ISSN 0004-881X

Preparation of Zinc- Doped Lanthanum Strontium Gallate Solid Electrolyte Using a Reaction-Sintering Process

by Y. C. Liou, C. C. Lan, S. L. Yang
Department of Electronic Engineering, Kun Shan University, Tainan 71003, Taiwan, R.O.C

Abstract

La_0.8Sr_0.2Ga_0.8Zn_0.2O_2.8 ceramics prepared using a reaction-sintering process was investigated in this study. Without any calcination involved, the mixture of raw materials was pressed and sintered directly. SrLaGa₃O₇ is the major phase in 1150°C sintered pellets and decreased at higher sintering temperature 1250°C. La_0.8Sr_0.2Ga_0.8Zn_0.2O_2.8became the major phase in pellets sintered at 1250°C/2 h. Density of La_0.8Sr_0.2Ga_0.8Zn_0.2O_2.8 ceramics increases with sintering temperature and reaches a maximum 6.71 g/cm³ at 1230°C for 6 h. The reaction-sintering process has proven a simple and effective method in preparing La_0.8Sr_0.2Ga_0.8Zn_0.2O_2.8 ceramics for solid electrolyte applications in solid oxide fuel cells.

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