| 摘要 |
PROBLEM TO BE SOLVED: To provide a mixed ion conductor of an oxide having a particularly high proton conductivity for electrochemical device, such as a sensor and a fuel cell. SOLUTION: This proton conductive oxide having oxide ion conductivity has a unit lattice composition expressed by formula Sra Lb Cec Md O3-α (0<α<1.5), and Ca or Ba is used as a substituent element L, and a rare-earth group element is used as a substituent element M, and in the formula, (a), (b), (c), (d) are set such that 0.9<=a<=1.1, 0<=b<=0.1, 0.7<=c<=1.0, 0.16<=d<=0.40, to constilute the mixted ion conductor. |
