Time development of multiple polarization zones in PVDF

Author

Eberle, G. ; Eisenmenger, W.

Author_Institution

I. Phys. Inst., Stuttgart Univ.

fYear

1993

fDate

31 Oct-3 Nov 1993

Firstpage

529

Abstract

The polarization distribution in PVDF which causes the piezo- and pyroelectricity of this polymer depends strongly on the polarization distribution. Applying an electric field of E=60 MV/m causes a ca. 10 μm thick polarization zone in the middle of the sample. Applying the same field in opposite direction a bimorph structure results. If the same field is applied to a homogeneously prepolarized PVDF sample a trimorph structure is formed with three polarization zones under field. But under short circuit conditions the polarization zone in the new field direction vanishes. The polarization distribution is measured with the acoustic PPS method with a spatial resolution of about 2 μm

Keywords

dielectric polarisation; piezoelectric materials; polymers; pyroelectricity; PVDF; acoustic PPS method; bimorph structure; multiple polarization zones; piezoelectricity; polarization distribution; polymer; pyroelectricity; short circuit conditions; spatial resolution; time development; trimorph structure; Circuits; Crystallization; Electrodes; Impedance; Piezoelectric films; Piezoelectric polarization; Pyroelectricity; Spatial resolution; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1993. Proceedings., IEEE 1993

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1993.339554

Filename

339554