Dielectric behaviour of polycarbonate

被引：15

作者：

ElShabasy, M

Riad, AS

机构：

[1] Physics Department, Faculty of Science, Minia University, Minia

来源：

PHYSICA B | 1996年 / 222卷 / 1-3期

关键词：

D O I：

10.1016/0921-4526(96)00024-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dielectric constant and the dielectric loss of polycarbonate are investigated in the frequency range 30-10(5) Hz and at temperature from 297 to 365 K. The frequency dependence of the impedance spectra plotted in the complex plane shows semicircles. The system could be represented by an equivalent circuit of a bulk resistance in series with a parallel surface resistance-capacitance combination. The Cole-Cole diagrams have been used to determine the molecular relaxation time tau. The temperature dependence of tau is expressed by a thermally activated process. Analysis of the AC conductivity reveals semiconducting features based predominantly on a hopping mechanism.

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收藏

页码：153 / 159

页数：7

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