Paraelectric to ferroelectric phase transitions in VDF/HFP copolymers under low electric stress

Author

Latour, M. ; Anis, K.

Author_Institution

Lab. de Phys. Moleculaire et Cristalline, Univ. des Sci. et Tech. du Languedoc, Montpellier, France

Volume

28

Issue

1

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

111

Lastpage

115

Abstract

Paraelectric to ferroelectric phase transition is observed under low electrical fields in vinylidenefluoride/hexafluoropropylene (VDF-HFP) copolymers with 15% HFP molar content. This phase transition detected by thermodepolarization processes and differential scanning calorimetry techniques is confirmed in the present work by X-ray and dielectric measurements. These results show the structural evolution of the copolymer from the a nonpolar to the δ polar configuration, under low electrical fields of 0.5 MV/cm

Keywords

X-ray diffraction examination of materials; ferroelectric materials; ferroelectric transitions; permittivity; polymer blends; thermal analysis; thermally stimulated currents; DSC; TSC; VDF/HFP copolymers; X-ray diffraction spectra; dielectric measurements; differential scanning calorimetry techniques; electrical fields; low electric stress; paraelectric-ferroelectric phase transition; permittivity; structural evolution; thermodepolarization processes; vinylidenefluoride-hexafluoropropylene copolymers; Annealing; Dielectric measurements; Ferroelectric materials; Phase detection; Polarization; Reflection; Resins; Temperature; Thermal stresses; X-ray diffraction;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.192246

Filename

192246