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Measurement of mobility of positive charge carriers in polyethylene

Measurement of mobility of positive charge carriers in polyethylene
Measurement of mobility of positive charge carriers in polyethylene
The presence of space charge in insulation materials has been an issue with respect to their life performance in high voltage application systems. The dynamics of space charge in polymeric materials has been widely examined through a pulse electroacoustic (PEA) method over the decades. Theoretical efforts have also been made to explain the nature of these charge carriers. However their electrical properties are not fully revealed. The transport of charge carriers is directly linked with the conduction mechanism and the underlying trapping characteristics in polymeric insulation materials. In this paper, the velocity of positive charge carriers is measured by observing the transport of positive charge packets in additive-free low density polyethylene using PEA technique. The charge packets are generated using a pulse excitation method, i.e., adding a pulse voltage onto the applied bias dc voltage across the polymer film. The negative differential mobility was observed by inspecting the dependence of the velocity of positive charge packets on the applied electric field.
Zhao, Junwei
b3fc6668-bcfd-4ba3-8c44-809cc7f26727
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Zhao, Junwei
b3fc6668-bcfd-4ba3-8c44-809cc7f26727
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

(2011) Measurement of mobility of positive charge carriers in polyethylene. Dielectrics 2011, United Kingdom. 13 - 15 Apr 2011.

Record type: Conference or Workshop Item (Poster)

Abstract

The presence of space charge in insulation materials has been an issue with respect to their life performance in high voltage application systems. The dynamics of space charge in polymeric materials has been widely examined through a pulse electroacoustic (PEA) method over the decades. Theoretical efforts have also been made to explain the nature of these charge carriers. However their electrical properties are not fully revealed. The transport of charge carriers is directly linked with the conduction mechanism and the underlying trapping characteristics in polymeric insulation materials. In this paper, the velocity of positive charge carriers is measured by observing the transport of positive charge packets in additive-free low density polyethylene using PEA technique. The charge packets are generated using a pulse excitation method, i.e., adding a pulse voltage onto the applied bias dc voltage across the polymer film. The negative differential mobility was observed by inspecting the dependence of the velocity of positive charge packets on the applied electric field.

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More information

Published date: 13 April 2011
Additional Information: Event Dates: 13 - 15 April 2011
Venue - Dates: Dielectrics 2011, United Kingdom, 2011-04-13 - 2011-04-15
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272199
URI: http://eprints.soton.ac.uk/id/eprint/272199
PURE UUID: 2d231bc0-46d4-417d-815f-572815931a69

Catalogue record

Date deposited: 16 Apr 2011 10:54
Last modified: 18 Jul 2017 06:33

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Contributors

Author: Junwei Zhao
Author: George Chen
Author: Paul Lewin

University divisions

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