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Hot Water Hydrolysis: Controlled Precipitation and the Preparation of Nano Alumina, Spherical α Alumina Powder

[+] Author Affiliations
M. Thiruchitrambalam

Anna University, Tamil Nadu, India

V. R. Palkar

Tata Institute of Fundamental Research, Mumbai, India

Paper No. ESDA2006-95680, pp. 1015-1024; 10 pages
doi:10.1115/ESDA2006-95680
From:
  • ASME 8th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 2: Automotive Systems, Bioengineering and Biomedical Technology, Fluids Engineering, Maintenance Engineering and Non-Destructive Evaluation, and Nanotechnology
  • Torino, Italy, July 4–7, 2006
  • ISBN: 0-7918-4249-5 | eISBN: 0-7918-3779-3
  • Copyright © 2006 by ASME

abstract

Aluminium metal has been hydrolyzed in hot aqueous-glycerol media composed of various volume % of glycerol. After hydrolysis in the aqueous-glycerol media, the product i.e., precipitate was aged at room temperature and the ageing medium was diluted periodically. The precipitation and ageing media has influenced the phase composition and morphology of the hydroxides significantly. The morphology of the hydroxide and α alumina powders were examined using TEM and SEM respectively. It has been found that the crystallinity and morphology of hydroxide influenced the morphology of α alumina, importantly the hydroxide powder prepared using 25 % aqueous-glycerol medium, upon calcination yielded spherical α lumina powder.

Copyright © 2006 by ASME

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