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Effect of gamma-ray irradiation on trap characteristics of polyethylene based micro/nanocomposites

Effect of gamma-ray irradiation on trap characteristics of polyethylene based micro/nanocomposites
Effect of gamma-ray irradiation on trap characteristics of polyethylene based micro/nanocomposites

As the main insulating material of nuclear power plant cables, polyethylene is exposed to high temperatures and irradiation and its service life is shortened. It is crucial to improve the insulating and electrical properties of irradiated polyethylene. In this study, low-density polyethylene (LDPE) based Boron Nitride (mathrm {B}mathrm {N})/mathrm {S}mathrm {i}mathrm {O}-{2} Micro/nanocomposites have been prepared to investigate the effect gamma-ray irradiation on the trap characteristics. The irradiation was carried out in air and the total dose was 0mathrm {k}mathrm {G}mathrm {y}, 100mathrm {k}mathrm {G}mathrm {y}, 500mathrm {k}mathrm {G}mathrm {y} and 1000~mathrm {k}mathrm {G}mathrm {y}. The surface potential decay of gamma-irradiated composites filled with various contents of micro- and nano-sized particles was measured, and the trap distribution and the carrier mobility of composites could be obtained. It was found that the trap depth decreased as the total dose increased from 0 mathrm {k}mathrm {G}mathrm {y} to 1000~mathrm {k}mathrm {G}mathrm {y}. The trap depth of the composites containing 20 wt% micro-BN and 5 wt% nano-SiO2 did not change significantly with the growth of irradiation dose. It is considered that the addition of micro- and nano- particles plays a better role in hindering the chemical reactions such as crosslinking and oxidation.

Gamma-ray irradiation, Micro/nanocomposites, Polyethylene, Trap characteristics
IEE
Wang, X.F.
9c97f900-36e0-4874-bdeb-82d5e2775136
Gao, Y.
eea234ba-f566-4f21-a65e-234b84cba285
Li, N.
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Xu, B.B.
0dbc6d06-8855-489e-8b0a-7aea092b1705
Wang, J.L.
5441624e-4585-4779-8ee2-9c9533451173
Du, B.X.
af9ea7a2-7ceb-4de1-b17b-61c7b5590309
Pan, C.
78b61579-72a3-4bfd-a632-45f0d97e83f2
Wang, X.F.
9c97f900-36e0-4874-bdeb-82d5e2775136
Gao, Y.
eea234ba-f566-4f21-a65e-234b84cba285
Li, N.
f3f8b4ff-900b-4f1f-b6dc-ac4d884ba1bb
Xu, B.B.
0dbc6d06-8855-489e-8b0a-7aea092b1705
Wang, J.L.
5441624e-4585-4779-8ee2-9c9533451173
Du, B.X.
af9ea7a2-7ceb-4de1-b17b-61c7b5590309
Pan, C.
78b61579-72a3-4bfd-a632-45f0d97e83f2

Wang, X.F., Gao, Y., Li, N., Xu, B.B., Wang, J.L., Du, B.X. and Pan, C. (2018) Effect of gamma-ray irradiation on trap characteristics of polyethylene based micro/nanocomposites. In 2018 IEEE 2nd International Conference on Dielectrics, ICD 2018. IEE. 4 pp. (doi:10.1109/ICD.2018.8468461).

Record type: Conference or Workshop Item (Paper)

Abstract

As the main insulating material of nuclear power plant cables, polyethylene is exposed to high temperatures and irradiation and its service life is shortened. It is crucial to improve the insulating and electrical properties of irradiated polyethylene. In this study, low-density polyethylene (LDPE) based Boron Nitride (mathrm {B}mathrm {N})/mathrm {S}mathrm {i}mathrm {O}-{2} Micro/nanocomposites have been prepared to investigate the effect gamma-ray irradiation on the trap characteristics. The irradiation was carried out in air and the total dose was 0mathrm {k}mathrm {G}mathrm {y}, 100mathrm {k}mathrm {G}mathrm {y}, 500mathrm {k}mathrm {G}mathrm {y} and 1000~mathrm {k}mathrm {G}mathrm {y}. The surface potential decay of gamma-irradiated composites filled with various contents of micro- and nano-sized particles was measured, and the trap distribution and the carrier mobility of composites could be obtained. It was found that the trap depth decreased as the total dose increased from 0 mathrm {k}mathrm {G}mathrm {y} to 1000~mathrm {k}mathrm {G}mathrm {y}. The trap depth of the composites containing 20 wt% micro-BN and 5 wt% nano-SiO2 did not change significantly with the growth of irradiation dose. It is considered that the addition of micro- and nano- particles plays a better role in hindering the chemical reactions such as crosslinking and oxidation.

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More information

Published date: 1 November 2018
Venue - Dates: 2nd International Conference on Dielectrics: 2ND IEEE INTERNATIONAL CONFERENCE ON DIELECTRICS, Budapest, Hungary, 2018-07-01 - 2018-07-05
Keywords: Gamma-ray irradiation, Micro/nanocomposites, Polyethylene, Trap characteristics

Identifiers

Local EPrints ID: 426535
URI: https://eprints.soton.ac.uk/id/eprint/426535
PURE UUID: 11e89c89-a99f-49c1-8877-8632c70ce1ea

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Date deposited: 30 Nov 2018 17:30
Last modified: 04 Dec 2018 17:30

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Contributors

Author: X.F. Wang
Author: Y. Gao
Author: N. Li
Author: B.B. Xu
Author: J.L. Wang
Author: B.X. Du
Author: C. Pan

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