Perovskite oxides were synthesized by using conventional solid-state reactions. The basic composition was Sr4In2Zr2O11, and the phase exhibited a cubic perovskite structure; which indicated that the O vacancies were disordered in this phase. The electrical conductivity of this material was estimated from alternating-current impedance measurements, in the absence of measurements of the ionic transference number. This revealed a conductivity of 0.02S/cm at 1273K. The conductivity was decreased upon substituting Ga3+ for In3+ and Y3+ for Zr4+.

Oxygen-Deficient Perovskite Compounds with Oxide Ion Conduction. Y.Arachi, T.Asai, O.Yamamoto, Y.Takeda, N.Imanishi: Solid State Ionics, 2000, 135[1-4], 757-60