Please use this identifier to cite or link to this item: http://dx.doi.org/10.18419/opus-4959
Authors: Eberle, Gernot
Bihler, Eckardt
Eisenmenger, Wolfgang
Title: Polarization dynamics of VDF-TrFE copolymers
Issue Date: 1991
metadata.ubs.publikation.typ: Zeitschriftenartikel
metadata.ubs.publikation.source: IEEE transactions on electrical insulation 26 (1991), S. 69-77. URL http://dx.doi.org./10.1109/14.68230
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-56129
http://elib.uni-stuttgart.de/handle/11682/4976
http://dx.doi.org/10.18419/opus-4959
Abstract: The polymer polyvinylidenefluoride (PVDF) and its copolymers with trifluoroethylene (TrFE) exhibit a strong piezoelectric effect after poling in high electric fields (100 MV/m). HV impulses of definite duration have been applied to the polymer in order to study the dynamics of the poling process. The dielectric displacement during the HV impulse was recorded. After the impulse, the remanent polarization under short-circuit conditions was also measured. It was thus possible to obtain the minimum poling time dependent on the applied field strength necessary to stabilize the remanent polarization. Comparing the time development of the dielectric displacement with the corresponding remanent polarization revealed a time delay between the orientation of the dipoles and their stabilization. It is concluded that the process of orientation of the dipoles itself is not sufficient to lead to a remanent polarization and that an additional interaction between the trapped charges and the oriented dipoles can explain the stability of the remanent polarization and the observed time delay.
Appears in Collections:08 Fakultät Mathematik und Physik

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