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All Journal Journal of Aceh Physics Society International Journal of Engineering, Science and Information Technology Chemical Engineering Journal Storage (CEJS) Jurnal Natural Jurnal Malikussaleh Mengabdi Jurnal Solusi Masyarakat Dikara
Nurmalita Nurmalita
Physics Department, Faculty Of Mathematics And Natural Sciences, Syiah Kuala University
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Neuroscience Physics Social Sciences Transportation Other

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Journal : Journal of Aceh Physics Society

 1 
The Effect of Sintering Time on Surface Morfology of Pb-Doped Bi-2223 Oxides Superconductors Prepared by the Solid State Reaction Methods at 840 oC Yufita, Evi; ., Nurmalita
Journal of Aceh Physics Society Volume 5 2016
Publisher : Aceh Physics Society

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Abstract

This study was investigating the effect of sintering time (30 h, 32 h, and 34 h) on surface morphology of Pb-doped Bi-2223 oxides of superconductors prepared by the solid-state reaction method at 840 oC. The superconductor was characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).  In the present study, phase purity, volume fraction, surface morphology, texturing, crystallinity, grain connectivity and grain size of the bulk samples are found and compared with each other. The enhancement in the sintering time is confirmed that it will decrease Bi-2223 phase fraction and increase the impurity of the samples. SEM images shows that the sample has the best crystallinity, grain connectivity and largest grain size. Based on the present results, it is conclude that the surface morphological is improving with the increasing of the sintering time.
Heat Energy of Candlenut Shell and Tamarind Skin Briquet with Variation on Particle Size and Pressure Pressing Cut Dewi Afriani; Evi Yufita; Nurmalita Nurmalita
Journal of Aceh Physics Society Volume 6 Number 1, March 2017
Publisher : PSI-Aceh

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Abstract

Pemanfaatan limbah dari hasil perkebunan dapat digunakankan untuk pembuatan briket bioarang yang energinya dapat diperoleh sebagi energi alternatif. Pada penelitian ini dilakukan pembuatan briket bioarang campuran antara limbah tempurung kemiri dan kulit asam jawa dengan memvariasikan tekanan pengepresan (4 ton, 5 ton, 6 ton) dan ukuran partikel dari cangkang kemiri (20 mesh, 40 mesh, 60 mesh) untuk mengetahui kualitas briket yang dihasilkan. Hasil penelitian menunjukkan bawa nilai kalor briket bioarang tertinggi berada pada tekanan pengepresan 6 ton dengan ukuran butir 60 mesh sebesar 3350 kal dengan porositas sebesar 5,58 % dan kadar air sebesar 7,6 %. Farm waste utilization can be done by making a briquet as an alternative energy. In this research mixture of waste candlenut shell and tamarind skin as a briquet is studied by varying the pressure pressing (4 tons, 5 tons, 6 tons) and grain size of the candlenut shell (20 mesh, 40 mesh, 60 mesh) to determine the quality of briquettes resulting from. The results show that the highest heat energy of briquet currently on the pressing pressure of 6 tons with a grain size of 60 mesh at 3350 cal with a porosity of 5.58% and a water content of 7.6%. Keywords: briket bioarang, tempurung kemiri, kulit asam jawa, tekanan pengepresan, ukuran butir
Co-Authors Adi Setiawan Ahmad Fikri Ahmad Nayan Alchalil Alchalil AR, Marzuki Br. Simajuntak, Ochitria Cintia Cut Dewi Afriani Deassy Siska Evi Yufita Faisal Faisal Fauzi Fauzi Fazira, Zetta Fibarzi, Wiza Ulfa Frandica, Dandy Haykal, Muhammad Heikal, Mohammad Ishak Ishak Jalaluddin Jalaluddin Kamar, Iqbal Karim, Firman Masrullita, Masrullita Muhammad Daud Muhammad Yusuf Nailul Amani Nasution, Ichsan Alwi Novi Sylvia Saragih, Tamara Habibi Siregar, Umar Ramadhan Sitorus, Sarifah Sofyan Sofyan Sulhatun Sulhatun Suryati Suryati Ulfa, Raudhatul Zainuddin Ginting