A dissociation-injection model for non-polar liquid conduction and wire-cylinder geometry

Author

Pontiga, F. ; Castellanos, A.

Author_Institution

Dipt. de Electron. y Electromagnetismo, Facultad de Fisica, Seville, Spain

Volume

4

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

224

Lastpage

237

Abstract

The conduction of a nonpolar liquid filling a cylindrical capacitor has been investigated with a model that includes both the dissociation of ionic pairs in the bulk of the liquid and charge injection at the inner electrode. Three different cases, of increasing complexity, have been analyzed. Firstly, injection has been neglected and the dissociation rate has been taken as constant. Then, the effect of the electric field on the dissociation rate has been considered. And, finally, a field dependent injection of charge has been also included in the model. The current voltage characteristics corresponding to these three models have been evaluated for different ratios of the electrodes radii. Approximate analytical expressions are provided for the charge density and electric field distributions over a wide range of parameters of physical interest

Keywords

capacitors; dielectric liquids; dissociation; electrical conductivity; charge density; charge injection; current voltage characteristics; cylindrical capacitor; dissociation-injection model; electric field; ionic pair dissociation; nonpolar liquid conduction; wire-cylinder geometry; Capacitors; Charge carriers; Conductivity; Dielectric liquids; Electrodes; Electromagnetic modeling; Electrostatics; Filling; Geometry; Solid modeling;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.595251

Filename

595251