Phase Relation Studies in the CeO2-Sm2O3 System at 1500 to 600 °C in Air

Introduction For many years, CeO2-based materials have been mainly used as catalysts and pigments in ceramics or glasses. Today ceria based materials are of great worldwide interest for many engineering applications such as catalysts, solid electrolytes, laser media, radio wave absorbers, components for electronics, and so on. Much attention is now focused on development of alternative power sources which are based on electrochemical devices, in particular on fuel cells. As solid electrolytes for fuel cells that operate at high temperatures (up to 1000 °С), materials on the basis of Y2O3 stabilized zirconia are used, whereas ceria based solid solutions are promising as electrolytes operating at moderate temperatures (tо 600 °С) [1-10].