AC conductivity and dielectric constant of poly(vinyl alcohol) doped with MnSO4

被引：59

作者：

Mohamed, RI ^{[1
]}

机构：

[1] Al Azhar Univ, Fac Sci, Cairo, Egypt

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2000年 / 61卷 / 08期

关键词：

polymers; intermetallic compounds; electrical conductivity; electrical properties; thin films;

D O I：

10.1016/S0022-3697(99)00390-X

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

AC conductivity of poly(vinyl alcohol) polymer modified by MnSO4 with different concentration from 100 Hz to 100 KHz in the temperature range 293-343 K is reported. Obtained data reveal that AC conductivity is proportional to omega(s) in all compositions (5, 10, 15, 20% MnSO4 by weight). The value of sigma(AC)(omega) depends linearly on the frequency, with slope S ranging between 0.95 and 0.65. The value of S was found to be temperature dependent, which decreases by increasing temperature. This suggests that the Correlated Barrier Hopping model is the most likely mechanism. Moreover, W-M the polaron binding energy, W the height of coulomb barrier, R the hopping distance, R-min the minimum hopping distance, and E-a the activation energy were calculated and found to be composition dependent. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1357 / 1361

页数：5

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