Synthesis and Characterization of Alumina Precursors Derived from Aluminum Metal through Electrochemical Method

https://doi.org/10.22146/ijc.21205

Eva Marlina Ginting(1*), Nurdin Bukit(2)

(1) Department of Physics, Faculty of Mathematics and Natural Sciences ,University State of Medan, Jl. Williem Iskandar Psr V, Medan 20221
(2) Department of Physics, Faculty of Mathematics and Natural Sciences ,University State of Medan, Jl. Williem Iskandar Psr V, Medan 20221
(*) Corresponding Author

Abstract


This study investigated the use of the electrochemical method to prepare alumina (a-Al2O3) from aluminum metal. The a-Al2O3 precursor was calcined at 110 °C for six hours and then characterized using Fourier Transform Infrared (FTIR) spectroscopy, Particle Size Analysis (PSA), X-Ray Diffraction spectroscopy (XRD), and Scanning Electron Microscopy (SEM). To study transformation of the precursor into α-Al2O3, three samples were sintered at 400, 800, and 1200 °C, respectively and they were characterized. The most interesting result obtained was the transition of AlOOH and β-Al(OH)3 into γ-Al2O3 at low temperatures (400 to 800°C), followed by transformation of γ-Al2O3 into a-Al2O3 at high temperature (1200 °C). The overall results obtained demonstrated that electrochemical method is a potential alternative for production of α-Al2O3, which can be achieved in practically pure phase at sintering temperature at 1200 °C.

Keywords


alumina; electrochemical; sintering; structure; microstructure

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DOI: https://doi.org/10.22146/ijc.21205

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Indonesian Journal of Chemisty (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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