Article ID Journal Published Year Pages File Type
1474249 Journal of the European Ceramic Society 2015 7 Pages PDF
Abstract

Copper/yttrium iron garnet (Cu/Y3Fe5O12) cermets with tailored microstructures were prepared via a facile wet chemical process. The radio-frequency permeability and permittivity spectra of the cermets were investigated in detail. A percolation phenomenon appears with increasing copper contents, and an ultra-low percolation threshold (<5.47 vol%) is obtained. For the cermets below percolation threshold, the frequency dispersion of permittivity is featured with a poly-dispersive Debye type relaxation process. For the cermets above but still near percolation threshold, plasma-like negative permittivity featured with fano-like resonances was obtained. The Cu/Y3Fe5O12 cermet is a potential candidate for electromagnetic cloaking, microwave attenuation and telecommunications, etc.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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