Dielectric property and interfacial polarization of polymer-derived amorphous silicon carbonitride

The dielectric behavior of polymer-derived amorphous silicon carbonitride was investigated. The material exhibited an interfacial polarization. Although such a polarization exhibited a sharp decrease in the dielectric constant with frequency, the loss peak from this mechanism was not clearly observe...

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Bibliographic Details
Published in:Ceramics international 2017-10, Vol.43 (15), p.12209-12212
Main Authors: Ma, Baisheng, Wang, Yiguang, Chen, Yigao, Gao, Yan
Format: Article
Language:English
Subjects:
Dielectric relaxation
Impedance spectroscopy
Silicon carbonitride
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Summary:The dielectric behavior of polymer-derived amorphous silicon carbonitride was investigated. The material exhibited an interfacial polarization. Although such a polarization exhibited a sharp decrease in the dielectric constant with frequency, the loss peak from this mechanism was not clearly observed because DC conduction dominated the dielectric loss. On the other hand, a sharp increase in the dielectric constant and loss peak were observed at 350°C at 1kHz, indicating that the interfacial polarization enhanced at elevated temperatures. This interfacial polarization can be attributed to the migration and accumulation of charge carriers at the interface of matrix and free-carbon phases.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2017.06.081