The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2005
Filed:
Nov. 14, 2001
Miho Hatanaka, Aichi-gun, JP;
Akira Morikawa, Aichi-gun, JP;
Akihiko Suda, Aichi-gun, JP;
Hideo Sobukawa, Aichi-gun, JP;
Kiyoshi Yamazaki, Aichi-gun, JP;
Miho Hatanaka, Aichi-gun, JP;
Akira Morikawa, Aichi-gun, JP;
Akihiko Suda, Aichi-gun, JP;
Hideo Sobukawa, Aichi-gun, JP;
Kiyoshi Yamazaki, Aichi-gun, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Abstract
This composite oxide powder can secure a large pore volume even after calcination at high temperature and, when a catalyst is formed by loading a noble metal on this composite oxide powder, noble metal grain growth can be suppressed. The composite oxide powder comprises particles of an oxide of a metal Mand an oxide of a metal Mwhich does not dissolve in the oxide of the metal M, the oxide of the metal Mand the oxide of the metal Mbeing dispersed at the nanometer level. Since different oxides serve as a barrier to each other, sintering is suppressed. Therefore, in the case of composite oxide powder comprising Ce as a metal Mand Al as a metal M, grain growth is small even after exposed to high temperature and pores of 3.5-100 nm secure a volume of 0.07 cc/g or more after calcination at 600° C. for 5 hours and a volume of 0.04 cc/g or more after calcination at 800° C. for 5 hours.