The perovskites, Sr0.5La0.05Li0.35ٱ0.1Ti0.5Ta0.5O3 and Sr0.35La0.15Li0.35ٱ0.5Ti0.5Ta0.5O3, were synthesized. Both compounds had cubic symmetry (Pm3m) and the A- and B-site ions were randomly distributed. The ionic conductivities of the bulk at 300K were equal to 6.8 x 10-4S/cm for Sr0.35La0.15Li0.35ٱ0.5Ti0.5Ta0.5O3 and to 7.2 x 10-4S/cm for Sr0.35La0.15Li0.35ٱ0.5Ti0.5Ta0.5O3. These values were higher than that (5.5 x 10-4S/cm) for Sr0.5Li0.5Ti0.5Ta0.5O3. The ionic conduction was found to be based upon vacancy processes; as observed in other perovskite-type Li-ion conductors.

Lithium Ion Conductivity in A-Site Deficient Perovskites. Y.Inaguma, T.Katsumata, M.Itoh: Electrochemistry, 2000, 68[6], 53-6