伽玛线辐射对环氧树脂表面陷阱分布的影响

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Abstract Epoxy resin used as insulating material in radioactive environment is subjected to a great risk of surface discharge which may finally lead to damage of the material and cause catastrophic failure to the electrical equipment. Surface trap distribution plays a key role in determining the propagation process of surface discharge, and from the viewpoint of safety, it is essential to gain a firm understanding of radiation effect on surface trap distribution. In this paper, the effect of gamma-ray irradiation on surface trap characteristics of epoxy resin was examined by means of isothermal surface potential decay measurement. The sample was previously irradiated in air up to 100kGy and then up to 1 000kGy with dosage rate of 10kGy/h by using a ⁶⁰Co gamma-source. Surface potential was established with dc corona charging through needle-grid-plate electrode system. The potential was monitored with an electrostatic voltmeter, by which surface trap density as well as surface trap depth could be calculated. Obtained results show that with the increase of the total irradiation dose the trap density decreases initially then tends to increase, while the trap depth appears to decrease. It is proposed that surface trap distribution is dependent upon chemical structure of surface layer, which is varied by radiation induced cross-linking and degradation reactions in epoxy resin.

Key words： Epoxy resin surface trap distribution gamma-ray irradiation isothermal decay current

Received: 09 November 2011 Published: 20 March 2014

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TM852

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	Articles by authors
	Gao Yu
	Li Ying
	Cui Jinda
	Du Boxue

Cite this article:

Gao Yu,Li Ying,Cui Jinda等. Effect of Gamma-Ray Irradiation on Surface Trap Distribution of Epoxy Resin[J]. Transactions of China Electrotechnical Society, 2012, 27(12): 264-269.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I12/264

[1] Kurihara T, Takahashi T, Homma H, et al. Oxidation of cross-linked polyethylene due to radiation- thermal deterioration[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2011, 18(3): 878-887.
[2] Robinson Jr R A, Coakley P. Spacecraft charging progress in the study of dielectrics and plasmas [J]. IEEE Transactions on Electrical Insulation, 1992, 19(2): 944-960.
[3] Banford H M, Fouracre R A. Nuclear technology and ageing[J]. IEEE Electrical Insulation Magazine, 1999, 15(5): 19-27.
[4] Johnson R T, Thome Jr F V, Craft C M. A survey of aging of electronics with application to nuclear power plant instrumentation[J]. IEEE Transactions on Nuclear Science, 1983, 30(6): 4358-4362.
[5] Kyoto M, Chigusa Y, Ohe M, et al. Gamma-ray radiation hardened properties of pure silica core single-mode fiber and its data link system in radioactive environments[J]. Journal of Lightwave Technology, 1992, 10(3): 289-294.
[6] Laghari J R, Hammoud A N. A brief survey of radiation effects on polymer dielectrics[J]. IEEE Transactions on Nuclear Science, 1990, 37(2): 1076-1083.
[7] Chen G, Davies A E, Banford H M. Influence of radiation environments on space charge formation in γ-irradiated LDPE[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1999, 6(6): 882-886.
[8] Farish O, Al-Bawy I. Effect of surface charge on impulse flashover of insulator in SF₆[J]. IEEE Transactions on Electrical Insulation, 1991, 1(2): 443- 452.
[9] Li C R, Ding L J, Lv J Z, et al. The relation of trap distribution of alumina with surface flashover performance in vacuum[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2006, 13(1): 79-84.
[10] Nho Y C, Kang P H, Park J S. The characteristics of epoxy resin cured by g-ray and e-beam[J]. Radiation Physics and Chemistry, 2003, 71(1-2): 241-244.
[11] Humer H, Weber H W, Tschegg E K. Radiation effects on insulators for superconducting fusion magnets[J]. Cryogenics, 1995, 35(12): 871-882.
[12] De Lorenzi A, Grando L, Pesce A, et al. Modeling of epoxy resin spacers for the 1MV DC gas insulated line of ITER neutral beam injector system[J]. IEEE Transactions on Electrical Insulation, 2009, 16(1): 77-87.
[13] Simmons J G, Tam M C. Theory of isothermal currents and the direct determination of trap parameters in semiconductors and insulators containing arbitrary trap distributions[J]. Physical Review B, 1972, 7(8):3706-3713.
[14] 杜伯学, 高宇, 刘彦君. 聚萘二甲酸丁二醇酯试样表面电荷迁移与消散机理[J]. 电工技术学报, 2009, 24(3): 36-40, 54.
Du Boxue, Gao Yu, Liu Yanjun. Charge migration and decay on polybutylene naphthalate surface [J]. Transactions of China Electrotechnical Society, 2009, 24(3):36-40, 54.
[15] Das-Gupta D K. Decay of electrical charges on organic synthetic polymer surfaces[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1990, 25(3): 503-508.
[16] Ono R, Nakazawa M, Oda T. Charge storage in corona-charged polypropylene films analyzed by LIPP and TSC methods[J]. IEEE Transactions on Industry Applications, 2004, 40(6): 1482-1488.
[17] Chen G, Xu Z. Charge trapping and detrapping in polymeric materials [J]. Journal of Applied Physics, 2009, 106(12): 123707-123707-5.
[18] 杜伯学, 高宇, 马宗乐.伽玛线辐射对聚乙烯表面电荷累积的影响[J]. 电工技术学报, 2009, 24(6): 1-4, 11.
Du Boxue, Gao Yu, Ma Zongle. Effects of gamma-ray irradiation on surface charge accumulation of polyethylene[J]. Transactions of China Electrote- chnical Society, 2009, 24(6):1-4, 11.
[19] Teyssedre G, Laurent C. Charge transport modeling in insulating polymers: from molecular to macroscopic scale[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2005, 12(5): 857-875.