Modelization of the Impedance Spectroscopy of composites by Electrical Networks

TL;DR

This paper investigates how inter-grain distributions and sample size influence the impedance spectra of metal-insulator composites, revealing stability in impedance characteristics for sufficiently large samples.

Contribution

It introduces a model for impedance spectroscopy of composites considering inter-grain distributions and scaling effects, highlighting the stability of impedance spectra at large sample sizes.

Findings

Impedance spectra stabilize for samples larger than 200x200.

Characteristic frequencies depend on inter-grain distribution.

Sample size affects the frequency dependence of impedance.

Abstract

We examined in this work the effect of the inter-grains distributions as well as the scaling of the complex impedance in order to analyze its frequency dependance for composite metal-insulator films. The dependance of the characteristic frequencies on the inter-grain distribution is shown for large sample sizes. The impedance spectra become statistically stable above sizes of the order 200x200.