties (including the dynamic flow properties, aeration, compressibility, permeability and shear properties) as compared with those of the raw powders.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.025
       
  • Properties of metakaolin based geopolymer incorporating calcium carbonate
    • Authors: A. Aboulayt; M. Riahi; M. Ouazzani Touhami; H. Hannache; M. Gomina; R. Moussa
      Abstract: Publication date: Available online 5 July 2017
      Source:Advanced Powder Technology
      Author(s): A. Aboulayt, M. Riahi, M. Ouazzani Touhami, H. Hannache, M. Gomina, R. Moussa
      An alkaline solution, thermally activated kaolinite clay and a mineral additive (calcium carbonate) were mixed with the aim to elaborate a geopolymer material with physical and mechanical properties comparable to those of classical construction materials. The starting reagents were characterized by quantitative chemical analyses (XRF), mineralogical analyses (XRD), thermal gravimetric analyses (TGA), and grain size distribution measurements. The setting of the mixture (polymerization) was implemented by measuring the evolution of the viscosity as a function of time at different temperatures. The geopolymers were synthesized at a temperature of 40°C. The investigation of the mechanical behavior reveals that these materials display acceptable characteristics: the flexural and compression strength are around 4.6 and 26MPa respectively, for an added calcium carbonate over dry matter ration up to 12% by weight. The promising results exposed in this paper show that the geopolymer formulations can be adapted for applications in construction and civil engineering structures as an alternative to conventional materials.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.022
       
  • Entropy generation in a heat exchanger working with a biological nanofluid
           considering heterogeneous particle distribution
    • Authors: Mehdi Bahiraei; Mohammad Jamshidmofid; Saeed Heshmatian
      Abstract: Publication date: Available online 5 July 2017
      Source:Advanced Powder Technology
      Author(s): Mehdi Bahiraei, Mohammad Jamshidmofid, Saeed Heshmatian
      Entropy generation rates considering particle migration are evaluated for a biologically produced nanofluid flow in a mini double-pipe heat exchanger. The nanofluid is used in tube side and hot water flows in annulus side. Silver nanoparticles synthesized through plant extract method from green tea leaves are utilized. Particle migration causes non-uniform concentration distribution, and non-uniformity intensifies by increase in Reynolds number and concentration. The results indicate that at high concentrations and Reynolds numbers, particle migration can have a great effect on entropy generation rates. For water inlet temperature of 308K, the contribution of friction in nanofluid entropy generation is much more than that of heat transfer. However, as the water inlet temperature increases to 360K, the heat transfer contribution increases such that at low Reynolds numbers, the thermal contribution exceeds the frictional one. For total heat exchanger, Bejan number is smaller than 0.2 at water inlet temperature of 308K, while Bejan number has a large value at water inlet temperature of 360K. Furthermore, entropy generation at the wall has an insignificant contribution, such that for Re =1000 and φm =1%, the total entropy generation rates for the nanofluid, wall, and water are 0.098810, 0.000133, and 0.041851W/K, respectively.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.021
       
  • Transverse bulk solid behaviour during discharge from troughed belt
           conveyors
    • Authors: Dusan Ilic; Craig A. Wheeler
      Abstract: Publication date: Available online 5 July 2017
      Source:Advanced Powder Technology
      Author(s): Dusan Ilic, Craig A. Wheeler
      Guidelines for the calculation of bulk solid material cross sectional dimensions and the influence of the belt conveyor transition length on the inclination of the trajectory at discharge are well established. However, not a great deal of research has been conducted on the influence of bulk solid material properties and conveyor belt transition geometry on the bulk solid material cross section at discharge. As such, assessment of cross section break-up associated with cohesive materials and transverse spreading of free flowing materials is missing. Conversely, the majority of discharge trajectory analysis techniques focus on analysis in a single vertical plane along the length of the belt. This paper presents an analysis of high speed conveyor discharge trajectories in three dimensions, taking into account transverse spreading of free flowing materials and shearing, or cross section discontinuity, exhibited by cohesive materials. Transverse bulk solid material behaviour and trajectory discharge is evaluated using a combination of experimental laboratory tests, a continuum mechanics approach incorporating CAD and Discrete Element Modelling (DEM). The work presented shows that bulk solid material behaviour at discharge is directly influenced by material characteristics and interactions resulting from the geometry of the belt conveyor transition zone.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.024
       
