PEROVSKITE TYPE MULTIPLE OXIDE, ITS PRODUCTION AND SOLID OXIDE ELECTROLYTE FUEL CELL USING THAT

摘要

PROBLEM TO BE SOLVED: To provide a perovskite multiple oxide which suppresses the solid phase reaction on the interface with a solid electrolyte, which shows improved heat resistance and durability while keeping the good catalytic activity, and which realizes power generation in a low temp. region, and to provide the producing method of the perovskite multiple oxide, and a solid oxide electrolyte fuel cell and its electrode by using the oxide above described. SOLUTION: In a perovskite multiple oxide expressed by the general formula of ABCO3 , two kinds of specified elements A', A'' are assigned in the A site, two kinds of specified elements B', B'' are assigned in the B site, and further, Mg which functions as a sintering assistant is assigned in the C site. Therefore, the perovskite multiple oxide of this invention is expressed by A'1-x A''x B'1-y B ''y CO3 . In the formula, A' is a lanthanoid element, A'' is a lonthanoid element except for A', B' is an aluminum group element, B'' is a platinum group element, and C is an alkaline earth element, and (x) and (y) satisfy 0