| 摘要 |
A material which conducts protons or oxide ions with high ionic conductivity and is excellent in moisture resistance and reduction resistance is provided. A perovskite oxide represented by the formula (1): BaZr a Ce b M 1 c L 1 d O 3-± ... (1) (wherein M 1 is at least one member selected from the group consisting of rare earth elements, In, Mn, Fe, Co, Ni, Al and Ga, L 1 is at least one member selected from the group consisting of P, B and N and a, b, c, d and ± satisfy 0 ‰ a < 1.2, 0 < b < 1.2, 0 < c < 1.2, 0.9 < a+b+c < 1.2, 0 < d < 0.1 and 0 < ± < 3) is used as an ionic conductor. |
