Revisiting the percolation phenomena in dielectric composites with conducting fillers

被引：38

作者：

Zhang, Lin ^{[1
]}

Bass, Patrick ^{[1
]}

Cheng, Z. -Y. ^{[1
]}

机构：

[1] Auburn Univ, Mat Res & Educ Ctr, Auburn, AL 36849 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 04期

关键词：

CRITICAL-BEHAVIOR; CONSTANT; THRESHOLD; POLYMERS;

D O I：

10.1063/1.4892000

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The composition (phi) dependence of the effective dielectric constant (epsilon(eff)) on conductor-dielectric composites is widely described as epsilon(eff) alpha(phi(c) - phi)(-s). This relationship has been extensively used to fit experimental results for determining the percolation behavior (percolation threshold phi(c) and power constant s). The equation was checked using experimental results from two 0-3 nanocomposite systems with uniform microstructures. It is found that the equation can be used to fit the experimental results, but the fitting constants (phi(c) and s) do not reflect the percolation behavior: the values of both fitting constants are dependent on the frequency (f) and temperature selected. It is also found that the fitting constant phi(c) increases with increasing frequency selected and it is believed that this arises from the critical phenomenon, epsilon eff alpha f(gamma-1), for composites close to the phi(c). (C) 2014 AIP Publishing LLC.

引用

页数：4

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