Synthesis of bulk, dense, nanocrystalline yttrium aluminum garnet from amorphous powders

Sellappan, Pathikumar and Jayaram, V and Chokshi, Atul H and Divakar, C (2007) Synthesis of bulk, dense, nanocrystalline yttrium aluminum garnet from amorphous powders. Journal of the American Ceramic Society, 90 (11). pp. 3638-3641.

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Abstract

Amorphous powders of Al2O3x2014;37.5 mol% Y2O3 (yttrium aluminum garnet (YAG)) were prepared by coprecipitation, decomposed at 800xB0;C, and hot-pressed uniaxally at low temperature (600xB0;C) and a moderate pressure (750 MPa). Optimum conditions yielded microstructures with only 2% porosity and partial crystallization of YAG. Further processing using high quasi-hydrostatic pressure (1 GPa) at 1000xB0;C enabled the production of fully crystallized YAG with gt;96% relative density and a nanocrystalline grain size of x223C;70 nm. 13;

Item Type:	Article
Additional Information:	Copyright for this article belongs to John Wiley amp; Sons
Uncontrolled Keywords:	Nanocrystalline;Yttrium aluminum garnet;Amorphous powders
Subjects:	CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User:	M/S ICAST NAL
Date Deposited:	18 Jul 2008
Last Modified:	13 Aug 2015 07:58
URI:	http://nal-ir.nal.res.in/id/eprint/4878

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