High dielectric permittivity in silica-polyaniline nanocomposites

被引：7

作者：

Dutta, K ^{[1
]}

De, SK ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Jadavpur 700032, Kolkata, India

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2006年 / 6卷 / 02期

关键词：

polyaniline nanocomposites; high dielectric constant;

D O I：

10.1166/jnn.2006.091

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Complex impedance and dielectric permittivity of wide band gap silica-conducting polyaniline nanocomposite have been investigated as a function of frequency and temperature at different compositions. Grain and grain boundary contributions are observed in impedance spectra. The results are interpreted in terms of two series connected equivalent circuit. The large dielectric permittivity similar to 7500 is found. Large value of permittivity is well described by Maxwell-Wagner polarization. Broad and asymmetric dielectric spectra are analyzed by Havriliak-Negami relaxation function.

引用

页码：499 / 504

页数：6

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