TY - GEN
T1 - Induced anisotropy in electrically modified polymer/ceramic nanocomposites
AU - Tomer, V.
AU - Kostelnick, J.
AU - Polizos, G.
AU - Manias, Evangelos
AU - Randall, Clive A.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - 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.
AB - 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.
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U2 - 10.1109/ISAF.2008.4693734
DO - 10.1109/ISAF.2008.4693734
M3 - Conference contribution
AN - SCOPUS:58149525834
SN - 1424427444
SN - 9781424427444
T3 - IEEE International Symposium on Applications of Ferroelectrics
BT - 17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
T2 - 17th IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2008
Y2 - 23 February 2008 through 28 February 2008
ER -