Zirconia-based composite oxide and method for manufacturing zirconia-based composite oxide
AssigneeDaiichi Kigenso Kagaku Kogyo Co., Ltd.
InventorsKazuya MATSUMOTO, Hiroshi KODAMA
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Abstract
The purpose of the present invention is to provide a zirconia-based composite oxide for making it possible to form a catalyst layer which, despite having a reduced thickness, has a sufficient quantity of catalyst to function in exhaust gas treatment on a wall of a honeycomb structure. The purpose of the present invention is also to provide a method for manufacturing said zirconia-based composite oxide. The present invention relates to a zirconia-based composite oxide characterized in that the tap bulk density thereof is 0.75 g/mL or greater, and the specific surface area thereof after heat treatment for three hours at 1000° C. is 45 m2/g or greater.
Claims15
A zirconia-based composite oxide having a tap bulk density of 0.75 g/ml or more and a specific surface area of 45 m2/g or more after heat treatment at 1000° C. for 3 hours.
Dependencies are inferred from the claim text.