High dielectric performance of polymer composites based on BaTiO3-supporting Ag hybrid fillers

The dielectric properties of the polyvinylidene fluoride (PVDF) composites filled with BaTiO₃-supporting Ag (BT-Ag) hybrid particles were investigated. The BT-Ag/PVDF composites exhibited a high dielectric permittivity of 160 and relatively low dielectric loss of 0.146 at 100 Hz when the concentration of BT-Ag hybrid fillers approached 55.28 vol. %. The high permittivity was mainly ascribed to the coupling effect of Ag nanoparticles with PVDF matrix. The isolated Ag nanoparticles on the surface of BT avoided the formation of conductive path or agglomeration of Ag effectively, thus resulting in low dielectric loss of the BT-Ag/PVDF composites.