The electrical conductivity properties of Fe-substituted SrSnO3 perovskite-type oxides as a function of temperature and O partial pressure were presented. SrSn1-xFexO3-δ (x = 0 to 1) was prepared by conventional solid state reaction in air by using SrCO3, SnO2 and FeC2O4▪2H2O. The total electrical conductivity increases with increasing Fe content. Compounds containing low Fe contents (x<0.5) were mixed oxide ion and electronic conductors in the O partial pressure range between 10-23 and 0.21atm with predominant n-type and p-type electronic conduction at low and high O partial pressure, respectively. SrSn1-xFexO3-δ with high Fe-content (x > 0.5) was found to be a predominant electronic conductor over the entire O partial pressure regime (10-23 to 0.21atm). The average oxide ion transference number was found to be in the range of 0.1 to 0.5 at 600 to 850C for x = 0.1 to 0.2.

Mixed Oxide Ion and Electronic Conductivity in Perovskite-Type SrSnO3 by Fe Substitution. V.Thangadurai, P.S.Beurmann, W.Weppner: Materials Science and Engineering B, 2003, 100[1], 18-22