Constant-current corona charging of biaxially stretched PVDF films in humidity-controlled atmospheres

Author

Ribeiro, P.A. ; Raposo, M. ; Marat-Mendes, J.N. ; Giacometti, J.A.

Author_Institution

Faculdade de Ciencia e Tecnologia, Univ. Nova de Lisboa, Portugal

Volume

27

Issue

4

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

744

Lastpage

750

Abstract

A special version of a constant current corona triode has been developed for charging samples in controlled atmospheres. Measurements performed on biaxially stretched polyvinylidenefluoride (PVDF) samples show that the buildup of the surface potential is dependent on air humidity. In a dry air atmosphere, the polarization clearly shows the ferroelectric behavior of the PVDF sample. For samples charged under humid conditions, the surface potential vs. time curves pass through a maximum value which decreases with increasing relative humidity. A tentative explanation for the surface potential dependence on the humidity is given, based on the increase in conductivity originating from the dissociated water molecules absorbed into the sample

Keywords

corona; dielectric polarisation; polymer films; surface potential; biaxially stretched PVDF films; charging; conductivity; constant current corona triode; dissociated water molecules; ferroelectric behavior; humidity-controlled atmospheres; polarization; surface potential; Atmosphere; Atmospheric measurements; Conductivity; Corona; Ferroelectric films; Ferroelectric materials; Humidity measurement; Performance evaluation; Polarization; Surface charging;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.155791

Filename

155791