A new series of mixed conducting oxides, Sr10-n/2BinFe20O, where n was equal to 4, 6, 8 or 10, was synthesized by using a solid-state reaction method. They had high O permeability, and the permeation rate at 1150K was 0.41mlSTD/cm2min for n = 6, and 0.90mlSTD/cm2min for n = 10. This was twice as high as that for Sr0.5Bi0.5FeO3. In the case of Sr1-xBixFeO3, where x was equal to 0.1, 0.3, or 0.5, the O flux increased with increasing Bi content.

S.Li, Y.Cong, L.Fang, W.Yang, L.Lin, J.Meng, Y.Ren: Materials Research Bulletin, 1998, 33[2], 183-8