Induced anisotropy in electrically modified polymer/ceramic nanocomposites

V. Tomer, J. Kostelnick, G. Polizos, Evangelos Manias, Clive A. Randall

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polymer/Ceramic composites with controlled spatial distribution of fillers are synthesized, and the corresponding changes in their properties are studied. Using dielectrophoretic assembly we create anisotropic composites of aligned BaTiO3 particles in silicone elastomer, and study their electrical properties as a function of ceramic volume fraction, connectivity and composite morphology. We investigate these composites for a variety of electrical properties i.e. permittivity, d.c. conduction, dielectric breakdown and energy density. The energy density of these electric-field-structured composites is found to be highly dependent on the anisotropy present in the system. This study emphasizes the important role of conductivity, permittivity, and particularly local cluster distribution in controlling high field dielectric behavior. Designed anisotropy in dielectric properties can provide new paradigms for the development of high energy density materials and gain important insights into the mechanisms that control dielectric breakdown strengths and non-linear conduction at high fields in polymer/ceramic composites.

Original languageEnglish (US)
Title of host publication17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
DOIs
StatePublished - Dec 1 2008
Event17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008 - Santa Fe, NM, United States
Duration: Feb 23 2008Feb 28 2008

Publication series

NameIEEE International Symposium on Applications of Ferroelectrics
Volume3

Other

Other17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
CountryUnited States
CitySanta Fe, NM
Period2/23/082/28/08

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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