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Determination of threshold electric field for charge injection in polymeric materials

Determination of threshold electric field for charge injection in polymeric materials
Determination of threshold electric field for charge injection in polymeric materials
Accurately determining the threshold electric field at which charge injection from the electrodes starts is important for reliable operation of dielectric materials as the presence of charge in the material can lead to electric field enhancement, resulting in degradation and early failures of the material. The two methods in charge measurements that have been commonly used to find out the threshold field have been compared to the proposed method, which overcomes the drawbacks of the two methods. Such method offers (i) high sensitivity as the effect of capacitive charge has been eliminated and (ii) contributions from both mobile and slow charges; hence, providing a more accurate value for the threshold electric field. Based on the proposed method, it has been found that the threshold field for low density polyethylene is around 8 kV/mm, which is lower than the
reported value obtained from the other methods
0003-6951
192901
Liu, Ning
b4cdf4f9-bc5e-46c5-bd88-ed4d29074a85
Zhou, Churui
77e0c36e-72cf-4169-9e46-14e87dc37c9c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhong, Lisheng
255706e0-8092-4cac-a05b-94167a66729a
Liu, Ning
b4cdf4f9-bc5e-46c5-bd88-ed4d29074a85
Zhou, Churui
77e0c36e-72cf-4169-9e46-14e87dc37c9c
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhong, Lisheng
255706e0-8092-4cac-a05b-94167a66729a

Liu, Ning, Zhou, Churui, Chen, George and Zhong, Lisheng (2015) Determination of threshold electric field for charge injection in polymeric materials. Applied Physics Letters, 106, 192901. (doi:10.1063/1.4921050).

Record type: Article

Abstract

Accurately determining the threshold electric field at which charge injection from the electrodes starts is important for reliable operation of dielectric materials as the presence of charge in the material can lead to electric field enhancement, resulting in degradation and early failures of the material. The two methods in charge measurements that have been commonly used to find out the threshold field have been compared to the proposed method, which overcomes the drawbacks of the two methods. Such method offers (i) high sensitivity as the effect of capacitive charge has been eliminated and (ii) contributions from both mobile and slow charges; hence, providing a more accurate value for the threshold electric field. Based on the proposed method, it has been found that the threshold field for low density polyethylene is around 8 kV/mm, which is lower than the
reported value obtained from the other methods

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Accepted/In Press date: 30 April 2015
Published date: 11 May 2015
Organisations: EEE

Identifiers

Local EPrints ID: 380075
URI: http://eprints.soton.ac.uk/id/eprint/380075
ISSN: 0003-6951
PURE UUID: b2e99114-c965-4ea0-bfad-861ec2966024

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Date deposited: 03 Sep 2015 09:23
Last modified: 16 Dec 2019 20:15

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Contributors

Author: Ning Liu
Author: Churui Zhou
Author: George Chen
Author: Lisheng Zhong

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