A new method to study processes of corona charging and electric relaxation in electrets

Author

Sergeeva, Alexandra ; Fedosov, Sergei ; Pribbe, Sergei

Author_Institution

Odessa Technol. Inst., Ukraine

fYear

1994

fDate

7-9 Sep 1994

Firstpage

43

Lastpage

48

Abstract

The idea of the proposed method is in the analysis of the experimentally obtained response (electret potential) of the dielectric sample on application of the rectangular current pulses of infra-low frequency. The current is supplied by a corona, and the whole process of the poling (electrization) splits into a number of separate fractions, each consisting of the stage of the potential growth under the constant charging current and the stage of the potential decay in the gap between the two adjacent current pulses. The corresponding formulae are derived allowing to follow the dynamics of the dielectric constant and the apparent conductivity with evolution of the poling process. The method is applied to study corona charging and electric relaxation in PVDF, although it is applicable in principle to any dielectric with a reasonable apparent conductivity

Keywords

corona; dielectric polarisation; dielectric relaxation; electrets; electric breakdown; permittivity; polymers; surface charging; PVDF; apparent conductivity; corona charging; dielectric constant; electret potential; electrets; electric relaxation; electrization; infra-low frequency; poling; rectangular current pulses; Conductivity; Corona; Current supplies; Dielectric constant; Dielectric measurements; Electrets; Electrodes; Frequency; Surface charging; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1994. (ISE 8), 8th International Symposium on

Conference_Location

Paris

Print_ISBN

0-7803-1940-0

Type

conf

DOI

10.1109/ISE.1994.514741

Filename

514741