Physicochemical characteristics of alumina gel in hydroxyhydrogel and normal form

Aluminium hydroxide as a powder precursor for making advanced ceramic materials such as yttrium aluminium garnet (YAG) was prepared from aluminium nitrate and ammonium hydroxide by two different procedures and was analyzed for determining its physico-chemical characteristics. It was observed that through the end products were essentially Al(OH)3, they differ in their physico-chemical properties. Rate constants evaluated by thermal analysis were compared and the differences observed were explained in terms of structural parameters by FTIR and related analysis.