CERIUM AND ZIRCONIUM OXIDES, MIXED OXIDES AND SOLID SOLUTIONS HAVING IMPROVED THERMAL STABILITY FOR CATALYSIS OF EXHAUST GAS SYSTEMS AND METHODS OF PRODUCING

摘要

To produce a heat stability is improved cerium oxide and zirconium mixed oxides, solid solutions. The process is cerium and an oxide, mixed oxides and cerium and zirconium solid solution of zirconium balls - the step of forming the thermal hydrolysis and co-precipitation, washing or impregnating the mixture with an alkoxyl the acylated compound having two or more carbon atoms includes, and subjected to a firing step to form an oxide having a large surface area and high oxygen storage capacity after the washing or impregnating stage. By improving the thermal stability of the oxide it can be used as useful in a catalytic converter.