Abstract
The aim of the work was examination of the dielectric properties of a new type of polymer nanocomposites based on PVDF (polyvinylidene fluoride), or a copolymer P(VDF-HFP) with addition of ferrite nanoparticles. The addition of nanofillers leads not only to the formation of polar ß-phase of PVDF, which shows unique piro-, piezo- and ferroelectric properties used in many applications, but also affects the dielectric and magnetoelectric properties of these nanocomposites. In the work the dielectric properties of polymer composites, such as volume resistivity, permittivity and dielectric loss were investigated Measurements of dielectric parameters were performed in a climate chamber at temperature range of 25-100°C, at selected frequencies in the range 20-200 kHz. The results obtained are valuable not only for an application of this type of nanocomposites in various types of transducers, but also for analysis of the physical phenomena occurring in the polymer composites doped with nanoparticles.
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