东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (2): 225-228.DOI: -

• 论著 • 上一篇    下一篇

溶胶-凝胶工艺对SiC粉体形貌的影响

裘荣鹏;才庆魁;张宁;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;沈阳大学机械工程学院 辽宁沈阳110004;辽宁沈阳110004;沈阳大学机械工程学院;辽宁沈阳110044;辽宁沈阳110044
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-02-15 发布日期:2013-06-22
  • 通讯作者: Qiu, R.-P.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50372041)

Effect of sol-gel process on morphology of powdered silicon carbide

Qiu, Rong-Peng (1); Cai, Qing-Kui (1); Zhang, Ning (2)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) School of Mechanic Engineering, Shenyang University, Shenyang 110044, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-02-15 Published:2013-06-22
  • Contact: Qiu, R.-P.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

1011

摘要： 以正硅酸乙酯(TEOS)和活性炭为原料,采用溶胶-凝胶法制备SiC前驱体,经1 400~1 600℃高温碳热还原反应合成了纯度较高的-βSiC粉体,这种粉体是由颗粒和晶须组成的混合物.通过前驱体的热重(TG)-差热(DSC)曲线分析了前驱体的热分解过程,通过X射线衍射(XRD)曲线分析了不同合成温度下的产物组织结构,并研究了无水乙醇(EtOH)与正硅酸乙酯的体积比和氨水浓度对产物形貌的影响,初步探讨了SiC颗粒和晶须的形成机理.

关键词: 溶胶-凝胶法, SiC粉体, 碳热还原反应, SiC颗粒, SiC晶须

Abstract: Silicon carbide precursor was prepared by sol-gel method using tetracthyl orthosilicate (TEOS) and active carbon as raw materials. Then, the powdered silicon carbide was synthesized by carbonthermal reduction reaction at 1400-1600°C. Such a powdered silicon carbide is a mixture of particles and whiskers. The pyrolysis process of silicon carbide precursor was analyzed by thermogravimetric (TG) and differential scanning calorimetry (DSC), and the composition and structure of powdered silicon carbide synthesized at different temperatures was analyzed by X-ray diffraction. The effects of the volume ratio of ethanol (EtOH) to TEOS and ammonia concentration on the morphology of products were investigated with the formation mechanism of silicon carbide whiskers and particles discussed preliminarily.

中图分类号: