No abstract

Abstract. The electrical conductivity of the SrTil.xFexO3-8, BaTil_xFexO3.8 and SrTil_xMnxO3_8 systems has been studied in a range of oxygen partial pressures between 10 -16 and 0.21 atm at 900 and 1000 ~ The materials exhibit predominantly ionic conductivity in a wide range of intermediate oxygen partial pressures. It has been found that in Fe doped strontium and barium titanates, the dependencies of the ionic conductivity on the acceptor concentration show a local maximum near x = 0.2. Taking into account that in the CaTil.xFexO3.ssystem (x = 0-0.5), the concentration dependence of the ionic conductivity also has a maximum near x = 0.2, it caq be concluded that this is a common phenomenon for Fe doped alkali earth titanates. An assumption has been made that a scheme of defect formation devised earlier for Fe doped calcium titanate is applicable for other alkali earth titanates.

No abstract

No abstract

No abstract