Preparation of continuous Si-Fe-C-O functional ceramic fibers

来源期刊:中国有色金属学报(英文版)2007年第5期

论文作者:陈志彦 李效东 王军 李文芳

文章页码:987 - 987

Key words:continuous Si-Fe-C-O fiber; SiC fiber; polyferrocarbosilane; ferrocene; electromagnetic properties

Abstract: A new polymer named polyferrocarbosilane(PFCS) was prepared from polydimethylsilane and ferrocene. The spinnability of this polymer can be tailored by controlling the content of ferrocene in the polymer. The prepared polymer was spun into a continuous polymer fiber that was subsequently cured in air and heat-treated finally in N2 up to 1 350 ℃ for conversion into Si-Fe-C-O fibers. The resulted Si-Fe-C-O fibers display low specific resistance and magnetic property due to the existence of Fe, which also reduces the specific resistance significantly to 10-2 Ω?cm at room temperature when the amount of ferrocene in feed is as low as 3.0% (mass fraction). The resulted Si-Fe-C-O fibers, with C/Si molar ratio of about 1.3 and the maximum Fe content of about 2.0% (mole fraction), are composed of β-SiC and small amount of Fe3Si-like crystalline and have an average tensile strength of about 2.0 GPa.

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