ISSN 0004-881X

Synthesis of Barium Cerate and Strontium Cerate Solid Electrolyte by A Reaction-Sintering Process

by Yi-Cheng Liou*, Song-Ling Yang

Department of Electronics Engineering, Kun-Shan University, Tainan Hsien 71003, Taiwan, R.O.C.

Abstract

Synthesis of BaCe_0.9Nd_0.1O_3-a and Sr_0.995Ce_0.95Y_0.05O_3-a ceramics by a reaction-sintering process was investigated in this study. Without any calcination involved, the mixture of raw materials was pressed and sintered directly. Monophasic BaCe_0.9Nd_0.1O_3-a ceramic was obtained at 1450 deg C/2 h sintering. A maximum value 5.82 g/cm³ (91.5% of the theoretical value) was found at 1500 deg C/2 h. Some weak reflections of SrCO₃ and CeO₂ were found in sintered Sr_0.995Ce_0.95Y_0.05O_3-a. Density of Sr_0.995Ce_0.95Y_0.05O_3-a ceramics reached a maximum value 5.69 g/cm³ (98.4% of the theoretical value) at 1350 deg C/2 h. The reaction-sintering process has proven a simple and effective method in preparing BaCe_0.9Nd_0.1O_3-a and Sr_0.995Ce_0.95Y_0.05O_3-a ceramics for solid electrolyte applications in solid oxide fuel cells.

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