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Eur. Phys. J. Appl. Phys. 46, 32604 (2009)
DOI: 10.1051/epjap/2009022
Effective parameters of metal-dielectric composites: influence of eddy currents due to density fluctuations
A.P. Vinogradov1, N. Burokur2 and S. Zouhdi21 Institute of Theoretical and Applied Electromagnetism (ITAE), Russian Academy of Sciences, Izhorskaya 13/19, 127412 Moscow, Russia
2 Laboratoire de Génie Électrique de Paris, Plateau de Moulon, 91192 Gif-Sur-Yvette Cedex, France
said.zouhdi@u-psud.fr
Received: 16 April 2008 / Received in final form: 1st December 2008 / Accepted: 5 January 2009 / Published online: 10 March 2009
Abstract
It is shown that the space fluctuations of concentration
of conducting inclusions might be responsible for the well-known
disagreement between theory and experiment at determining microwave losses
in metal-dielectric mixture: the theories (percolation theory, effective
medium theory, etc.) predict much lower losses than those measured in
experiment. It is demonstrated that if the effective skin depth in the
regions occupied by the fluctuation is comparable to the mean diameter of
these regions we can expect additional losses.
72.80.Tm - Composite materials.
73.43.Cd - Theory and modeling.
© EDP Sciences 2009
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