The conductivity of samples which were doped with 10%Sr on the A-sites and 10%Mg on the B-sites was measured at various temperatures and O partial pressures. Doped LaGaO3 was found to be an almost pure ionic conductor; with a conductivity of 0.095S/cm at 800C. The conductivity of doped LaGaO3 decreased with time, due to the precipitation of a secondary phase. The doped LaAlO3 and LaScO3 were mixed conductors, in an oxidizing atmosphere. Their ionic conductivities at 800C were equal to 0.0013 and 0.0005S/cm, respectively. The large differences in the conductivities of these materials was attributed partly to grain-boundary resistivity.

Conductivity of A- and B-Site Doped LaAlO3, LaGaO3, LaScO3 and LaInO3 Perovskites. D.Lybye, F.W.Poulsen, M.Mogensen: Solid State Ionics, 2000, 128[1-4], 91-103