Influence of charge injection on the formation of remanent polarization in P(VDF-TrFE) copolymers

Author

Bihler, E. ; Neumann, G. ; Eberle, G. ; Eisenmenger, W.

Author_Institution

Phys. Inst., Stuttgart Univ., Germany

fYear

1990

fDate

28-31 Oct 1990

Firstpage

140

Lastpage

145

Abstract

The influence of charge injection on the formation of remanent polarization of P(VDF-TrFE) copolymers was studied by inserting an insulating barrier between the metal electrodes and the P(VDF-TrFE) copolymer during the poling process. The resulting remanent polarization is significantly smaller than that of identically poled samples for the same field strength and time duration, but with directly contacting metal electrodes. This shows that the orientation of the dipoles alone is not a sufficient condition for the formation of remanent polarization in PVDF and its copolymers. The experiments indicate that the stabilization of the polarization is mediated by charge injection and charge trapping at polarized crystallite surfaces

Keywords

dielectric polarisation; polymer blends; P(VDF-TrFE) copolymers; charge injection; charge trapping; field strength; insulating barrier; metal electrodes; polarized crystallite surfaces; poling process; remanent polarization; stabilization; trifluoroethylene; vinylidene fluoride; Capacitance; Crystallization; Dielectric materials; Dielectrics and electrical insulation; Electrodes; Lattices; Piezoelectric films; Piezoelectricity; Polarization; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1990. Annual Report., Conference on

Conference_Location

Pocono Manor, PA

Type

conf

DOI

10.1109/CEIDP.1990.201333

Filename

201333