Effect of pyrolysis temperature on the structure and conduction of polymer-derived SiC

Kewei Wang, Baisheng Ma, Xuqin Li, Yiguang Wang*, Linan An

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

37 引用 (Scopus)

摘要

We studied the electric conductivity and structure of polymer-derived carbon-rich amorphous SiC pyrolyzed at different temperatures. The conductivity of the material increased drastically with pyrolysis temperature followed an Arrhenius relationship with the activation energy of ~3.4 eV. Raman and X-ray photoelectron spectroscopy analysis revealed that the order of free carbon phase increased with pyrolysis temperature, accompanied by sp3→ sp2 transition. The activation energy for such a structure change was 3.1-3.8 eV, which is close to that for the conductivity change. We thus believe that the increase in the conductivity was mainly due to the increase in conductivity of the free carbon phase.

源语言英语
页(从-至)2135-2138
页数4
期刊Journal of the American Ceramic Society
97
7
DOI
出版状态已出版 - 7月 2014
已对外发布

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