Study of space charge effects in polyethylene by thermal-pulse current techniques

Author

Ieda, Mirai ; Mizutani, T. ; Suzuoki, Y. ; Yokota, Y.

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

Volume

25

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

509

Lastpage

514

Abstract

Effects of oxidation on space-charge formation, carrier injection, and electrical conduction in polyethylene (PE) are studied by using thermal pulse current and thermally stimulated current (TSC) techniques. Oxidation increases the conduction current by a few orders of magnitude and negative homo space charge is formed near the cathode. The introduction of an oxidized PE layer on the surface of unoxidized PE enhances both electron and hole injection. The enhanced electron injection predominates over the hole injection and plays an important role in the increase of conduction with oxidation. The negative homo space charge is released at ≈40°C and gives rise to a TSC peak

Keywords

organic insulating materials; oxidation; polymers; space-charge-limited conduction; thermally stimulated currents; TSC peak; carrier injection; electrical conduction; electron injection; hole injection; negative homo space charge; oxidation; polyethylene; space charge effects; thermal-pulse current techniques; thermally stimulated current; Cathodes; Charge carrier processes; Electric breakdown; Energy measurement; Oxidation; Polyethylene; Space charge; Thermal conductivity; Thermal engineering; Thickness measurement;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.55724

Filename

55724