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Experimental demonstration of deep traps in silica-based polyethylene nanocomposites by combined isothermal surface potential decay and pulsed electro-acoustic measurements

Experimental demonstration of deep traps in silica-based polyethylene nanocomposites by combined isothermal surface potential decay and pulsed electro-acoustic measurements
Experimental demonstration of deep traps in silica-based polyethylene nanocomposites by combined isothermal surface potential decay and pulsed electro-acoustic measurements
The ability to suppress space charge accumulation at high electric fields makes nanocomposites attract significant research interest as potential insulation materials in high-voltage direct current cable development. At present, the deep trap introduced by nanoparticles is frequently applied to be responsible for the observed space charge suppression in nanocomposites. However, the experimental results that support deep-trap formation have not been rigorously examined. We therefore propose herein a simple and more direct approach based on isothermal surface potential decay combined with pulsed electro-acoustic measurements to verify the presence of deep traps in silica-based blend polyethylene nanocomposites. The results indicate that the deep traps are indeed introduced by filling nanosilica and the space charge suppression observed in the nanocomposite with a low loading ratio is caused by deeply trapped charges in the sub-surface region of specimens.
0003-6951
Wang, Yan
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Hao, Miao
181e8cd2-9050-412f-8234-6aa0ecec23f2
Xu, Zhiqiang
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Qiang, Dayuan
2a64f637-fc33-4722-ab29-4e8fd60895a1
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3
Wang, Yan
f64021d0-1658-417b-93a7-b59055bd76f9
Hao, Miao
181e8cd2-9050-412f-8234-6aa0ecec23f2
Xu, Zhiqiang
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Qiang, Dayuan
2a64f637-fc33-4722-ab29-4e8fd60895a1
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Vaughan, Alun
6d813b66-17f9-4864-9763-25a6d659d8a3

Wang, Yan, Hao, Miao, Xu, Zhiqiang, Qiang, Dayuan, Chen, George and Vaughan, Alun (2018) Experimental demonstration of deep traps in silica-based polyethylene nanocomposites by combined isothermal surface potential decay and pulsed electro-acoustic measurements. Applied Physics Letters, 113, [022904]. (doi:10.1063/1.5025633).

Record type: Letter

Abstract

The ability to suppress space charge accumulation at high electric fields makes nanocomposites attract significant research interest as potential insulation materials in high-voltage direct current cable development. At present, the deep trap introduced by nanoparticles is frequently applied to be responsible for the observed space charge suppression in nanocomposites. However, the experimental results that support deep-trap formation have not been rigorously examined. We therefore propose herein a simple and more direct approach based on isothermal surface potential decay combined with pulsed electro-acoustic measurements to verify the presence of deep traps in silica-based blend polyethylene nanocomposites. The results indicate that the deep traps are indeed introduced by filling nanosilica and the space charge suppression observed in the nanocomposite with a low loading ratio is caused by deeply trapped charges in the sub-surface region of specimens.

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Accepted/In Press date: 14 June 2018
e-pub ahead of print date: 13 July 2018
Published date: 2018

Identifiers

Local EPrints ID: 422873
URI: http://eprints.soton.ac.uk/id/eprint/422873
ISSN: 0003-6951
PURE UUID: f1b4ec8f-8305-4137-a59c-cb58faab3f2c
ORCID for Zhiqiang Xu: ORCID iD orcid.org/0000-0002-6640-7335
ORCID for Alun Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

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Date deposited: 07 Aug 2018 16:30
Last modified: 18 Feb 2021 17:14

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Contributors

Author: Yan Wang
Author: Miao Hao
Author: Zhiqiang Xu ORCID iD
Author: Dayuan Qiang
Author: George Chen
Author: Alun Vaughan ORCID iD

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