TITLE:
Effect of Pyrolysis Temperature on the Electrical Behavior of Polymer-Derived SiOCN Ceramic
AUTHORS:
Yan Li, Yuxi Yu, Haisheng San, Qingkai Han, Linan An
KEYWORDS:
Polymer Derived SiOCN Ceremic, Free Carbon, Activation Energy
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.10,
October
29,
2015
ABSTRACT: 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.