Electrical characterization of epoxy insulators by the study of the surface potential decay and return: a new interpretation by polarization processes
- 1 January 1992
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 251-255
- https://doi.org/10.1109/icsd.1992.224998
Abstract
The authors investigate the surface potential decay after charge is deposited, and its return after surface neutralization, via polarization measurements on thick epoxy samples showing no surface conductivity. They find that the classical representation of charge injection into the volume does not fit the experiments; the main factor responsible for the decay is the presence of slow polarization phenomena. Slow polarization processes occurred in the volume under the influence of the deposited charge, which remained trapped on the surface. These polarization processes account well for the potential decay and return measurements on nonaged samples, and they can be interpreted as an absorption current which follows the classical power law.<>Keywords
This publication has 13 references indexed in Scilit:
- On the Return-Voltage Buildup in Insulating MaterialsIEEE Transactions on Electrical Insulation, 1987
- The interpretation of potential decay on the surface of a charged dielectric specimensJournal of Physics D: Applied Physics, 1987
- Interpretation of surface potential kinetics in HDPE by a trapping modelJournal of Physics D: Applied Physics, 1985
- On the determination of electrical conductivity in polyethyleneJournal of Physics D: Applied Physics, 1981
- Nature of transient currents in polymersJournal of Applied Physics, 1978
- Electrical conduction and polarisation phenomena in polymeric dielectrics at low fieldsJournal of Physics D: Applied Physics, 1978
- Decay of electrical charge on polyethylene filmsJournal of Physics D: Applied Physics, 1977
- Surface-potential decay in insulators with field-dependent mobility and injection efficiencyJournal of Applied Physics, 1975
- Relaxation of surface chargeJournal of Physics C: Solid State Physics, 1975
- Decay of Static Electrification by Conduction Processes in PolyethyleneJournal of Applied Physics, 1970