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:
Aug. 09, 1994
Filed:
Nov. 03, 1992
Applicant:
Inventors:
Graham P Dransfield, Stockton on Tees, GB;
Denis J King, Middlesbrough, GB;
Assignee:
Tioxide Group Services Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427220 ; 501103 ;
Abstract
A process for coating particulate zirconia for use in ceramics is claimed. The particulate zirconia is coated with a hydrous oxide of a stabilizing metal such as yttrium, an alkaline earth metal or a rare earth metal by hydrolysis of a salt of the metal. An initial dispersion of the zirconia is prepared at a pH above 7.5 and, preferably, in the presence of an organic dispersing agent. The coated zirconia produced according to the process has been shown to form ceramic bodies with a higher strength than those prepared from particulate zirconia coated by prior known processes.