摘要 |
This invention provides a nickel oxide powder material, a production process thereof with high efficiency, a raw material composition for use in the same, and a fuel electrode material using the nickel oxide powder material. The nickel oxide powder material, when used as a fuel electrode material for a solid electrolyte fuel battery, can reduce heat shrinkage in firing to reduce a shrinkage difference from other constituent members, and can suppress the occurrence of cracking, separation, warpage and the like during firing. Also in power generation after re-reduction after exposure of the fuel electrode once to an oxidizing atmosphere, for example, due to abnormal fuel gas supply, a deterioration in structure of the fuel electrode can be suppressed, and the percentage voltage drop of the cell can be reduced. The nickel oxide powder material is used in a fuel electrode material constituting a solid electrolyte fuel battery and is characterized in that spinel represented by compositional formula: NiM2O4 wherein M represents a metal element is formed within or on the surface of the nickel oxide powder or at the interface between the powder particles. |