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微波加热合成SiC纳米线的研究

卢 斌, 刘吉轩, 朱华伟, 焦羡贺
  

  1. (中南大学材料科学与工程学院, 长沙 410083)
  • 收稿日期:2006-11-21 修回日期:2006-12-26 出版日期:2007-11-20 网络出版日期:2007-11-20

SiC Nanowires Synthesized by Microwave Heating

LU Bin, LIU Ji-Xuan, ZHU Hua-Wei, JIAO Xian-He   

  1. (School of Materials Science and Engineering, Central South University, Changsha 410083, China)

  • Received:2006-11-21 Revised:2006-12-26 Published:2007-11-20 Online:2007-11-20

摘要:

采用单质Si粉和酚醛树脂为原料、均混、成型、碳化, 并以10℃/min的升温速率在1300~1400℃/0.5~2h的微波加热条件下制备了SiC纳米线. 用SEM和TEM观察所得SiC纳米线形貌, EDX检测样品成分. 结果发现: 所制备的SiC纳米线具有典型的SiC/SiO2芯-壳式缆状结构特征, 直径约为20~100nm. 分析认为, 在微波加热条件下, 液态Si在SiC纳米线生长过程中起着至关重要的作用, 既具有催化作用, 同时又是制备SiC纳米线的关键原料.



关键词: SiC, 纳米线, 酚醛树脂, 微波加热

Abstract: Large-scale silicon carbide nanowires were prepared by using pure silicon powder and phenolic resin, which were mixed, molded, carbonizated, and then subjected to the microwave heating with a rate of 10℃/min between 1300℃ and 1400℃ in the static argon atmosphere for 0.5--2h. The SiC nanowires were characterized by means of SEM and TEM, the composition of samples were determined through EDX. The prepared nanowires show a core-shell structure with diameters ranging from 20nm to 100 nm. The results show that liquid silicon acts as catalyst and key raw material for preparing SiC nanowires.

Key words: silicon carbide, nanowire, phenol formaldehyde resin, microwave heating

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