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:
May. 06, 2008
Filed:
Nov. 15, 2002
Fumio Munakata, Tokyo, JP;
Kenji Furuya, Kanagawa, JP;
Masaharu Hatano, Kanagawa, JP;
Yoshinori Fujie, Kanagawa, JP;
Manabu Suhara, Kanagawa, JP;
Fumio Munakata, Tokyo, JP;
Kenji Furuya, Kanagawa, JP;
Masaharu Hatano, Kanagawa, JP;
Yoshinori Fujie, Kanagawa, JP;
Manabu Suhara, Kanagawa, JP;
Seimi Chemical Co., Ltd., Chigasaki, unknown;
Abstract
The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type crystal structure containing rare earth elements, and having constituent elements homogeneously dispersed therein. A homogeneous composite oxide having an abundance ratio of heterogeneous phases of at most 0.3% by average area ratio, and a melting point of at least 1470° C., is obtained by using metal carbonates, oxides or hydroxides, and reacting them with citric acid in an aqueous system.