Thermally stimulated discharge of UV-irradiated corona-charged Teflon FEP films

Author

Da Cunha, H. Nunes ; Moreno, R.A.

Author_Institution

Inst. de Fisica e Quimica, Sao Paulo Univ., Sao Carlos, Brazil

Volume

27

Issue

4

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

708

Lastpage

713

Abstract

UV-irradiated Teflon FEP films, one side metallized and negatively corona charged, show peak shifts in their thermally stimulated discharge (TSD) curves as compared with those of unirradiated samples. They are practically discharged after the first TSD process, indicating that UV irradiation enables the contact to inject positive charge. Heat pulse records confirm positive injection from the UV irradiated contact. Positively charged films, UV irradiated, have a residual potential larger than the unirradiated ones and also show peak shifts in their TSD thermograms. Results for both polarities are shown for different metallic contacts

Keywords

corona; polymer films; surface discharges; thermally stimulated currents; TSD process; Teflon FEP films; UV irradiation; heat pulse records; metallic contacts; negatively corona charged; peak shifts; positive charge; residual potential; thermally stimulated discharge; thermograms; Circuit stability; Contacts; Corona; Electrodes; Filters; Heating; Lamps; Ovens; Surface treatment; Temperature control;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.155787

Filename

155787