Influence of polarisation on breakdown strength of polymeric composite dielectrics

Author

Gefie, O.S. ; Lebedev, S.M. ; Pokholkov, Y.P. ; Agoris, D.P. ; Vitellas, I.

Author_Institution

Tomsk Polytech. Univ., Russia

Volume

148

Issue

3

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

125

Lastpage

128

Abstract

The results of a study of electrical characteristics such as permittivity ε, loss factor tanδ and breakdown strength E _b of new composite materials on the basis of polyvinylchloride filled with ferroelectric ceramic powder PZT are presented. It is shown that preliminary polarisation of composite materials by unipolar impulses of voltage enables the E_b of composites to be increased by a factor of 1.3-1.5 in comparison with nonpolarised composites. It is discovered that the value of the specific accumulated energy may be increased up to 10⁵ J/m³. These composite materials can be used both for the electric field control in the insulation designs and for manufacture of capacitive stores of energy

Keywords

dielectric losses; dielectric polarisation; electric strength; ferroelectric ceramics; filled polymers; permittivity; space charge; PZT; PbZrO3TiO3; accumulated energy; breakdown strength; capacitive stores; composite materials; electric field control; electrical characteristics; energy stores; ferroelectric ceramic powder PZT; insulation designs; loss factor; nonpolarised composites; permittivity; polarisation; polymeric composite dielectrics; polyvinylchloride; unipolar impulses;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:20010484

Filename

935779