| 摘要 |
PROBLEM TO BE SOLVED: To provide a silicon carbide sintered compact having a high density, excellent various properties of the silicon carbide sintered compact of its own, a low electric resistivity and higher versatile applicability and the producing method. SOLUTION: The silicon carbide sintered compact is a sintered compact composed of an α-silicon carbide containing 0.07-0.15 wt.% boron, 1.0-4.0 wt.% free carbon and 0.1-1.2 wt.% aluminum and has >=3.1 g/cm<3> bulk density and <=1×10<2> Ω.cm electric resistivity. And the producing method has a process for forming a composition prepared by adding and blending at least an organic compound capable of carbiding with boron carbide in a heat treating process as a sintering assistant and 0.1-1.2 wt.% high purity alumina having >=80 m<2> /g specific surface area as aluminum to α-silicon carbide powder and a sintering process for sintering the formed body at a temp. of 2000-2,200 deg.C under the atmospheric pressure. |
