低比电阻Si-Ti-C-O纤维先驱体的合成

SYNTHESES OF PRECURSORS OF Si- Ti- C-O FIBERS WITH LOW SPECIFIC RESISTANCE

通过液体聚硅烷（ Ｌ Ｐ Ｓ） 与钛酸四丁酯 Ｔｉ （ Ｏ Ｂｕ）４ 反应合成了不同钛含量的聚钛碳硅烷先驱体，经熔融纺丝、不熔化处理及高温烧结等工艺制备出比电阻为１０６ ～１０３ Ω·ｃｍ 的 Ｓｉ Ｔｉ Ｃ Ｏ 纤维． 用 Ｉ Ｒ、 Ｇ Ｐ Ｃ、 Ｖ Ｐ Ｏ、 Ｔ Ｇ、 Ｄ Ｔ Ａ 等方法分析研究了聚钛碳硅烷的组成。

Polytitanocarbosilanes ( P T C) with different Ti content were synthesized by liquid polysilane( L P S) and Ti ( O Bu)4 . By using I R, G P C, V P O, T G, D T A,the co mposition , structure and properties of Polytitanocarbosilanes and theie relation with Ti content were studied . From these precursors , Si Ti C Ofibers with 106 ～10 3Ω·cm specific resistance were preduced after m elt spinning ,curing in airand sintering inhigh te mperature .