# 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°C 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 m2/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 Copyright of this article belongs to Academic Press, Inc. Combustion synthesis Division of Chemical Sciences > Inorganic & Physical Chemistry CA Sharada 04 Feb 2008 19 Sep 2010 04:41 http://eprints.iisc.ac.in/id/eprint/12615