Conductivity measurements of CaTi1-xFexO3, where x was equal to 0.1, 0.2 or 0.3, were performed on pressed and sintered polycrystalline tablets by using the Van der Pauw 4-point method in controlled atmospheres. The results were interpreted in terms of n-type, ionic and p-type conductivity at various O partial pressures. It was found that an increase in the Fe content increased the number of O vacancies and increased the ionic conductivity at high temperatures. It also increased the tendency to ordering; which suppressed the ionic conductivity at more moderate temperatures.

Ionic and Electronic Conductivity in Ca(Ti,Fe)O3. S.Marion, A.I.Becerro, T.Norby: Ionics, 1999, 5[5-6], 385-92