| abstract |
Silicon carbide fibers having a high tensile strength are produced by n (1) dissolving at least one of organosilicon high molecular weight compounds having a softening point of higher than 50° C, in which silicon and carbon are the main skeleton components, in a solvent for the organosilicon high molecular weight compounds or heating and melting said organosilicon high molecular weight compounds to prepare a spinning solution and spinning said spinning solution into filaments, n (2) preliminarily heating the spun filaments at a temperature of 350°-800° C under vacuum to volatilize low molecular weight compounds contained in the high molecular weight compounds, and n (3) baking the thus treated filaments at a temperature of 800°-2,000° C under vacuum or at least one non-oxidizing atmosphere selected from the group consisting of an inert gas, CO gas and hydrogen gas, to form silicon carbide fibers. |