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无机材料学报

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机械活化燃烧合成SiC粉体的研究

杨坤1,2, 杨筠1, 林志明1, 李江涛1
   

  1. 1. 中国科学院理化技术研究所, 北京 100080;
    2. 中国科学院研究生院, 北京, 100049
  • 收稿日期:2006-04-06 修回日期:2006-06-05 出版日期:2007-03-20 网络出版日期:2007-03-20

Mechanical-Activation-Assisted Combustion Synthesis of SiC

YANG Kun 1,2, YANG Yun1, LIN Zhi-Ming1, LI Jiang-Tao1   

  1. 1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

  • Received:2006-04-06 Revised:2006-06-05 Published:2007-03-20 Online:2007-03-20

PDF (PC)

1904

被引次数

13

摘要： 以硅粉和碳黑为初始原料, 通过机械活化和化学活化预处理, 实现了Si-C体系在较低温度下燃烧合成SiC. 采用XRD、SEM和EDS等手段, 分析了合成产物的相组成和微观结构特征. 结果表明: 机械活化预处理可使燃烧反应诱发温度降低至1050℃, 合成SiC粉体的比表面积为4.36 m2/g, 平均粒径<5μm.

关键词: 机械活化, 燃烧合成, 化学激励剂, SiC

Abstract: Mechanical-activation-assisted combustion synthesis of SiC was conducted with PVC and/or NH4Cl as promoters. The mechanical activation of the Si-C reactants through high-energy attrition milling results in substantial decrease of the ignition temperature and the incubation time for the Si-C combustion reaction. Ultra-fine β-SiC powders with equiaxed grains can be synthesized at the preheating temperature as low as 1050C. The specific surface area (SSA) of the combustion synthesized SiC powders is 4.36m2/g, and the average particle size is less than 5μm.

Key words: mechanical activation, combustion synthesis, promoter, SiC

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