Characterization of percolation behavior in conductor–dielectric 0-3 composites

Journal of Advanced Dielectrics

Zhi-Min Dang¹  Lin Zhang²  Patrick Bass²  Z.-Y. Cheng² 

[1] Laboratory of Dielectric Polymer Materials and Devices, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China;Materials Research and Education Center, Auburn University, Auburn AL 36849, USA;

关键词: Composite;    dielectric constant;    percolation;    threshold;    conductivity;   

DOI  :  10.1142/S2010135X14500350

来源: DOAJ

【 摘 要 】

The equation εeff ∝ (ϕc - ϕ)-s which shows the relationship between effective dielectric constant (εeff) and the filler concentration (φ), is widely used to determine the percolation behavior and obtain parameters, such as percolation threshold φc and the power constant s in conductor–dielectric composites (CDCs). Six different systems of CDCs were used to check the expression by fitting experimental results. It is found that the equation can fit the experimental results at any frequency. However, it is found that the fitting constants do not reflect the real percolation behavior of the composites. It is found that the dielectric constant is strongly dependent on the frequency, which is mainly due to the fact that the frequency dependence of the dielectric constant for the composites close to φc is almost independent of the matrix.

【 授权许可】

Unknown