Process for producing silicon carbide fibers

Details Process for producing silicon carbide fibers Process for producing silicon carbide fibers

1998-01-21

1999-07-13

Nguyen, Ngoc-Yen

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423345, 501 95, C01B 3136

Patent

active

059223006

ABSTRACT:
A process for producing silicon carbide fibers is provided, comprising the steps of mixing a silicon supply source powder including a mixture of silicon powder and silicon dioxide powder having a molar mixing ratio of 1:0.1 to 1:2 with activated carbon staple fibers having a length of 0.1 to 50 mm and a fiber thickness of 1 to 20 .mu.m and a specific surface area of 300 to 2000 m.sup.2 /g determined by the BET nitrogen absorption method; and heating the resultant mixture at a temperature of 1200 to 1500.degree. C. to directly convert the activated carbon staple fibers, in an atmosphere substantially free from substances reactive with carbon, silicon, silicon oxides and silicon carbide at the above mentioned temperature, to silicon carbide fibers.

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