Author(s)

Yan Li¹, Yuxi Yu^1*, Haisheng San¹, Qingkai Han², Linan An³

¹Fujian Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, China.
²School of Mechanical Engineering, Dalian University of Technology, Dalian, China.
³Department of Materials Science and Engineering, Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, USA.

The conductivity of polymer-derived SiOCN ceramics exhibited an Arrhenius dependence on pyrolysis temperature, with the activation energy of ~3.95 eV. The formation and structure change of the free carbon phase were detected by means of electron spin resonance spectroscopy and X-ray photoelectron spectroscopy. It reveals that the number of dangling bonds on the free carbon is increased as pyrolysis temperature increases, with the activation energy of ~3.87 eV. So it is demonstrated that the pyrolysis-temperature induced increase in the conductivity is mainly attributed to the increase of dangling on the graphite-like carbon.

Polymer Derived SiOCN Ceremic, Free Carbon, Activation Energy

Li, Y. , Yu, Y. , San, H. , Han, Q. and An, L. (2015) Effect of Pyrolysis Temperature on the Electrical Behavior of Polymer-Derived SiOCN Ceramic. Journal of Materials Science and Chemical Engineering, 3, 9-16. doi: 10.4236/msce.2015.310002.