Interactions between components of SrTi sub(0.98)Nb sub(0.02)O sub(3-)[delta]YSZ and SrTi sub(0.98)Nb sub(0.02)O sub(3-)[delta]CeO sub(2) composites

Composites consisting of SrTiO sub(3)-based perovskite and either yttria-stabilized zirconia or ceria were investigated. The mechanical compatibility and possible inter-diffusion between phases were characterized by scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. A gradual disappearance of Ce-containing phases with an increase in the temperature of reduction in hydrogen was noticed. Moreover, a diffusion of Sr, Ti, and Ce was observed between the composites and the yttria-stabilized zirconia electrolyte support in the conditions of high temperature (1300-1400 degree C) reduction in H sub(2).