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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Erfan Handoko
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Astronomy Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Other

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Phase Composition and Magnetic Behaviour of Iron Sand from Syiah Kuala Beach Prepared by Mechanical Alloying Zulkarnain Jalil; Eva Novita Sari; Ismail A B; Erfan Handoko
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): IJAP Volume 04 Issue 01 Year 2014
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1180

Abstract

It has recently been investigated that ball milling can improve the magnetic properties of natural iron sand significantly. In this work, we present the phase composition and magnetic behavior of iron sand from Syiah Kuala Beach, Banda Aceh. Samples were prepared by mechanical alloying method using a Fritsch planetary ball mill for 20 hours. As the results, it was shown by XRD testthat Fe3O4 (magnetite) appears as the majority phase and the magnetic properties observation shown that the magnetization saturation (Ms) and remanent (Br) was decreased with the increasing of the coercivity (Hc).
Pengamatan In-Situ Tekanan dan Temperatur pada Pembentukan MgH2/Ni melalui Metode Reactive Mechanical Alloying (RMA) untuk Aplikasi Material Penyimpan Hidrogen Erfan Handoko; Aditia Pradipta; Bambang Soegijono; Zulkarnain Jalil
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 02 (2014): IJAP Volume 04 Issue 02 Year 2014
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i02.4982

Abstract

The observation on reactive mechanical alloying (RMA) process had been done to form MgH2 material with adding Ni nanoparticles as catalist for hydrogen storage material applications. Pressure and temperature of material forming were recorded by microcontroller set for 30 minutes. Mg with adding Ni 5 wt % was milled by High Energy Ball Mill (HEBM) at H2 atmosphere in 1 atm of pressure. The measurement results showed that the pressure had been changed and temperature also changes up to 38oC. This process proves that the alloying betwen Mg and H2 had been formed. The X-ray diffraction pattern identify MgH2 phase. SEM image showed the morphology of MgH2 particles.
EFEK PERLAKUAN PANAS LARUTAN PREKURSOR PADA PROSES PENUMBUHAN ZnO NANORODS Desy Mekarsari; Iwan Sugihartono; Erfan Handoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 8 (2019): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2019
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.061 KB) | DOI: 10.21009/03.SNF2019.02.PA.21

Abstract

Teknik penumbuhan ZnO nanorods dilakukan menggunakan dua tahap, yaitu tahap deposisi lapisan benih dan penumbuhan nanorods. Deposisi lapisan benih dilakukan menggunakan teknik ultrasonic nebulizer 1.7 MHz dan penumbuhan nanorods menggunakan teknik hidrotermal pada suhu 95 oC selama 2 jam. Fokus penelitian ini adalah mengamati pengaruh perlakuan panas larutan prekursor pada penumbuhan ZnO nanorods. Morfologi ZnO nanorods akan diamati menggunakan scanning electron microscopy (SEM) dan analisis komposisi menggunakan EDX. Hasil pengamatan mengkonfirmasi ZnO nanorods tumbuh di atas substrat dengan orientasi acak dan ukuran diameter yang bervariasi. Pengujian komposisi ZnO nanorods dilakukan menggunakan energy dispersive x-ray (EDX) memberikan konfirmasi jumlah elemen Zn yang memiliki komposisi paling besar dibandingkan dengan elemen lainnya. ZnO nanorods grown technique with two steps, namely seed layer deposition and nanorods grown. Seed layer deposition by ultrasonic nebulizer 1.7 MHz and ZnO nanorods were grown by hydrothermal at 95 oC for two hours. The focus of this research is to observe the effect of heat treatment of precursor solutions on the growth of ZnO nanorods. The morfology of ZnO nanorods will be observed with scanning electron microscopy (SEM) and composition analysis with EDX. The results confirm the ZnO nanorods growing on the substrate with random orientation and varying diameter sizes. ZnO nanorods composition testing performed using dispersive x-ray energy (EDX) confirmed the number of Zn elements that have the greatest composition compared to other elements.
PENGARUH POSISI SUBSTRAT PADA ZnO NANORODS YANG DITUMBUHKAN MENGGUNAKAN TEKNIK HIDROTERMAL Anggie Anastasya; Iwan Sugihartono; Erfan Handoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 8 (2019): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2019
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (271.638 KB) | DOI: 10.21009/03.SNF2019.02.PA.24

Abstract

Teknik penumbuhan ZnO nanorods dilakukan menggunakan dua tahap, yaitu tahap deposisi lapisan benih dan penumbuhan nanorods. Deposisi lapisan benih dilakukan menggunakan teknik ultrasonic nebulizer dan penumbuhan nanorods menggunakan teknik hidrotermal pada suhu 95 °C selama 2 jam. Fokus penelitian ini adalah mengamati pengaruh variasi posisi terhadap ZnO nanorods. Morfologi ZnO nanorods akan diamati menggunakan scanning electron microscopy (SEM) dan analisis komposisi menggunakan EDAX. Hasil pengamatan menunjukan bahwa ZnO nanorods yang terbentuk memiliki orientasi acak, tidak vertical, dan dimensi yang bervariasi di atas substrat. The growth techinque of ZnO nanorods was carried out using two stages, namely the seed layer deposition stage and the growth of nanorods. Seed layer deposition was carried out using the ultrasonic nebulizer technique and nebulizer technique and the growth of nanorods using hydrothermal technique at 95 °C for 2 hours. The focus of this study is to observe the effect of position variations on ZnO nanorods. Morphology of ZnO nanorods will be observed using Scanning Electron Microscopy (SEM) and composition analysis using EDAX. The results of the observation show that the ZnO nanorods formed have a random orientation, not vertical, and varying dimensions on the substrate.
Co-Authors Aditia Pradipta Anggie Anastasya Bambang Soegijono Desy Mekarsari Eva Novita Sari Ismail A B Iwan Sugihartono Zulkarnain Jalil