Patent ID: 7442661

Claim:
A process for producing a boron carbide-titanium diboride sintered body comprising mixing a titanium dioxide powder having an average particle diameter of less than 1 μm and a carbon powder having an average particle diameter of less than 1 μm to a boron carbide powder having a maximum particle diameter of at most 5 μm, an average particle diameter of at most 1 μm and a specific surface area of at least 10 m 2 /g, heating the mixture to a temperature of 1000° C. under a pressure of from 2.0×10 −1 to 2.0 10 −1 to 2.0 10 −2 Pa and sintering the mixture within a temperature range of from 1900 to 2100° C. while reacting them under a pressurized condition of at least 20 MPa.