  • Experimental investigation of bubble and particle motion behaviors in a
           gas-solid fluidized bed with side wall liquid spray
    • Authors: Dongfang Hu; Guodong Han; Musango Lungu; Zhengliang Huang; Zuwei Liao; Jingdai Wang; Yongrong Yang
      Abstract: Publication date: Available online 3 July 2017
      Source:Advanced Powder Technology
      Author(s): Dongfang Hu, Guodong Han, Musango Lungu, Zhengliang Huang, Zuwei Liao, Jingdai Wang, Yongrong Yang
      Bubble and particle motion behaviors are investigated experimentally in a gas solid fluidized bed with liquid spray on the side wall. The particles used in the experiment are classified as Geldart B particles. The results reveal that when the fluid drag force is less than the liquid bridge force between particles, liquid distribute all over the bed. Bubble size increases as the increase of inter-particle force, then decreases owing to the increase of particle weight with increasing liquid flow rate. When the fluid drag force is greater than the liquid bridge force, liquid mainly distribute in the upper part of the bed. And it is difficult for the wet particles to form agglomerates. Bubble size decreases with increasing liquid flow rate due to the increasing of minimum fluidization velocity. Besides, the acoustic emission (AE) measurements illustrate that the liquid adhesion and evaporation on particles could enhance the particles motion intensity. Consequently, the bubble and particle behaviors change due to the variation in fluidized gas velocity and liquid flow rate should be seriously considered when attempting to successfully design and operate the side wall liquid spray gas solid fluidized bed.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.012
       
  • Synthesis of anode active material particles for lithium-ion batteries by
           surface modification via chemical vapor deposition and their
           electrochemical characteristics
    • Authors: Norihiro Shimoi
      Abstract: Publication date: Available online 3 July 2017
      Source:Advanced Powder Technology
      Author(s): Norihiro Shimoi
      The high capacity and optimal cycle characteristics of silicon render it essential in lithium-ion batteries. We have attempted to realize a composite material by coating individual silicon (Si) particles of μm-order diameter with a silicon oxide film to serve as an active material in the anode of a lithium-ion battery and thus improve its charge-discharge characteristics. The particles were coated using an inductively coupled plasma-chemical vapor deposition (ICP-CVD) process that realized a homogeneously coated silicon oxide film on each Si particle. The film was synthesized using tetraethyl orthosilicate (TEOS) with hydrogen (H2) gas used as a reducing agent to deoxidize the silicon dioxide. This enabled the control of the silicon oxidation number in the layers produced by adjusting the H2 flow during the silicon oxide deposition by ICP-CVD. The silicon oxide covering the Si particles included both silicon monoxide and suboxide, which served to improve the charge-discharge characteristics. We succeeded in realizing an active material using Si, which is abundant in nature, for the anode of a lithium-ion battery with highly charged, improved cycle properties.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.018
       
  • Fabrication and anisotropic electronic property for oriented
           Li1+x−yNb1−x−3yTix+4yO3 solid solution by slip casting in a high
           magnetic field
    • Authors: Hiromi Nakano; Shohei Furuya; Motohiro Yuasa; Tohru S. Suzuki; Hitoshi Ohsato
      Abstract: Publication date: Available online 3 July 2017
      Source:Advanced Powder Technology
      Author(s): Hiromi Nakano, Shohei Furuya, Motohiro Yuasa, Tohru S. Suzuki, Hitoshi Ohsato
      The Li1+ x − y Nb1− x −3 y Ti x +4 y O3 (0.06≤ x ≤0.33, 0≤ y ≤0.09) (hereafter LNT), forms a unique and periodical structure in the Li2O-Nb2O5-TiO2 ternary system. In this work, toward application of the unique qualities of an electro-ceramic, we fabricated oriented LNT balk ceramics by slip casting in a strong magnetic field of 12 T using various sizes of particles. The c-axis of the LNT powders was aligned parallel to the magnetic field. As a result, we found anisotropic- and unique- electric properties which were caused by a superstructure with intergrowth layers of corundum-type [Ti2O3]2+. The Qf value parallel to the c-axis was about five times greater than that of perpendicular to the c-axis. We first clarified the mechanism showing that the anisotropic Qf value was caused by the anisotropic electron conductivity and the anisotropic bonding strength in the superstructure.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.020
       
