The investigation of changes in properties of composite material containing alumina and stabilized ceria-zirconia solid solution (ACZ) during aging

摘要

The study focuses on the development of composite material containing 50 wt. % alumina (Al_2O_3) and 50% mass Ce_(0.4)Zr_(0.5)Y_(0.05)La_(0.05)Ox solid solution by the method of co-precipitation. Also, samples of pure alumina (Al_2O_3) and pure solid solution Ce_(0.4)Zr_(0.5)Y_(0.05)La_(0.05)O_2 were prepared for comparison. Specific surface areas and the pore size distributions were determined by low-temperature adsorption/desorption of nitrogen. Oxide structures were determined by X-ray diffraction. Dynamic of changes in surface areas and crystalline size was investigated. It was shown that the composite has a surface and structure being more thermally stable than the pure composite chemical compound or their mechanical mixture.