Sol gel synthesis for preparation of yttrium aluminium garnet

Abstract

Sol-gel—synthesis for preparation of pure yttrium aluminium garnet powder with small grain size is subject of this ongoing study. Starting materials were sulfates and chlorides of yttrium and aluminium. To obtain pure YAG (Y3A1SO1Z) pH during hydrolysis as well as temperature during calcination and conversion into YAG must be carefully chosen. Presence of water has an adverse effect on the degree of agglomeration. To avoid this the influence of dispersion liquids was studied and this led to optimized conditions for precipitation. Sintering behaviour is discussed