Research on the preparation, electrical and mechanical properties of γ-LiAlO2 ceramics

A combustion synthesis technique, the glycine-urea-nitrate process is described and investigated in this paper. A combination of the aqueous solution of glycine-urea and metal nitrates was employed as a precursor for the process. Pure gamma-LiAlO2 powders with fine crystal structure and high reactivity could be obtained by the combustion technique. gamma-LiAlO2 ceramics with homogeneous microstructure, high lithium conductivity and bending strength was prepared from the powder. Lithium rich ceramics and lithium deficient phases demonstrated improved ionic conductivities, which can be attributed to different mechanisms. (C) 2004 Elsevier B.V. All rights reserved.