  • Dispersion of clusters of nanoscale silica particles using batch
           rotor-stators
    • Authors: Shah Waez Kamaly; Alan C. Tarleton; Nerime Gül Özcan-Taşkın
      Abstract: Publication date: Available online 3 July 2017
      Source:Advanced Powder Technology
      Author(s): Shah Waez Kamaly, Alan C. Tarleton, Nerime Gül Özcan-Taşkın
      Nanoparticle powders added into a liquid medium form structures which are much larger than the primary particle size (aggregates and agglomerates)-typically of the order of 10’s of microns. An important process step is therefore the deagglomeration of these clusters to achieve as fine a dispersion as possible. This paper reports the findings of a study on the dispersion of hydrophilic fumed silica nanoparticle clusters, Aerosil 200V, in water using two batch rotor-stators: MICCRA D-9 and VMI. The MICCRA D-9 head consists of a set of teeth for the stator and another for the rotor, whereas the VMI has a stator with slots and a rotor which consists of a 4-bladed impeller attached to an outer set of teeth. The dispersion process, studied at different power input values and over a range of concentrations (1, 5, 10wt.%), was monitored through the evolution of PSD. Erosion was found to be the dominant breakage mechanism irrespective of operating conditions or rotor-stator type. The smallest attainable size was also found to be independent of the power input or the design of the rotor-stator. Break up kinetics increased upon the increase of power input, and this also depended on the rotor-stator design. With MICCRA D-9 which has smaller openings on both the stator and rotor, the break up rate was faster. Increasing the particle concentration decreased break up kinetics. It could also be shown that operating at high concentrations can still be beneficial as the break up rate is higher when assessed on the basis of specific power input per mass of solids.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.017
       
  • Highly dispersible and uniform size Cu2ZnSnS4 nanoparticles for
           photocatalytic application
    • Authors: Mohd Zubair Ansari; Mohd Faraz; Sandeep Munjal; Vikram Kumar; Neeraj Khare
      Abstract: Publication date: Available online 3 July 2017
      Source:Advanced Powder Technology
      Author(s): Mohd Zubair Ansari, Mohd Faraz, Sandeep Munjal, Vikram Kumar, Neeraj Khare
      Highly dispersible, uniform size (∼7nm) single-phase Cu2ZnSnS4 nanoparticles have been synthesized by hydrothermal method using non-toxic surfactant (oleic acid). High resolution transmission electron microscopy image indicates good crystallinity of the Cu2ZnSnS4 nanoparticles with the growth along (112) plane. X-ray photoelectron spectroscopy analyses suggested that the formation of with Cu, Zn, and Sn in +1, +2 and +4 oxidation states. The optical absorption spectrum of Cu2ZnSnS4 nanoparticles exhibits an absorption in the visible region and its optical band gap was found to be ∼1.72eV, which could be much more appropriate for photocatalytic application under visible light irradiation. These Cu2ZnSnS4 nanoparticles have been shown high photocatalytic degradation activity of methylene blue (MB) dye in the presence of visible light irradiation. The rate constant (k) value of Cu2ZnSnS4 nanoparticles is found to be 0.0144min−1. We have discussed the mechanism of dye degradation process that drives the photocatalytic degradation process. The reusability of the Cu2ZnSnS4 nanoparticles for the dye degradation is also demonstrated.
      Graphical abstract image

      PubDate: 2017-07-12T01:35:10Z
      DOI: 10.1016/j.apt.2017.06.023
       
  • Inside Front Cover (Aims &amp; Scope, Editors)
    • Abstract: Publication date: August 2017
      Source:Advanced Powder Technology, Volume 28, Issue 8


      PubDate: 2017-06-12T08:30:57Z
       
  • Full title (Editorial Board Members)
    • Abstract: Publication date: August 2017
      Source:Advanced Powder Technology, Volume 28, Issue 8


      PubDate: 2017-06-12T08:30:57Z
       
 
 
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