Title :
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
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;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on
Conference_Location :
Trondheim
DOI :
10.1109/ICSD.1989.69158
