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All Journal Jurnal Teknik Mesin Rotasi Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Sains Materi Indonesia Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir Teknika: Jurnal Sains dan Teknologi Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Kimia dan Kemasan PROSIDING SEMINAR NASIONAL CENDEKIAWAN Indonesian Journal of Chemistry Metalurgi Indonesian Physical Review Jurnal Metalurgi dan Material Indonesia ADI Journal on Recent Innovation (AJRI) Teknomekanik JURNAL FLYWHEEL Makara Journal of Science Journal of Fibers and Polymer Composites Metalurgi
Anne Zulfia
1Departemen Metalurgi Dan Material, Fakultas Teknik Universitas Indonesia, Jakarta
Religion Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : Metalurgi

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Studi Pelapisan Komposit Ni-P-Nano Al2O3 Dengan Metode Electroless Co-Deposition [Study of Ni-P-Nano Al2O3 Composite Coating With Electroless Co-Deposition Methode] Yulinda Lestari; Effendi Mabruri; Anne Zulfia Syahrial
Metalurgi Vol 31, No 1 (2016): Metalurgi Vol. 31 No. 1 April 2016
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1358.178 KB) | DOI: 10.14203/metalurgi.v31i1.96

Abstract

The Ni-P-nano powder Al2O3 composite coating have been prepared by electroless codeposition method. It has advantage that the process does not require an electrode, fast deposition rate, good corrosion and wear resistance. In this study, the variable parameters are the addition of nano powder Al2O3 composition. The aim of this research is to determine microstructure phenomenon, phase and crystalinity, chemical composition and distribution on coating surface, and corrosivity Ni-P-nano powder Al2O3 composite coating.The substrate is used stainless steel 410. Substrates have been pre treated in order to activate the surface. Then, substrate immersed in solution that consisting of nickel sulfate, sodium hypophosphite, ammonium sulfate, sodium acetate, lead acetate and nano alumina powder. The substrate is immersed about 60 minutes at a 90±2 °C temperature with speed of 150 rpm. Sample characterization has done by SEM-EDS, XRD, and CMS. Results indicate there is a microstructure visual difference before and after electroless coating process.Based on variable experiment, the optimum nanopowder Al2O3 compositionis 10 gr/l which have given the best paticle distribution and most excellent corrosion resistance.AbstrakPelapisan material dengan komposit Ni-P-nano powder Al2O3 yang menggunakan metode electroless kodeposisi memiliki keunggulan yaitu prosesnya tidak membutuhkan elektroda, laju deposisi yang cepat danmemiliki ketahanan korosi dan ketahanan aus yang baik. Pada penelitian ini, parameter yang divariasikan adalah komposisi penambahan nano powder Al2O3. Penelitian ini bertujuan untuk mengetahui fenomena struktur mikro, fasa dan kristalinitas, komposisi kimia dan distribusi unsur di permukaan coating, danketahanan korosi komposit coating Ni-P-nano powder Al2O3. Substrat yang digunakan yaitu baja tahan karat 410 dilaku awal (pretreatment) untuk mengaktivasi permukaan, kemudian direndam dalam larutan yang terdiri dari nikel sulfat, natrium hypophosphite, ammonium sulfat, sodium asetat, lead asetat dan serbuk nano alumina. Substrat direndam selama 60 menit, dalam suhu proses 90±2 °C dengan kecepatan putaran 150 rpm. Karakterisasi sampel dilakukan menggunakan alat SEM-EDS (scanning electron microscopy-energy dispersive spectroscopy), XRD (x-ray diffraction), dan CMS (corrosion measurement system). Dari hasil percobaan menunjukkan terdapat perbedaan struktur mikro antara substrat logam dasar dan substrat setelahproses electroless coating. Berdasarkan variabel percobaan, untuk komposisi nano powder Al2O3 yang optimum adalah 10 gr/l karena memberikan distribusi partikel dan ketahanan korosi yang paling baik.
Influence of Electrolyte Molarity and Applied Voltage on the Purification of Ferronickel by Electrolysis Method Astini, Vita; Meirawati, Selvia; Nengsih, Sulistia; -, Arif; -, Hasriyanti; Soedarsono, Johny Wahyuadi Mudaryoto; Zulfia, Anne
Metalurgi Vol 39, No 1 (2024): Metalurgi Vol. 39 No. 1 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.742

