Patent ID: 7625836
Filing Date: 2009-12-01
Classification: B01J,C01G,C01P,C04B,F01N

Abstract:
1. A heat-resistant oxide, which is obtained by mixing a noble metal material containing at least one noble metal selected from the group consisting of platinum, rhodium and palladium with a zirconia material containing zirconia and a coordinative element material containing at least one coordinative element selected from the group consisting of rare earth elements, alkaline earth elements, aluminum and silicon to prepare a precursor composition containing the zirconia, the coordinative element and the noble metal and heat-treating the precursor composition at 650° C. or higher, wherein a rate of a solid solution of the noble metal in a fluorite-type oxide crystal structure comprising the zirconia, the coordinative element and the noble metal is 50% or more.