Effective electromagnetic properties of microheterogeneous materials with surface phenomena

Valery Levin, Mikhail Markov (), Aleksandr Mousatov, Elena Kazatchenko and Evgeny Pervago
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Valery Levin: Instituto Mexicano del Petróleo
Mikhail Markov: Instituto Mexicano del Petróleo
Aleksandr Mousatov: Instituto Mexicano del Petróleo
Elena Kazatchenko: Instituto Mexicano del Petróleo
Evgeny Pervago: Instituto Mexicano del Petróleo

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 10, 1-16

Abstract: Abstract In this paper, we present an approach to calculate the complex dielectric permittivity of a micro-heterogeneous medium composed of non-conductive solid inclusions embedded into the conductive liquid continuous host. To take into account the surface effects, we approximate the inclusion by a layered ellipsoid consisting of a dielectric core and an infinitesimally thin outer shell corresponding to an electrical double layer (EDL). To predict the effective complex dielectric permittivity of materials with a high concentration of inclusions, we have modified the Effective Field Method (EFM) for the layered ellipsoidal particles with complex electrical properties. We present the results of complex permittivity calculations for the composites with randomly and parallel oriented ellipsoidal inclusions. To analyze the influence of surface polarization, we have accomplished modeling in a wide frequency range for different existing physic-chemical models of double electrical layer. The results obtained show that the tensor of effective complex permittivity of a micro-heterogeneous medium with surface effects has complicate dependences on the component electrical properties, spatial material texture, and the inclusion shape (ellipsoid aspect ratio) and size. The dispersion of dielectric permittivity corresponds to the frequency dependence for individual inclusion of given size, and does not depend on the inclusion concentration.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1140/epjb/e2017-80294-1

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