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Effect of lattice structure of silicon carbide on crystal formation of carbide-derived carbon

Authors
Jeong, Min GunYoon, Seo HyunChun, Yoon SooLee, Eung SeokLim, Dae-Soon
Issue Date
11월-2014
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v.79, pp.19 - 27
Indexed
SCIE
SCOPUS
Journal Title
CARBON
Volume
79
Start Page
19
End Page
27
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/96940
DOI
10.1016/j.carbon.2014.07.016
ISSN
0008-6223
Abstract
Nanostructured carbide-derived carbons (CDCs) were synthesized from hexagonal SiC (alpha-SiC) and cubic SiC (beta-SiC) powders via chlorination at temperatures between 900 and 1200 degrees C. The content of the sp(2)- and sp(3)-bonded carbon phases and their crystallinity were analyzed by Raman spectroscopy. The nanocrystalline phases of the synthesized CDCs were observed and characterized by transmission electron microscopy and electron energy-loss spectroscopy. The morphology of CDCs showed interesting features that varied with the starting SiC powder. Diamond nanocrystals were more frequently observed in alpha-SiC-derived carbons than in beta-SiC-derived carbons, and the rate of graphitization was affected by the SiC polytype, synthesis temperature and hydrogen content. A possible mechanism responsible for the observed results was also investigated. (C) 2014 Elsevier Ltd. All rights reserved.
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