SPINNING SOLUTION FOR ELECTRICAL FORMING, METHOD FOR OBTAINING FIBRES BY ELECTRICAL FORMING, AND FIBRES OF SILICONE CARBIDE

摘要

FIELD: electricity. ^ SUBSTANCE: spinning solution for electrical formation of polymer precursor of fibres of siliconecarbide contains 50 - 70 % solution of polycarbosilane with average molecular weight of 800 - 1500 astronomical units of weight, cross-linking agent and photoinitiator at the following molar ration of components: polycarbosilane/cross-linking agent/photoinitiator = 1/(0.5-1.5)/(0.5-2). Method for obtaining silicone carbide fibres involves preparation of spinning solution, electrical forming of fibres of precursor of silicone carbide from spinning solution with simultaneous cross-link of precursor fibres by light irradiation in visible or UV radiation range and heat treatment of precursor fibres for their conversion to silicone carbide fibres. Silicone carbide fibres made in compliance with the above method have average diameter of 50 nm to 2 mcm and porosity of less than 10 m2/g. ^ EFFECT: invention provides high capacity and low cost of production of high-quality silicone carbide fibres characterised with high mechanical strength and low porosity. ^ 6 cl, 1 tbl