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:
Mar. 12, 1991
Filed:
Dec. 12, 1988
Applicant:
Inventors:
Jean-Francois Baumard, Limoges, FR;
Bertrand Dubois, Orleans, FR;
Philippe Odier, Saint-Denis en Val, FR;
Assignee:
Rhone-Poulenc Chimie, Courbevoie, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ; C04B / ;
U.S. Cl.
CPC ...
423608 ; 423266 ; 501103 ; 501104 ;
Abstract
Sinterable, morphologically and chemically homogeneous stabilized zirconia fine powders, e.g., yttrium-stabilized zirconia powders, are prepared by heat treating aerosol droplets which comprise a mixed precursor solution of at least one inorganic zirconium salt and at least one inorganic salt of a zirconia-stabilizing element, said heat treating including (a) heating the aerosol droplets to a temperature of from 400.degree. to 500.degree. C. for a period of time of from 4 seconds to 2 hours, and thereafter (b) calcining such droplets at a temperature of from 650.degree. to 1,250.degree. C.