Method for the preparation of a sintered body of silicon carbide

Details Method for the preparation of a sintered body of silicon carbide Method for the preparation of a sintered body of silicon carbide

1989-12-12

1991-04-30

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

501 88, 501 92, C04B 3556

Patent

active

050116398

ABSTRACT:
A powdery mixture of a fine silicon carbide powder admixed with boron or a boron compound, e.g. boron carbide, titanium boride and boron oxide, as a sintering aid is compression-molded into a green body which is subjected to a sintering treatment into a sintered body. Different from conventional methods in which the sintering treatment is performed always in an atmosphere of an inert gas, e.g. argon, the sintering treatment in the inventive method is performed in an atmosphere of a rare gas containing 0.005-5% by volume of nitrogen. The sintered body of silicon carbide obtained by this method has an outstandingly high electric volume resistivity of 10.sup.10 to 10.sup.13 ohm.cm and a coefficient of thermal conductivity of 100-220 W/m.K.

REFERENCES:
patent: 4209474 (1980-06-01), Prochazka
patent: 4237085 (1980-12-01), Smoak
patent: 4346049 (1982-08-01), Coppola et al.
patent: 4541975 (1985-09-01), Honma et al.
patent: 4564490 (1986-01-01), Omori et al.
patent: 4668452 (1987-05-01), Watanabe

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