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:
Oct. 15, 2002
Filed:
Jan. 28, 1999
Pierre Macaudiere, Asnieres-sur-Seine, FR;
Thierry Seguelong, Puteaux, FR;
Rhodia Chimie, Courbevoie Cedex, FR;
Abstract
The present invention relates to a compound of the LaMO3 type, M being aluminum, gallium or indium, in the form of a powder or in sintered form, its process of preparation and its use as an oxygen conductor. The compound in powder form is capable of achieving, by pressureless sintering, a density of at least 93% of the theoretical density and of giving a sintered compound substantially free of any electrically active secondary phase of the grain boundaries. The compound in powder form is obtained by the reaction of the salts of lanthanum and of the element M with a base, and then the separation and calcining of the precipitate obtained. It may also be obtained by mixing, in a liquid medium, salts of lanthanum, and of the element M and, optionally, of a base, and then spray-drying and calcining the precipitate obtained. The sintered compound may be used in any application requiring an oxygen-conducting material in oxide form, such as solid-oxide fuel cells.