CERIA-ZIRCONIA SOLID-SOLUTION PARTICULATE AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a technique capable of directly synthesizing highly dispersible ceria-zirconia solid-solution particulates having excellent uniform mixability with a ternary catalyst and a function as a promoter in a step in which the particles are not subjected to heat treatment in the atmospheric air by a simple process. SOLUTION: A cerium (IV) salt and a zirconium salt are used and these salts are hydrolyzed simultaneously in parallel in the form that the salts are dissolved in an aqueous medium and is prepared as an aqueous mixed salt solution, by which the solid-solution particulates of ceria and zirconia are directly synthesized and are formed in the aqueous mixed salt solution.