Patent ID: 7414002
Filing Date: 2008-08-19
Classification: C04B,G11B,Y10T

Abstract:
1. An aluminum oxide-titanium nitride sintered body comprising 99% or greater main components by weight, the main components comprising of 65 to 85% by weight of aluminum oxide and titanium nitride constituting the rest, wherein a mean crystal grain size obtained by averaging the sum of the crystal grain sizes of the aluminum oxide and the titanium nitride is 0.4 to 2.0 μm; the aluminum oxide has a mean crystal grain size of 0.5 to 2.2 μm; and the titanium nitride has a mean crystal grain size of 0.2 to 1.6 μm; and wherein other component other than said main component consists essentially of 0.005 to 1 parts by weight of at least one selected from ytterbium oxide and yttrium oxide to 100 parts by weight of the main component.