Combustion synthesis of fine particle rare earth orthoaluminates and yttrium aluminum garnet

Kingsley, JJ and Suresh, K and Patil, KC (1990) Combustion synthesis of fine particle rare earth orthoaluminates and yttrium aluminum garnet. In: Journal of Solid State Chemistry, 88 (2). pp. 435-442.

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Abstract

Fine particle rare earth orthoaluminates, $LnAlO_3$, where $Ln = La, Pr, Nd, Sm, Gd, Tb$, and $Dy$, and yttrium aluminum garnet, $Y_3Al_5O_{12}$ (YAG), have been prepared by a novel combustion process using corresponding rare earth nitrate, aluminum nitrate, and urea/carbohydrazide mixtures. A saturated aqueous solution of the mixture when rapidly heated at $500^0C$ foams and ignites to yield voluminous, crystalline single phase rare earth orthoaluminates in less than 5 min. The solid combustion products were characterized by XRD, SEM, TEM, particle size analysis, and surface area measurements. Rare earth orthoaluminates obtained have $3-4 m^2/g$ surface area, with particle size in the range of $0.1-0.6\mu m$ and an average agglomerate size of $4-5\mu m$.

Item Type:	Journal Article
Publication:	Journal of Solid State Chemistry
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	11 Feb 2008
Last Modified:	19 Sep 2010 04:42
URI:	http://eprints.iisc.ac.in/id/eprint/12962

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