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:
Jan. 14, 1992
Filed:
Oct. 31, 1988
Applicant:
Inventor:
Sophia R Su, Weston, MA (US);
Assignee:
GTE Laboratories Incorporated, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 63 ; 501 97 ;
Abstract
A process for making a densified silicon nitride article utilizing polysilanes or polysilazanes as a binder is described. The process involves blending of a silicon nitride composition with a polysilane or a polysilazane to form a mixture. The mixture is molded into an article. The article is then pyrolyzed in a non-oxidizing atmosphere and at a temperature sufficient to form a pyrolyzed article comprising amorphous silicon nitride and silicon carbide. The article is then sintered at a temperature equal to or greater than 1400.degree. C. to form a densified silicon nitride article.