| 摘要 |
The invention presents an ion conductor with high reliability, that is one of the following perovskite oxides: {circle around (1 perovskite oxide of the composition BaZr1-xCexO3-p (0<x<0.8); {circle around (2 perovskite oxide consisting essentially of Ba, Zr, Ce and O, and substantially conducting protons only; {circle around (3 perovskite oxide of the composition BaZr1-x-yCexMyO3-p (M, O<=x<1,0<y<1, x+y<1) that is a single-phase polycrystal of cubic, tetragonal or orthorhombic crystal structure whose unit cell edges a, b and c (with a>=b>=c) satisfy 0.8386 nm<a<0.8916 nm and b/a>=0.90; {circle around (4 perovskite oxide of the same composition as in {circle around (3 that is a single-phase sintered product with a density of at least 96% of the theoretical density; and {circle around (5 perovskite oxide of the same composition as in {circle around (3 that is a single-phase sintered product with 1 to 30 mum granular diameter.
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