Title:
酸素吸収放出能を有する複合酸化物の製造法
Document Type and Number:
Japanese Patent JP4094689
Kind Code:
B2
Abstract:
A composite oxide having oxygen absorbing and desorbing capability containing 90 to 100 weight % total of cerium, zirconium, and hafnium based on a total amount of metals contained in the composite oxide, the total amount of cerium, zirconium, and hafnium consisting of 14.0 to 70.5 at% cerium, 29.49 to 72.5 at% zirconium, and 0.01 to 13.5 at% hafnium, wherein degree of solid solution of the composite oxide is not lower than 70 %, and wherein the composite oxide has reducing property that not less than 90 % of tetravalent cerium contained in the composite oxide is reduced into trivalent cerium when the composite oxide is held at 600 DEG C under a reducing atmosphere; and a method for preparing the composite oxide including the steps of preparing a composite salt from a starting material solution wherein 85 weight % or more of the cerium ions are Ce4+ by coprecipitation, and subjecting the resulting precipitate to a particular calcining steps including reducing calcination.
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Inventors:
Yokoi Hideo
Muroto Tadatoshi
Kazuhito Fujiwara
Hirofumi Takemori
Muroto Tadatoshi
Kazuhito Fujiwara
Hirofumi Takemori
Application Number:
JP8375396A
Publication Date:
June 04, 2008
Filing Date:
April 05, 1996
Export Citation:
Assignee:
Anan Kasei Co., Ltd.
International Classes:
B01D53/86; C01G27/00; B01J20/06; B01J23/10; C01B13/02; C01G25/00
Domestic Patent References:
| JP6226094A | ||||
| JP7016452A | ||||
| JP10512191A | ||||
| JP4055315A |
Attorney, Agent or Firm:
Hajime Sakai
Masahiro Kurai
Masahiro Kurai