Novel polymer composites of RuO2@nBaTiO3/PVDF with a high dielectric constant |
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Affiliation: | 1. Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand |
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Abstract: | The dielectric properties of a novel polymer dielectric material were investigated. The conductive phase of RuO2 was synthesized for deposition on the surface of a nanosized BaTiO3 (nBT). The RuO2@nBT hybrid particles were incorporated into a poly (vinylidene fluoride) (PVDF) as a three-phase composite (RuO2@nBT/PVDF). The obtained dielectric constant (ε′) was significantly high (3837.16) for the composite with a volume fraction of = 0.50. The large interfacial polarization between the RuO2?nBT and RuO2?PVDF interfaces considerably increased the value of ε′. Therefore, interfacial polarization is a critical factor in improving the dielectric properties. The dielectric behavior of the RuO2@nBT/PVDF composites can be described using the effective medium percolation theory model, which indicates the significant contributions of the conductive RuO2 phase and high-permittivity nBT phase. |
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Keywords: | Ruthenium dioxide Barium titanate Poly(vinylidene fluoride) Dielectric materials |
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