Novel polymer composites of RuO2@nBaTiO3/PVDF with a high dielectric constant

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 (epsilon') was significantly high (3837.16) for the composite with a volume fraction of f(RuO2@nBT) = 0.50. The large interfacial polarization between the RuO2-nBT and RuO2-PVDF interfaces considerably increased the value of epsilon'. 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.

Automated summary

The dielectric properties of a novel polymer dielectric material were investigated by incorporating conductive RuO2 and high-permittivity nBT into PVDF. The interfacial polarization between RuO2-nBT and RuO2-PVDF interfaces played a critical role in improving the dielectric properties of the composites.