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JPSE (Journal of Physical Science and Engineering)
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2541-2485
Published by Universitas Negeri Malang Homepage  [35 journals]
  • Sintesis Kromium Ferit Dari Pasir Pantai dan Karakterisasi Awal Sensor
           Suhu

    • Authors: Widya Elyani, Arif Hidayat, Ahmad Taufiq, Sunaryono Sunaryono
      Pages: 1 - 7
      Abstract: Ferrofluids for temperature sensor application become one of the important modern technology applications. Therefore, the development of the beach sand-based ferrofluids for temperature sensor becomes new and essential things for cutting off their production. In this research, the preliminary investigation of the temperature sensor is developed based on the chromium ferrite ferrofluids. The sample in powder and fluid were prepared by coprecipitation-sonochemical technique.   The powder sample which was characterized by XRD has the crystallite size of 10 nm with high purity. The preliminary investigation shows that the chromium ferrite ferrofluid has a good property as a candidate for temperature sensor application showing a good response on the temperature treatment
      PubDate: 2018-04-13
      Issue No: Vol. 3, No. 1 (2018)
       
  • Investigasi Struktur dan Energi Band Gap Partikel Nano Tio2 Hasil Sintesis
           Menggunakan Metode Sol-Gel

    • Authors: Anita Listanti, Ahmad Taufiq, Arif Hidayat, Sunaryono Sunaryono
      Pages: 8 - 15
      Abstract: TiO2 is a semiconductor material that widely applied in various fields due to its superiority both in terms of physical and chemical properties. In this study, the TiO2 nanoparticles was synthesized using sol-gel method. The synthesis of TiO2 nanoparticles was started by reacted TiCl3 with aquades and titrated with ammonium hydroxide and then followed by calcination process at 600 0C for 1.5 hours. The structural characteristics were investigated using XRD. The fungsional groups of the TiO2 nanoparticles were characterized by FTIR. The optical properties of the TiO2 nanoparticles were determined using UV-Vis spectrometer. The morphology of the sample was characterized using SEM. The results show that the TiO2 has structure as anatase phase. The data analysis using the Scherrer’s equation show that the particle crystallite size of is about of 9.77 nm. The energy band gap value of the TiO2 is 3.28 eV. Based on the SEM image, the agglomeration of the sample was formed with the average diameter of particle size of TiO2 is about 92 nm.
      PubDate: 2018-04-13
      Issue No: Vol. 3, No. 1 (2018)
       
  • Sintesis, Karakterisasi Struktur dan Sifat Optik Nanopartikel
           Hidroksiapatit/Magnetit

    • Authors: Yuanita Amalia Hariyanto, Ahmad Taufiq, Sunaryono Sunaryono
      Pages: 16 - 24
      Abstract: Hydroxyapatite becomes one of the promising biomaterials to be applied in medical fields due to its special performances such as biocompatible and non-toxic. So that it to improve performance of hydroxyapatite, it is necessary to develop the hydroxyapatite by compositing with magnetite. In this work, the hydroxyapatite/magnetite was synthesized using precipitated method and characterized using XRD, FTIR, SEM-EDAX, and UV-Vis spectrometer for investigating the detailed structure, functional group, morphology, and band gap energy of the prepared sample. The results show that the sample has two phases with high purity i.e. hydroxyapatite and magnetite without any impurities. The data analysis using the Scherrer’s equation shows that the hydroxyapatite/magnetite has particle size about 10 nm. Meanwhile, the data analysis using FTIR indicates the presence of atomic bond from both of hydroxyapatite and magnetite. Morphologically, it is seen that the sample has an agglomeration in the nanometric size. Interestingly, the hydroxyapatite/magnetite has a band gap energy of about 3.8 eV which is in the range of the band gap energy of hydroxyapatite and magnetite.
      PubDate: 2018-04-14
      Issue No: Vol. 3, No. 1 (2018)
       
  • Integrasi Pengembangan Techno Park dan Mitigasi Bencana Daerah Volcano
           Hosted Geothermal Cangar, Arjuno-Welirang Berbasis Metode Seismik

    • Authors: Sukir Maryanto
      Pages: 25 - 31
      Abstract: Telah dilakukan integrasi konsep pengembangan Techno Park dan Mitigasi Bencana pada kawasan Volcano Hosted Geothermal dengan berdasar pada metode seismik. Pada tahap awal dilakukan survey mikroseismik dengan analisis pergerakan partikel. Tujuannya untuk mengetahui sebaran episenter dan hiposenter gempa bumi mikro yang berubah secara spatio- temporal dan sebaran nilai Peak Ground Acceleration (PGA) yang dihitung menggunakan metode Kanai. Akuisisi data dilakukan di dua lokasi (Tretes dan Cangar) tempat pengembangan Techno Park dan observatorium Gunungapi dan Geothermal menggunakan seismograf TDL-303S dan juga dikembangkan homemade seismometer berbasis MEMS. Hasil penelitian didapatkan rentang frekuensi gempa bumi mikro berkisar 12-24 Hz. Terdiri atas 34 event tersebar di sekitar Daerah Cangar dengan rentang kedalaman 4-262 meter, serta 6 event di sekitar Kawah Welirang dengan rentang kedalaman 985-2152 meter. Sumber event di sekitar kawah diduga sebagai akibat aktivitas vulkanik Kawah Welirang. Nilai Sebaran nilai PGA di Daerah Cangar berkisar 11,23 gal hingga 21,8 gal. Sedangkan, di Daerah Tretes berkisar 5,93 gal hingga 18,87 gal. Rentang nilai tersebut menunjukkan tingkat risiko akibat gempa tektonik pada daerah penelitian termasuk kategori aman, sehingga layak untuk pengembangan daerah monitoring erupsi gunungapi Arjuno Welirang
      PubDate: 2018-05-22
      Issue No: Vol. 3, No. 1 (2018)
       
  • Uji Kekerasan Functionally Graded Materials Berbasis Aluminium Titanat
           dengan Penstabil MgO

    • Authors: Ah Sulhan Fauzi, Hesti Istiqlaliyah, Suminar Pratapa
      Pages: 32 - 37
      Abstract: Penelitian ini dilakukan untuk mengetahui karakteristik kekerasan functionally graded materials berbasis aluminium titanat yang distabilisasi magnesium oksida (FGMs-ATM) yang telah dibuat dengan metode infiltrasi berulang. Uji kekerasan dilakukan pada arah uniaksial untuk membandingkan nilai kekerasan sampel dengan variasi beban 0,2 sampai 1 Newton. Untuk membentuk FGMs-ATM, sampel disinter pada temperatur 1550 °C, sebagai pembanding adalah FGMs-ATM yang disinter pada temperatur 1450 °C. Hasil analisis sifat kekerasan dengan uji Vickers Hardness menunjukkan nilai kekerasan FGMs-ATM yang fluktuatif terhadap variasi beban antara 0,2 N sampai dengan 1 N, yaitu 64,55 HV pada pembebanan terendah 0,5 N dan tertinggi 118,6 HV pada pembebanan tertinggi 1 N. Fluktuasi nilai kekerasan terhadap variasi beban yang diberikan menunjukkan sampel FGMs-ATM mendekati sifat getas/ rapuh (brittle). Sedangkan peningkatan temperatur sinter semakin menurunkan sifat getasnya.
      PubDate: 2018-08-30
      Issue No: Vol. 3, No. 1 (2018)
       
 
 
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