Comparative Study on the Effective Dielectric Constant of the Graded Composites

Abstract:

The effective dielectric constant of the graded composites was calculated with three different methods, namely, the nonlinear differential effective dipole approximation method (NDEDA), the Maxwell-Garnette method (MGT) and the sum rule method (Sum). In each layer of the graded composites, the distribution of the dielectric constant follows a Drude form. Our numerical results show that when the number of layers N inside the graded composites increases, a gradual transition from sharp peaks to an emerging broad continuous band is clearly obtained. Moreover, the results obtained by the MGT and sum rule methods achieve a good agreement with that by the NDEDA method when N is approaching infinity.

• Periodical: Advanced Materials Research (Volume 677)
• Pages: 192-196
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.677.192
• Online since: March 2013
• Authors: Chun Zhen Fan, Jun Qiao Wang, Er Jun Liang
• Keywords: Effective Dielectric Constant, Graded Composites

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