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

fYear

1988

fDate

1-3 Sep 1988

Firstpage

487

Lastpage

492

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)

Conference_Location

Oxford

Type

conf

DOI

10.1109/ISE.1988.38608

Filename

38608