Optoelectrical properties of epoxy/silica nanocomposites

被引：4

作者：

Alzubi, R. ^{[1
]}

Juwhari, H. ^{[1
]}

Zihlif, A. ^{[1
]}

Ragosta, G. ^{[2
]}

机构：

[1] Univ Jordan, Dept Phys, Amman, Jordan

[2] CNR, Inst Chem & Polymer Technol, I-80125 Naples, Italy

来源：

MATERIALS TECHNOLOGY | 2010年 / 25卷 / 01期

关键词：

Nanocomposite; Silica; Energy gap; Dielectric; Conductivity; CARBON NANOTUBES;

D O I：

10.1179/175355509X447203

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanosilica/epoxy composites were prepared with different silica concentrations (0, 3, 5, 10 and 15 wt-%). The optical and electrical properties of the prepared composites were investigated as a function of filler content, temperature and applied electric field frequency. The obtained optical data were analysed in terms of absorption formula for non-crystalline materials. Both the optical energy gaps and the width of the energy tails of the localised states have exhibited silica concentration dependence. It has been observed that electrical quantities such as the AC conductivity, measured using the impedance spectroscopy and the dielectric constants, vary with the applied frequency, silica concentrations and temperature. In addition, the relaxation time and activation energy for the thermal conduction processes were calculated and reported.

引用

页码：14 / 18

页数：5

共 22 条

[1] Nanocomposite electrolytes with fumed silica in poly(methyl methacrylate): thermal, rheological and conductivity studies [J].