| abstract |
PROBLEM TO BE SOLVED: To provide a composite oxide powder for an air electrode material capable of suppressing a decrease in conductivity while maintaining a high open porosity of the air electrode. A composite oxide powder having a perovskite structure used as an air electrode material of a solid oxide fuel cell, having a volume average particle diameter of 2.0 μm or less and a crystallite size of 400 Å or less. Is characterized by. Here, it is preferable that the composition formula of the composite oxide powder is represented by the general formula (1). ABO 3 ...(1) (In the formula, one or more elements selected from A:La, Sr, and Ca, and one or more elements selected from B:Mn, Co, Fe, and Ni.) [Selection diagram] Figure 1 |