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(a) SEM micrographs of CF and (b) fractured cross-surface morphology of the CF/PVDF composites with 0.056 volume fraction of CF.
Variation of the dielectric constant of the CF/PVDF composites on the volume fraction of CF at , and the inset in Fig. 2 shows fit of the dielectric constant to Eq. (1). The right side of Fig. 2 is the schematic images to show the formation of microcapacitors and the conductive network with the increasing concentration of CF.
Dependence of the (a) dielectric constant, (b) dielectric loss tangent, and (c) conductivity on frequency at room temperature.
Temperature dependence of dielectric constant of the CF/PVDF composites at different frequencies.
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