PROCESS FOR PRODUCING INORGANIC FIBER

摘要

A new process for producing an inorganic fiber of superior tensile strength and modulus of elasticity, which comprises spinning a spinning solution in organic solvent of polymetaloxane or polysiloxane of good spinnability to form a precursor fiber, and calcining said precursor fiber, wherein said solution containing polymetaloxane or polysiloxane comprising 0.1-95 mole % of a structural unit represented by the following general formula ¢A! and 99.9-5 mole % of the following formula ¢B!: ¢A! and/or ¢B! and/or wherein M represents a trivalent or tetravalent metal atom or a silicon atom, X1 represents a group of the formula where Y and m are as hereafter or an alkyl group, alkoxy group, acyl group, hydrogen, nitro or halogen, X2 and X3 represent an alkyl group, alkoxy group or acyl group, Y represents an alkoxy group; acyl group; alkoxy carbonyl group; cyano group; alkenyl group; phenyl group; phenoxy group, nitro group or halogen atom and m represents an integer from 1 to 3.