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. 03, 1978
Filed:
Apr. 08, 1977
Applicant:
Inventors:
Osami Kamigaito, Nagoya, JA;
Yoichi Oyama, Nagoya, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
106 734 ; 106 65 ; 106 735 ; 264 65 ;
Abstract
Ceramic products composed essentially of a novel silicon nitride solid solution, which have high heat resistance, high abrasion resistance and low thermal expansion are obtained by sintering mixed powders of silicon nitride, alumina and aluminum nitride. The sintering includes heating said mixed powders at a temperature between 1650.degree. C and 2000.degree. C under a high pressure or no pressure. During the heating most of the alumina and aluminum nitride are occluded in silicon nitride and said ceramics products composed of silicon nitride solid solution are formed.