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:
Dec. 01, 1992
Filed:
Aug. 29, 1991
Applicant:
Inventors:
Craig P Cameron, Ellicott City, MD (US);
Roy W Rice, Alexandria, VA (US);
Assignee:
W. R. Grace & Co. Conn., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 63 ; 264332 ; 264338 ; 501 98 ; 501127 ;
Abstract
A boron compound, capable of forming boron oxide on hot pressing in an oxygen-containing atmosphere, is used as a densification aid for hot pressing of alumina-containing ceramics in oxygen-containing atmospheres. The boron compound may be incorporated into the material to be hot pressed or may be applied to the surface of that material. Air may be used as the hot pressing atmosphere. The alumina-containing ceramic to be hot pressed may be formed by reaction processing techniques. Boron nitride is a preferred boron compound.