Title:
複合酸化物粉末及びその製造方法
Document Type and Number:
Japanese Patent JP4032652
Kind Code:
B2
Abstract:
Composite oxide powder has a large specific surface area and a large pore volume even after a high-temperature durability test, without losing oxygen storage ability of a single metal oxide. In this composite oxide powder, a first metal oxide having oxygen storage ability is held as ultrafine particles in the form of islands by a second metal oxide which is different from the first metal oxide, pore volume is not less than 2 cc/g and the first metal oxide particles have a diameter of not more than 30 nm even after subjected to high temperature of 900° C. or more. Since the first metal oxide particles are held in the form of islands by the second metal oxide particles, separated from each other and suppressed from contacting each other, the first metal oxide particles hardly grow granularly.
Inventors:
Akira Morikawa
Takao Tani
Miho Hatanaka
Akihiko Suda
Takao Tani
Miho Hatanaka
Akihiko Suda
Application Number:
JP2001047934A
Publication Date:
January 16, 2008
Filing Date:
February 23, 2001
Export Citation:
Assignee:
Toyota Central R & D Labs.
International Classes:
B01D53/94; C01F17/00; B01J20/06; F01N3/10; B01J23/10; B01J23/63; B01J32/00; B01J35/02; B01J37/00; C01B13/02; C01B13/14; C01G23/047; F01N3/28
Domestic Patent References:
| JP5220394A | ||||
| JP8073221A | ||||
| JP2000203810A | ||||
| JP10182155A | ||||
| JP4292480A | ||||
| JP6279027A | ||||
| JP6246155A | ||||
| JP2001000862A | ||||
| JP61038627A |
Attorney, Agent or Firm:
Hiroshi Okawa