高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

SiC纤维的化学气相生长与表征

谢征芳1, 陶德良2, 王军1, 肖加余1   

  1. 1. 国防科技大学新型陶瓷纤维及其复合材料国防科技重点实验室, 长沙 410073
    2. 湖南工业大学绿色包装与生物纳米技术应用湖南省重点实验室, 株洲 412008

  • 收稿日期:2005-11-28 修回日期:1900-01-01 出版日期:2006-09-10 发布日期:2006-09-10
  • 通讯作者: 谢征芳

Synthesis and Characterization of Silicon Carbide Fibers by Chemical Vapor Growth

XIE Zheng-Fang1, TAO De-Liang2, WANG Jun1, XIAO Jia-Yu1   

    1. State Key Lab of Advanced Ceramic Fibers & Composites, National University of Defense Technology, Changsha 410073, China
    2. Key Laboratory of Green Packaging and Nanotechnology of Hunan Province, Hunan Polytechnic University, Zhuzhou 412008, China
  • Received:2005-11-28 Revised:1900-01-01 Online:2006-09-10 Published:2006-09-10
  • Contact: XIE Zheng-Fang

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被引次数

11

摘要： 以一甲基三氯硅烷为气源化合物, 二茂铁为催化剂, 噻吩为催化助剂, 用化学气相生长法直接制备SiC纤维. 研究了裂解温度、催化剂及助剂浓度及H2与MTS的配比等因素对裂解产物形态的影响. 分别采用SEM, EDX和XRD对产物的组成和形貌进行了表征. 结果表明, 产物由单一的β-SiC组成. 通过改变反应条件, 无需高、低压气氛及激光辅助, 即可以获得直径为20 nm~1.5 μm、长度从10 μm至数毫米的高长径比SiC纤维.

关键词: SiC纤维, 化学气相生长

Abstract:

Silicon carbide(SiC) fibers were directly synthesized by chemical vapor growth(CVG). Methyltrichlorosilane(MTS) was selected as the SiC gaseous source and, ferrocence and thiophene as the catalyst and the cocatalyst, respectively. The influences of pyrolysis temperature, the contents of catalyst and the cocatalyst, and the molar ratio of H2 to MTS on the morphologies of the pyrolysis products were investigated, respectively. The products were identified by X-ray diffraction(XRD), scanning electron microscopy(SEM) coupled with energydispersive X-ray(EDX), respectively. The results show that, the products are composed of β-SiC. The growing of SiC fibers suggests a conditions-dependent process. SiC fibers with different diameters(20 nm--1.5 μm) and length(10 μm to several micrometers), therefore, can be synthesized directly by CVG under various conditions without the help of laser, high or reduced pressure.

Key words: Silicon carbide(SiC) fiber, Chemical vapor growth(CVG), Characterization

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