The electrical conductivity of donor-doped and undoped ceramics and of single crystals of Sr1-xLaxTiO3, where x ranged from 0 to 0.1, was investigated at temperatures ranging from 1000 to 1400C; under O partial pressures of 10-21 to 1bar. By incorporating published Hall-effect and thermopower data, a set of parameters for a defect-chemical model was determined. This model precisely described the point-defect concentrations and transport properties of these materials. It was shown that defects in the cation sub-lattice completely governed the electrical behavior of donor-doped and undoped material. In the latter case, frozen-in Sr vacancies acted as intrinsic acceptors.

R.Moos, K.H.Härdtl: Journal of the American Ceramic Society, 1997, 80[10], 2549-62