Ceramic sintered body and process for preparation thereof

Details Ceramic sintered body and process for preparation thereof Ceramic sintered body and process for preparation thereof

1991-08-15

1993-09-21

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

C04B 3556

Patent

active

052468933

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.

REFERENCES:
patent: 4356272 (1982-10-01), Kanemitsu et al.
patent: 4582812 (1986-04-01), Furukawa et al.
patent: 4598052 (1986-07-01), Wada et al.

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