Title :
Thermally stimulated currents of corona treated Teflon-FEP electrets
Author :
Dias, C.J. ; Marat-Mendes, J.N. ; Giacometti, J.A.
Author_Institution :
Fac. de Ciencias e Tecnologia, Univ. Nova de Lisboa, Monte da Caparica, Portugal
Abstract :
Thermally stimulated currents of corona-charged Teflon FEP electrets show a single peak around 210°C short polarization times. However, when the polarization time or the corona current is increased, changes either in the maximum or in the position of the peak occur. At the same time a broad current band in the range between 100-180°C appears, while a liquid is formed over the electret surface. Measurements of the charged centroid show no detectable change in the location. The results are tentatively explained in terms of surface traps becoming shallower
Keywords :
corona; dielectric polarisation; electrets; electron traps; hole traps; organic compounds; polymers; surface electron states; thermally stimulated currents; 100 to 100 degC; 210 degC; TSC; broad current band; charged centroid; corona treated Teflon-FEP electrets; polarization time; polymer; single peak; surface traps; thermally stimulated currents; Charge measurement; Circuits; Corona; Current measurement; Electrets; Polymers; Surface charging; Surface discharges; Surface treatment; Voltage;
Conference_Titel :
Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)
Conference_Location :
Oxford
DOI :
10.1109/ISE.1988.38608
