SYNTHESIS AND CHARACTERIZATION OF ALUMINA PRECURSORS DERIVED FROM ALUMINUM METAL THROUGH ELECTROCHEMICAL METHOD

Ginting, Eva Marlina and Bukit, Nurdin (2015) SYNTHESIS AND CHARACTERIZATION OF ALUMINA PRECURSORS DERIVED FROM ALUMINUM METAL THROUGH ELECTROCHEMICAL METHOD. Indonesian Journal of Chemistry, 15 (02). ISSN 1411-9420

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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.

Item Type: Article
Keywords: Alumina; Electrochemical; Sintering; Structure; Microstructure
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC120 Descriptive and Experimental mechanics
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Fisika
Depositing User: Mrs Harly Christy Siagian
Date Deposited: 04 Jan 2017 08:26
URI: http://digilib.unimed.ac.id/id/eprint/22508

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