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The intention of this paper is to investigate the residual polarization in PVDF and its interrelation with pyroelectricity by comparing simultaneously measured pyroelectric and fractional thermally stimulated current (TSDC) currents and to clarify the role of charges in these processes.
The study of electrical properties of poly (ethylene terephthalate), (PET), has attracted great interest since it is used in commercial applications such as insulation in capacitors and as a charge storage device in foil electret transducers. For an accurate evaluation of its insulating and electret qualities the underlying physical mechanisms for charge transport have to be understood. Two processes...
The results presented in this paper reveal a number of interesting features of the poling of PVDF: Room-temperature poling yields, depending on the applied field, no polarization at all or a spatially uniform polarization. In contrast, poling at elevated temperatures yields generally a nonuniform polarization with the poled region located close to the positive electrode at low fields, but extending...
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