Effect of pyrolysis temperature on the electric conductivity of polymer-derived silicoboron carbonitride

被引：62
|
作者：
Chen, Yaohan
Yang, Xueping
Cao, Yejie
An, Linan [1 ]
机构：
[1] Univ Cent Florida, Dept Mat Sci & Engn, Orlando, FL 32816 USA
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 10期
基金：
美国国家科学基金会;
关键词：
Precursors-organic; Electric conductivity; Activation energy; Carbon; SiBCN ceramics; CERAMICS; TRANSPORT; BEHAVIOR;
D O I：
10.1016/j.jeurceramsoc.2014.03.012
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The electric conductivity of polymer-derived SiBCNs pyrolyzed at different temperatures was studied. We showed that the boron impeded the graphitization of the free-carbon phase in the SiBCN, leading to a higher characteristic temperature and activation energy as compared to the SiCN. Such an impeding effect is due to the interaction between h-BN and graphite phase. We also provided a credible evidence to show that the increase in the electric conductivity of the SiBCN with pyrolysis temperature is likely due to the increase in the conductivity of the free-carbon phase. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2163 / 2167
页数：5
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