| 摘要 |
An air electrode body for a solid oxide fuel cell, which is composed of a perovskite-type structure having a chemical composition of (La1-xAx)1-yMnO3 wherein 0 < x </= .5, 0 < y </= 0.2, and A is at least one kind of metals selected from strontium, calcium, manganese, barium, yttrium, cerium and ytterbium. The air electrode body has a porosity of 15 to 40 % and an average pore diameter of 1-5 mu m. A process for producing the air electrode body, comprises the steps of: mixing lanthanum or a lanthanum compound, manganese or a manganese compound, a metal A or a compound of the metal A wherein A is at least one kind of metals selected from the group of strontium, calcium, manganese, barium, yttrium, cerium and ytterbium; calcining the resulting mixture at a temperature from 1,300 DEG C to 1600 DEG C to synthesize (La1-xAx)1-yMnO3; grinding the synthesized material to a powder having the average particle diameter of 3 to 15 mu m; adding at least an organic binder, water and 2 to 12 parts by weight of a pore-forming agent to 100 parts by weight of the resulting powder and kneading the resulting mixture; molding the kneaded material; and drying the molding and then firing the molding at a temperature not higher than the calcining temperature. A process for producing a solid oxide fuel with the above air electrode body is also disclosed. |
