Patent ID: 7632769

Claim:
A zirconia porous body having (1) peaks at pore diameters of 8 to 20 nm and 30 to 100 nm in a pore distribution based on the BJH method, (2) a total pore volume of 0.4 cc/g or more, and (3) a specific surface area of at least 30 m 2 /g after 3 hours of baking at 1,000° C., the porous body being substantially composed of zirconium oxide, or a solid solution or mixed oxide comprising zirconium oxide and third component, the amount of the third component being 1 to 49% by weight of the porous body, the third component being at least one of the rare earth elements, transitional metal elements, Ca, Mg, Al, Si and Zn.