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

Sellappan, Pathikumar and Jayaram, Vikram 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.

Full text available as:

PDF Download (545Kb)

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:	Journal 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)
Division/Department:	Other, Other, Other, Materials Science Division
Depositing User:	M/S ICAST NAL
Date Deposited:	18 Jul 2008
Last Modified:	17 Jun 2010 13:44
URI:	http://nal-ir.nal.res.in/id/eprint/4878

Actions (login required)

View Item