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:
Sep. 21, 1993
Filed:
Aug. 15, 1991
Nobuoki Takagi, Sendai, JP;
Hiroki Tokunaga, Sendai, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
1. Disclosed is a ceramic sintered body comprising, as main components, (a) 60 to 80% by weight of alumina and (b) 20 to 40% by weight of titanium carbide or a combination of titanium carbide and titanium oxide, wherein said ceramic sintered body further comprises (c) 1 to 10 parts by weight, per 100 parts by weight of the sum of the components (a) and (b), of zirconium oxide, at least a part of which is composed of a tetragonal crystal, and (d) 0.4 to 11% by weight, based on the total ceramic sintered body, of a crystal phase of a composite oxide consisting of magnesium oxide and aluminum. This ceramic sintered body is excellent in the chipping resistance, machinability and surface smoothness, and the ceramic sintered body is suitable as a material of a substrate for a thin film head.