Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Characterization of SiC/C Nanocomposite Powders Synthesized by Arc-Discharge

  • Zhou, Lei (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Yu, Jie Yi (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Gao, Jian (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Wang, Dong Xing (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Gan, Xiao Rong (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Xue, Fang Hong (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Huang, Hao (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology) ;
  • Dong, Xing Long (Key Laboratory of Materials Modifi cation by Laser, Ion, and Electron Beams (Ministry of Education) and School of Materials Science and Engineering, Dalian University of Technology)
  • Received : 2015.12.08
  • Accepted : 2015.12.09
  • Published : 2015.12.30
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Abstract

In this paper, three carbon sources, i.e., solid graphite, gaseous CH4 and liquid ethanol, and one solid silicon source were employed to synthesize SiC/C nanocomposite powders by arc-discharge plasma. The processing conditions such as the component ratios of raw materials, atmospheric gases, etc. were adjusted for controllable synthesis of the nanopowders. It is indicated that both of solid graphite and silicon can be co-evaporated and reacted to form nanophases of cubic ${\beta}$-SiC with ~50 nm in mean size and a little free graphite; the carbon atoms decomposed from gaseous $CH_4$ favor to combine with the evaporated silicon atoms to form the dominant SiC nanophase; liquid carbon source of ethanol can also be used to harvest the main ${\beta}$-SiC and minor 6H-SiC phases in the assembly of nanoparticles. The as-prepared SiC/C nanocomposite powders were further purified by a heat-treatment in air and their photocatalytic performances were then greatly improved.

Keywords

References

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