无机材料学报

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一步法合成高纯度碳化硅粉体的研究

叶鑫南1, 赵中玲2, 兰琳1, 黄金秋1, 林昆仑1, 陈立富1   

  1. 1. 厦门大学特种先进材料实验室, 化学化工学院, 厦门 361005; 2. 黑龙江电力职工大学, 哈尔滨 150003
  • 收稿日期:2007-03-29 修回日期:2007-05-25 出版日期:2008-03-20 网络出版日期:2008-03-20

One-step Synthesis of High Purity Silicon Carbide Powder

YE Xin-Nan1, ZHAO Zhong-Ling2, LAN Lin1, HUANG Jin-Qiu1, LIN Kun-Lun1, CHEN Li-Fu1   

  1. 1. Advanced Materials Laboratory, Xiamen University, Xiamen 361005, China; 2. Heilongjiang Worker University of Electric Power, Harbin 100530, China
  • Received:2007-03-29 Revised:2007-05-25 Published:2008-03-20 Online:2008-03-20

摘要: 利用液态硅为原料, 以碳和二氧化硅粉末组成的混合物作为催化剂, 通过液态硅与一氧化碳之间的气-液相碳热反应, 一步合成了高纯度的碳化硅微细粉体, 制得的碳化硅粉体的平均颗粒尺寸为D50=0.41μm. 利用XRD、SEM、激光粒度分析和元素分析对粉体进行了表征, 并讨论了碳化硅粉体的形成机理.

关键词: 碳化硅粉体, 液态硅, 气相反应, 液相反应, 碳热还原

Abstract: Silicon carbide (SiC) powder was synthesized from liquid silicon in one step at the presence of a catalyst bar consisting of silica and carbon. The silicon carbide powders were formed by the carbothermal reaction between liquid silicon and gaseous CO, and the average particle size (D50) of the as-prepared silicon carbide powder was 0.41μm. The powder was characterized by XRD, SEM, particle size analysis and elemental analysis. The mechanism for the formation of the silicon carbide powder was discussed.

Key words: silicon carbide powder, liquid silicon, gas-phase reaction, liquid-phase reaction, carbothermal reduction

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