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All Journal JURNAL PERSPEKTIF PENDIDIKAN Metalurgi
Tri Arini
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Education Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH TEMPERATUR NUKLEASI TERHADAP GEOMETRI PRODUK MAGNESIUM KARBONAT DARI BAHAN BAKU DOLOMIT MADURA[Effect of Temperature on The Geometric Product Nucleation Magnesium Carbonate of Raw Materials Dolomite Madura] Solihin Solihin; Tri Arini; Eni Febriana
Metalurgi Vol 28, No 2 (2013): Metalurgi Vol.28 No.2 Agustus 2013
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.451 KB) | DOI: 10.14203/metalurgi.v28i2.249

Abstract

The Effect of Voltage and Time In Synthesis Manganese Dioxide from Manganese Sulfate Precursor Eka Fitri Wulandari; Lia Andriyah; Soesaptri Oediyani; Latifa hanum Lalasari; Tri Arini; Nadia Chrisayu Natasha; Fariza Eka Yunita; Ariyo Suharyanto; Eko Sulistiyono
Metalurgi Vol 37, No 1 (2022): Metalurgi Vol. 37 No. 1 April 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (582.192 KB) | DOI: 10.14203/metalurgi.v37i1.599

Abstract

The utilization of manganese dioxide (MnO2) as a cathode material for lithium-ion battery has attract many attentions because of their excellent electrochemical properties which have high theoretical storage capacity of 615 mAh/g. In this study, synthesis of MnO2 was carried out from manganese sulfate (MnSO4) precursor which is a pregnant leach solution from the leaching process of manganese ore from Trenggalek Regency. The electrolysis method has been used in this synthesis of MnO2 in an electrochemical cell consisting of two graphite electrodes with dimensions (16 x 5 x 0,3) cm. The purpose of this study is to determine the effect of voltage and time to particles amount of MnO2, to determine the phase and crystal structure of MnO2 and its morphological microstructure. The electrolysis process was carried out in 2000 ml of MnSO4 solution under constant stirring at 60oC with DC voltage varied by 2, 4, 6 and 8 volt and time varied by 4, 8, 12 and 16 hours. The precipitates formed at anode were separated, then the particles were dried at 110oC for 2 hours. The main contain of MnO2 were analyzed by X-Ray Fluorescence (XRF), the phase and crystal structure were evaluated by X-Ray Diffraction (XRD) and the morphological microstructure were captured by Scanning Electron Microscope (SEM). The results revealed that the highest particles amount of MnO2 is 31,63 grams which is electrolyzed at 8 volts for 16 hours. The highest purity of MnO2 is 89,23% which is electrolyzed at 2 volts for 16 hours. The particles produced were α-MnO2 with a tetragonal crystal system and nearly spherical in shape with size particles ranged from 136,01-202,48 and 144-352 nm.
Pembuatan Magnesium Karbonat Berukuran Ultra Halus Bagian 1. Perilaku Kalsinasi Dolomit Indonesia[SYNTHESIS OF ULTRA FINE GRAIN MAGNESIUM CARBONATE PART 1. CALCINATION BEHAVIOUR OF INDONESIAN DOLOMITE] Solihin Solihin; Tri Arini; Eni Febriana
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.231 KB) | DOI: 10.14203/metalurgi.v27i3.237

Abstract

PENGEMBANGAN KOMIK FISIKA BERBASIS SAINTIFIK MATERI GELOMBANG BUNYI UNTUK MENINGKATKAN HASIL BELAJAR SISWA KELAS XI MAN 1 (MODEL) LUBUKLINGGAU Anggun Ari Aditia Utami; Wahyu Arini; Tri Arini
Jurnal Perspektif Pendidikan Vol 17 No 1 (2023): Jurnal Perspektif Pendidikan Vol 17 No 1 Juni 2023
Publisher : LP4MK STKIP PGRI Lubuklinggau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31540/jpp.v17i1.2213

Abstract

This development research aims to (1) determine the quality of science-based physics comics on sound wave material and (2) improve students' physics learning outcomes after participating in learning activities using scientific-based physics comics on sound wave material. This research is a development research using a 4D model. The subjects of this study included students of class XI MIPA 2 MAN 1 Lubuklinggau. Data collection techniques were carried out using validation sheets and learning achievement tests. Based on the results of validation by material experts of 0.95; media experts at 0.89; and linguists at 0.87. Thus scientific-based physics comics are appropriate for use in classroom learning activities. And the results of the analysis of increasing student learning outcomes through questions with pretest and posttest learning outcomes tests. Increased mastery of physics material after students use scientific-based physics comics developed after being analyzed with a Gain Score score of 0.79 is included in the very high category. Based on the research data obtained, it can be concluded that science-based physics comics on sound waves for class XI developed by researchers are declared valid and can improve student learning outcomes so that they can be used in learning activities.
Co-Authors Anggun Ari Aditia Utami Ariyo Suharyanto Eka Fitri Wulandari Eko Sulistiyono Eni Febriana Fariza Eka Yunita Latifa Hanum Lalasari Lia Andriyah Nadia Chrisayu Natasha Soesaptri Oediyani Solihin Solihin Wahyu Arini