| 摘要 |
PROBLEM TO BE SOLVED: To obtain an electroconductive ceramic and fuel cell capable of preventing failure caused by phase transformation. SOLUTION: This electroconductive ceramic contains a perovskite type crystalline phase containing La, Cr and Mg as a main crystalline phase and has oxide phase containing La and when a compositional formula by atom ratio is represented as R( X+u) Mg(y+v) Crz Mp [R is Ra or at least one among La and rare earth elements other than La; M is Al or at least one kind of element among Al, Ni, Co and Mn; (x), (y), (z) and (p) are each atomic ratio of R, Mg, Cr and M in perovskite type crystals], (x), (y), (z), (u), (v) and (p) each satisfy the formulas 0.0001<=u/(x+y+z+P)<=0.20, 0.20<(y+v)/(x+y+z+p)<=0.60, (v)>0 and 0.01<=(p)/(x+y+z+p)<=0.15. |
