连续Si-Fe-C-O功能陶瓷纤维的制备及其表面分析

无机材料学报

连续Si-Fe-C-O功能陶瓷纤维的制备及其表面分析

陈志彦, 李效东, 王军

国防科技大学新型陶瓷纤维及其复合材料重点实验室, 长沙 410073

收稿日期:2005-01-25 修回日期:2005-04-28 出版日期:2006-01-20 网络出版日期:2006-01-20

Preparation and Surface Depth Analysis of Continuous Si-Fe-C-O Functional Ceramic Fibers

CHEN Zhi-Yan, LI Xiao-Dong, WANG Jun

Key Lab of new Ceramic Fibers and Composites, National University of Defense Technology, Changsha 410073, China

Received:2005-01-25 Revised:2005-04-28 Published:2006-01-20 Online:2006-01-20

摘要/Abstract

摘要： 采用聚二甲基硅烷(PDMS)?和二茂铁合成出聚铁碳硅烷(PFCS), 后者经熔融纺丝、预氧化、烧成, 可制得?电阻率低至10^-2Ω·cm、拉伸强度
2.0GPa、长度>500m的连续Si-Fe-C-O纤维. 探索了连续Si-Fe-C-O纤维的制备工艺. 研究了铁对纤维电?阻率和β-SiC结晶的影响: 铁含量的增
加有利于β-SiC晶粒的增长和电阻率的降低. XPS剖面分析表明: 陶瓷纤维的表面富含碳, 随着径向深度增大铁含量增加.

关键词: 连续Si-Fe-C-O?纤维, 合成, 电阻率, β-SiC, XPS剖面分析

Abstract: Polyferrocarbosilane(PFCS) was synthesized from polydimethylsilane and ferrocene. Low specific resistance Si-Fe-C-O fibers were prepared with the following process: The PFCS was
melt-spun, the resulted green fibers were cured by heating in air, and the cured fibers were sintered under an inert atmosphere.
The preparation techniques of continuous Si-Fe-C-O fibers were investigated. The results show that the specific resistance of the Si-Fe-C-O fibers is reduced to 10^-2Ω·tcm, when the amount of ferrocene in feed is 2%. The tensile strength of the
fibers is about 2.0GPa, and the length of the fibers is more than 500 meters. The element iron contained in the fiber accelerates the growth
of β-SiC crystalline grain. XPS depth analysis shows a carbon-enriched layer of about 120nm on the surface of fiber, the atomic
concentration of element Fe increasing a little from edge to inner.

Key words: continuous Si-Fe-C-O fibers, synthesis, specific resistance, β-SiC, XPS depth analysis

中图分类号:

TQ343

陈志彦,李效东,王军. 连续Si-Fe-C-O功能陶瓷纤维的制备及其表面分析[J]. 无机材料学报.

CHEN Zhi-Yan,LI Xiao-Dong,WANG Jun. Preparation and Surface Depth Analysis of Continuous Si-Fe-C-O Functional Ceramic Fibers[J]. Journal of Inorganic Materials.

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