In stress space charge probing during ageing of polymeric samples

Author

Lebey, T. ; Laurent, C. ; Mayoux, C.

Author_Institution

Lab. de Genie Electr., Univ. Paul Sabatier, Toulouse, France

fYear

1989

fDate

3-6 Jul 1989

Firstpage

40

Lastpage

44

Abstract

Charge injection is known to occur in the prebreakdown stage in polymeric materials. It has recently been demonstrated that a time-resolved measurement of this charge is possible in a double-needle electrode configuration and under AC voltage using an analog experimental setup with a sensitivity of ≈10^-14 C. A critical field for charge injection has been defined in two polymeric materials (polyethylene and epoxy resin). The authors report data on the temporal evolution of the charge during AC polarization. Results show that continuous space charge injection occurs during ageing of the polymeric samples. Some of the injected carriers are permanently trapped in the dielectric

Keywords

ageing; dielectric polarisation; electric breakdown of solids; organic insulating materials; polymers; space charge; AC polarization; AC voltage; ageing; charge injection; double-needle electrode configuration; epoxy resin; polyethylene; polymeric materials; prebreakdown stage; sensitivity; space charge injection; stress space charge probing; temporal evolution; time-resolved measurement; Aging; Charge measurement; Current measurement; Dielectric materials; Electrodes; Polyethylene; Polymers; Space charge; Stress; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on

Conference_Location

Trondheim

Type

conf

DOI

10.1109/ICSD.1989.69158

Filename

69158