Particle Size Analysis of the Synthesized Al₂O₃ by Dissolution and Alkali Fusion-Coprecipitation Methods

Abstract:

Particle size analysis of synthesized Al₂O₃ by dissolution and alkali fusion-coprecipitation methods has been conducted. The formation of nano- or microparticles can be synthesized by the top-down (physically) and bottom-up (chemically) methods. In this study, the commercial alumina (Merck) with the particle size of 63 µm was synthesized through the bottom-up method. The dissolution method was done by reacting to alumina with ammonium hydroxide (NH₄OH). The alkali fusion method was carried out by reacting alumina with sodium hydroxide (NaOH) and it obtained by coprecipitation of the alkali fusion product with HCl and NH₄OH. The result from both methods were calcined at 600°C. The phase of synthesized Al₂O₃ was identified by using X-ray diffraction (XRD), whereas the morphology observed using a transmission electron microscope (TEM), and the particle sizes measured by particle sizes analyzer (PSA). The XRD pattern shows the γ-Al₂O₃ phases with particle sizes of ~33 nm and ~25 nm from TEM observations, while the PSA results revealed agglomerated particles with particle sizes of 1263 nm and 477 nm for the dissolution and alkali fusion-coprecipitation method, respectively. Therefore, both methods can be used to reduce the particle size of γ-Al₂O₃.

• Periodical: Key Engineering Materials (Volume 860)
• Pages: 128-134
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.860.128
• Online since: August 2020
• Authors: Cahyaning Fajar Kresna Murti, Malik Anjelh Baqiya, Endarko Endarko, Triwikantoro Triwikantoro*
• Keywords: Alkali Fusion, Alumina, Dissolution, Particle Size

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