摘要 |
A mixed ionic conductor with an ion conductive oxide has a perovskite structure of the formula Ba a(Ce1-b M1b)L c O3-.alpha. , wherein M1 is at least one trivalent rare earth element other than Ce; L is at least one element selected from the group consisting of Zr, Ti, V, Nb, Cr, Mo, W, Fe, Co, Ni, Cu, Ag, Au, Pd, Pt, Bi, Sb, Sn, Pb and Ga; with 0.9 ~ a ~ 1; 0.16 ~ b ~ 0.26; 0.01 ~ c ~ 0.1; and (2 + b - 2a)/2~ .alpha. < 1.5. Such a mixed ionic conductor has not only the necessary conductivity for electrochemical devices such as fuel cells, but also superior moisture resistance. |