| Abstract |
High-permittivity (In1/2Nb1/2)0.1Ti0.9O2 particles and nano Ag-deposited (In1/2Nb1/2)0.1Ti0.9O2 hydride particles, which were respectively prepared by solid state reaction and seed-mediated growing process methods, were used as fillers to enhance the dielectric permittivity of poly(vinylidene fluoride) (PVDF) polymer. Nano Ag-deposited (In1/2Nb1/2)0.1Ti0.9O2 hydride particles were systematically characterized by Raman, XRD, SEM, TEM, and XPS techniques. Three-phase nano Ag-deposited (In1/2Nb1/2)0.1Ti0.9O2/PVDF polymer composites as well as two-phase (In1/2Nb1/2)0.1Ti0.9O2/PVDF composites with different volume fractions of fillers (f) were fabricated. Interestingly, the dielectric properties of three-phase composites were better than that of the two-phase composites. The dielectric loss tangent of three-phase composites was greatly reduced compared to that of two-phase composites, while their enhanced dielectric permittivity values slightly changed. These results indicated to the important role of Ag nanoparticles, which were discretely grown on the surface of (In1/2Nb1/2)0.1Ti0.9O2 particles, to suppress the loss tangent in PVDF polymer composites. The three-phase composite with f = 0.5 exhibited low loss tangent of 0.05 with greatly enhanced dielectric permittivity of 100, which was higher than that of a pure PVDF polymer by a factor of 10. The dielectric behavior was described based on the interfacial polarization with suppressing conduction path in PVDF polymer matrix |
Publication
Journal Publication
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