Abstract

The current advancements in the automotive industry highlight the critical need for electric vehicles, which require a reliable supply of nickel for battery production. A potential nickel source is Ferronickel's local content, which can be used as a secondary resource. However, research on converting smelted Ferronickel into electrolytic nickel is still limited. This study aims to examine the effects of electrolyte molarity and applied voltage during the electrolysis process for refining Ferronickel. The molarities of HCl employed in this research are 0.1, 0.25, 0.5, 0.75, and 1 M for 2 hours. Additionally, the molarities of HCl are set at 2, 3, and 4 M for 6 hours. Further experiments were performed using varying voltages of 1, 2, 4, 6, and 8 V while keeping the solution concentration constant at 1 M and maintaining an electrolysis duration of 2 hours. The electrolysis solution was subsequently analyzed using the AAS (atomic absorption spectrophotometry) test. The results indicated that higher molarity levels were associated with increased current, resulting in faster reaction rates and greater solubilization of nickel metal. The Ni concentration rose with higher molarity, increasing from 76.50 mg/L in .25 M HCl to 91.88 mg/L in 1 M HCl. In contrast, the Fe concentration remained nearly constant across various molarity levels, ranging from 11.81 mg/L in .25 M HCl to 11.95 mg/L in 1 M HCl, suggesting a minimal influence of molarity below 1 M. Fe exhibited a strong positive correlation with increasing electrolyte molarity, showing a significant rise in concentration from 49.06 g/L at 2 M to 90.17 g/L at 4 M. Ni showed a more modest response to elevated molarity, with concentrations increasing from 11.95 g/L at 2 M to 22.70 g/L at 4 M. The Ni concentration increased with the applied voltage up to 6 V, reaching 95.57 mg/L, but then decreased to 77.67 mg/L at 8 V, indicating that the optimum voltage is 6 V. The Fe concentration displayed slight fluctuations but remained relatively stable across different voltage levels, measuring 11.81 mg/L at 1 V and 12.28 mg/L at 8 V, indicating that the applied voltage does not significantly influence Fe concentration in the solution.
Optimization of NMC811 Synthesis via Oxalate Coprecipitation Method for Lithium-Ion Battery Cathode Angellinnov, Fiona; Subhan, Achmad; Priyono, Bambang; Syahrial, Anne Zulfia
Metalurgi Vol 39, No 2 (2024): Metalurgi Vol. 39 No. 2 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.759

Abstract

NMC811 was synthesized through the oxalate coprecipitation method, followed by the solid-state method of lithiation. Stirring speed (500, 750, 1000 rpm), aging time (0, 3, 5h), sintering atmosphere (with and without oxygen flow), sintering temperature (700, 750, 800 °C), and lithium concentration (0, 2, 5% excess) effect on the NMC811 were examined. Characterization results showed that the optimum stirring speed and aging time are 750 rpm and 3 hours. Based on structural analysis, the best condition for sintering is in oxygen atmospheres at 800 °C with a lithium concentration of 2% excess. NMC811, synthesized with these optimum parameters, provided a 212.93 mAh/g capacity. These findings deliver insight into NMC811 synthesis optimization.
Co-Authors Abdul Aziz Ammar Achmad Subhan Achmad Subhan Agus Pramono AGUS PURWANTO Agus Sudjatno Agus Sukarto Agus Sukarto W Ahmad Taufik Akhmad Herman Yuwono Alexey Glushshenkov Alfaruq, Subkhan Alfirano Alfirano Ali Alhamidi Angellinnov, Fiona Anistasia Milandia Apriliani, Enni Ari Uliana Arif Arif Astini, Vita Bambang Prihandoko Bambang Priyono Bambang Priyono Bambang Suharno Bintang Adjiantoro D.N. Haerani Darminto . Darminto . Dedi Supriadi Dwi Marta Nurjaya, Dwi Marta Eddy S Siradj Eddy S. Siradj Efendi Mabruri Effendi Mabruri Ekavianti Prajatelistia Evvy Kartini Evvy Kartini Evvy Kartini Evvy Kartini Evvy Kartini Evvy Kartini Fadli Robby, Fadli G.N. Anastasia Sahari Ghiska Ramahdita Hanuna Haritsah Hasriyanti Hasriyanti Heri Jodi Heri Jodi Heri Jodi, Heri I Komang Astana Widi I Nyoman Jujur Indra Gunawan Ismojo Ismojo Jarot Raharjo johansyah johansyah Johny Wahyuadi Soedarsono Juliadi Juliadi Jumari, Arif Kirman Kirman, Kirman Kirman M. Lestari, Yulinda Lilis Mariani Lilis Mariani, Lilis Luh Putu Ratna Sundari M. Zainuri Mabruri, Effendi Mario Marfelly, Mario Meirawati, Selvia Melisa Melisa Moch Ardi Dimastiar Mochamad Chalid Muhammad Wira Akira Muhammad Yunan Hasbi Myrna Ariati, Myrna Nanik Indayaningsih Nasution, Annio Indah Lestari Nengsih, Sulistia Nofrijon Sofyan, Nofrijon Nurfitrah, Aditya Eka Nurul Huda Oktaviani, Adinda Priyo Sardjono Rahmadiawan, Dieter Ratna Juwita Razak, Muhammad Abdul Rd. Panji Maulana Riva Nanda, Iksan Sahari, G.N. Anastasia Salahuddin Junus Sibut Sotya Astutiningsih Subkhan Alfaruq Sudirman Sudirman Supardi Supardi Taufik Abimanyu Taufik Abimanyu, Taufik Verina Dalam Verina Dalam, Verina Wahid Muhamad Furkon Rahmatulloh, Wahid Muhamad Furkon Wahyudianingsih Wahyudianingsih Wara Dyah Pita Rengga Wayan Sujana Widyastuti . Widyastuti Widyastuti Yudha, Cornelius Satria Yudhistira Adityawardhana Yulinda Lestari Yustinus Purwamargapratala Zainuri, M