Enhancement of oxygen surface exchange kinetics of SrTiO3 by alkaline earth metal oxides

The oxygen incorporation reaction in undoped SrTiO3 was investigated by electrical measurements (pressure modulation technique) in the temperature range from 650-920 degrees C and by means of tracer exchange experiments in the temperature range from 458-600 degrees C. The surface of the undoped SrTiO3 single crystals was modified by alkaline earth metal compounds leading to a tremendous enhancement of the effective surface exchange rate for oxygen incorporation as compared to the uncoated surface.