掺杂含量对环氧纳米复合电介质陷阱与空间电荷的影响

袁端磊; 闵道敏; 黄印; 谢东日; 王海燕; 杨芳; 朱志豪; 费翔; 李盛涛

doi:10.7498/aps.66.097701

摘要

环氧纳米复合电介质具有抑制空间电荷积聚、高电阻率、高击穿强度等优异性能，对直流电力设备的发展具有重要的作用.但纳米粒子含量对纳米复合电介质陷阱、电导率和空间电荷的影响机理尚不清楚.本文在纳米复合电介质交互区结构模型的基础上提出了计算交互区浅陷阱和深陷阱密度的方法，得到了浅陷阱和深陷阱密度随纳米粒子含量的变化关系.随着纳米粒子含量的增加，浅陷阱密度逐渐增大，深陷阱先增加然后由于交互区重叠的影响而逐渐减少.研究了纳米粒子含量对浅陷阱控制载流子迁移率的影响，发现随着纳米粒子的增多，浅陷阱大幅增多，浅陷阱之间的平均间距迅速减小，导致载流子更容易在浅陷阱间跳跃迁移，浅陷阱控制载流子迁移率增大.建立了纳米复合电介质的电荷输运模型，采用电荷输运模型计算研究了环氧/二氧化钛纳米复合电介质的空间电荷分布、电场分布和电导率特性.发现在纳米粒子添加量较小时，交互区的深陷阱对电导的影响起主导作用；纳米粒子添加量进一步增加，浅陷阱对电导的影响将起到主要作用.

关键词:

Abstract

Epoxy resin nanocomposites have excellent properties such as the suppression of space charge accumulation, high resistivity, and high electrical breakdown strength, which play an important role in developing the direct current power equipment. However, the influencing mechanisms of filler content on trap, conductivity, and space charge of nanocomposites have not been clear to date. In the present paper, a method to calculate the densities of shallow traps and deep traps in interaction zones is proposed based on the multi-region structure model of interaction zones, and the dependence of shallow traps and deep traps on filler content is obtained. It is found that the shallow trap density increases with the increase of filler content, while the deep trap density first increases and then decreases with increasing the filler content, which is caused by the overlap of interaction zones. Then, the relation between the shallow trap controlled carrier mobility and the filler content is investigated. With the filler content increasing, the density of shallow traps increases and their mean distance decreases, leading to an increase in the shallow trap controlled carrier mobility. Considering the charge injection from cathode into dielectrics, carrier hopping in shallow traps, charge trapping into and detrapping from deep traps, a unipolar charge transport model is established to study the conductivity and distributions of space charges and electric field in epoxy resin nanocomposites. At relatively low filler content, the charge transport is dominated by deep traps in interaction zones and the conductivity decreases with the increase of filler content. However, the charge transport is determined by shallow traps at relatively high filler content and the conductivity increases.

Keywords:

作者及机构信息

1.
平高集团有限公司, 平顶山 467001;

2.
西安交通大学, 电力设备电气绝缘国家重点实验室, 西安 710049

通信作者: 闵道敏, forrestmin@xjtu.edu.cn

基金项目: 国家重点基础研究发展计划（批准号：2015CB251003）、国家自然科学基金（批准号：51507124）、清华大学电力系统国家重点实验室开放课题（批准号：SKLD16KZ04）、中国博士后科学基金（批准号：2014M552449）、中央高校基本科研业务费（批准号：xjj2014022）和西安交通大学新教师支持计划（批准号：DWSQc130000008）资助的课题.

Authors and contacts

1.
Pinggao Group Co. LTD., Pingdingshan 467001, China;

2.
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China

Corresponding author: Min Dao-Min, forrestmin@xjtu.edu.cn

Funds: Project supported by the National Basic Research Program of China (Grant No. 2015CB251003), the National Natural Science Foundation of China (Grant No. 51507124), the Open Fund Project of State Key Laboratory of Power System of Tsinghua University, China (Grant No. SKLD16KZ04), the China Postdoctoral Science Foundation (Grant No. 2014M552449), the Fundamental Research Fund for the Central Universities, China (Grant No. xjj2014022), and the Program for New Teacher of Xi'an Jiaotong University, China (Grant No. DWSQc130000008).

