| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a silicon carbide powder composition from which silicon carbide sintered compact having a high density and such an electrical insulation property that the volume resistivity can be arbitrarily controlled in a range of 10<SP>6</SP>-10<SP>13</SP>Ω×cm can be inexpensively produced in an industrial scale by firing the composition under normal pressure without performing specific atmosphere control or using a firing apparatus under pressure such as a hot pressing device; a method for producing the silicon carbide sintered compact using the same; and the silicon carbide sintered compact. <P>SOLUTION: The silicon carbide powder composition contains, by weight, free carbon or a precursor capable of being carbonized when it is heated in an amount of 0.5-8 wt% expressed in terms of carbon, boron or a boron compound in an amount of 0.1-4 wt% expressed in terms of boron and a silicon nitride powder in an amount of 0.1-6 wt%, and the balance comprising a silicon carbide powder and inevitable impurities. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
