Influence of Filler Loading on Dielectric Properties of Epoxy-ZnO Nanocomposites

Singha, Santanu and Thomas, MJ (2009) Influence of Filler Loading on Dielectric Properties of Epoxy-ZnO Nanocomposites. In: IEEE Transactions on dielectrics and electrical insulation, 16 (2). pp. 531-542.

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Abstract

Experimental investigations into the dielectric properties of epoxy-ZnO nanocomposites at different filler loadings reveal few unique behaviors (at certain filler loadings) and also advantageous characteristics in contrast to the properties obtained for the corresponding microcomposites. Results demonstrate that in nanocomposites, it is possible to achieve lower values of permittivity and tan delta with respect to unfilled epoxy over a wide frequency range. Analysis of the results attributes this interesting observation to the interaction dynamics between the epoxy chains and the ZnO nanoparticles at the interfacial area. The dc volume resistivities and ac dielectric strengths of nanocomposites were also experimentally determined in the present study and the obtained characteristics are found to be different as compared to the results obtained for microcomposites. The volume fraction and nature of the interfaces in the bulk of the composites seem to influence this difference in the examined dielectric properties of the nanocomposites.

Item Type:	Journal Article
Publication:	IEEE Transactions on dielectrics and electrical insulation
Publisher:	IEEE
Additional Information:	Copyright of this article 2009 belongs to IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Epoxy nanocomposites; dielectrics; permittivity; tan delta; volume resistivity; dielectric strength.
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	21 Aug 2009 10:46
Last Modified:	19 Sep 2010 05:32
URI:	http://eprints.iisc.ac.in/id/eprint/20227

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