Cerium-zirconium mixed oxide and method for manufacturing the same

摘要

A cerium-zirconium mixed oxide with improved heat resistance of the specific surface area at a high temperature (1000° C.) is provided along with a manufacturing method therefor. This cerium-zirconium mixed oxide comprises of spherical particles 5 to 20 nm in size and rodlike particles 5 to 20 nm in diameter and 30 to 150 nm in length, and preferably has a pore volume of 0.3 cm³/g or more and a specific surface area of 35 m²/g or more after 5 hours of heat treatment at 1000° C.