参考文献

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[15]	Li S T, Min D M, Wang W W, Chen G 2016 IEEE Trans. Dielectr. Electr. Insul. 23 3476
[16]	Henk P O, Kortsen T W, Kvarts T 1999 High Perform. Polym. 11 281
[17]	Dang Z M, Yuan J K, Yao S H, Liao R J 2013 Adv. Mater. 25 6334
[18]	Li S T, Min D M, Wang W W, Chen G 2016 IEEE Trans. Dielectr. Electr. Insul. 23 2777
[19]	Ieda M 1984 IEEE Trans. Electr. Insul. 19 162
[20]	Teyssdre G, Laurent C 2005 IEEE Trans. Dielectr. Electr. Insul. 12 857
[21]	Mott N F, Davis E A 1979 Electronic Processes in Non-crystalline Meterials (Oxford: Clarendon Press) p60
[22]	Min D M, Wang W W, Li S T 2015 IEEE Trans. Dielectr. Electr. Insul. 22 1483
[23]	Dissado L A, Fothergill J C 1992 Electrical Degradation and Breakdown in Polymers (London: Peter Peregrinus Ltd) p214
[24]	Li X T, Masuzaki Y, Tian F Q, Ohki Y 2015 IEEJ Trans. Fundament. Mater. 135 88
[25]	Min D M, Li S T, Ohki Y 2016 IEEE Trans. Dielectr. Electr. Insul. 23 507
[26]	Laurent C, Teyssedre G, Le Roy S, Baudoin F 2013 IEEE Trans. Dielectr. Electr. Insul. 20 357
[27]	Chen G, Zhao J, Li S, Zhong L 2012 Appl. Phys. Lett. 100 222904
[28]	Dissado L A, Griseri V, Peasgood W, Cooper E S, Fukunaga K, Fothergill J C 2006 IEEE Trans. Dielectr. Electr. Insul. 13 903
[29]	Nelson J K, Fothergill J C 2004 Nanotechnology 15 586
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施引文献

[1]	Nelson J K 2010 Dielectric Polymer Nanocomposites (New York: Springer) pp1-27
[2]	Li S, Yin G, Chen G, Li J, Bai S, Zhong L, Zhang Y, Lei Q Q 2010 IEEE Trans. Dielectr. Electr. Insul. 17 1523
[3]	Tanaka T 2005 IEEE Trans. Dielectr. Electr. Insul. 12 914
[4]	Tanaka T, Kozako M, Fuse N, Ohki Y 2005 IEEE Trans. Dielectr. Electr. Insul. 12 669
[5]	Huang X Y, Zhi C Y 2016 Polymer Nanocomposites: Electrical and Thermal Properties (Switzerland: Springer) pp3-77
[6]	Luo Y, Wu G N, Peng J, Zhang Y Q, Xu H H, Wang P 2012 High Voltage Eng. 38 2455 (in Chinese) [罗杨, 吴广宁, 彭佳, 张依强, 徐慧慧, 王鹏 2012 高电压技术 38 2455]
[7]	Zhang L, Zhou Y X, Zhang Y X, Wang Y S, Guo D W, Chen Z Z 2014 High Voltage Eng. 40 2653 (in Chinese) [张灵, 周远翔, 张云霄, 王云杉, 郭大卫, 陈铮铮 2014 高电压技术 40 2653]
[8]	Wu J D, Yin Y, Lan L, Wang Q H, Li X G, Xiao D M 2012 Proc. CSEE 32 177 (in Chinese) [吴建东, 尹毅, 兰莉, 王俏华, 李旭光, 肖登明 2012 中国电机工程学报 32 177]
[9]	Zha J W, Wu Y H, Wang S J, Wu D H, Yan H D, Dang Z M 2016 IEEE Trans. Dielectr. Electr. Insul. 23 2337
[10]	Li S, Yin G, Bai S, Li J 2011 IEEE Trans. Dielectr. Electr. Insul. 18 1535
[11]	Murakami Y, Nemoto M, Okuzumi S, Masuda S, Nagao M, Hozumi N, Sekiguchi Y, Murata Y 2008 IEEE Trans. Dielectr. Electr. Insul. 15 33
[12]	Cao Y, Irwin P C, Younsi K 2004 IEEE Trans. Dielectr. Electr. Insul. 11 797
[13]	Lewis T J 2005 J. Phys. D: Appl. Phys. 38 202
[14]	Lewis T J 2004 IEEE Trans. Dielectr. Electr. Insul. 11 739
[15]	Li S T, Min D M, Wang W W, Chen G 2016 IEEE Trans. Dielectr. Electr. Insul. 23 3476
[16]	Henk P O, Kortsen T W, Kvarts T 1999 High Perform. Polym. 11 281
[17]	Dang Z M, Yuan J K, Yao S H, Liao R J 2013 Adv. Mater. 25 6334
[18]	Li S T, Min D M, Wang W W, Chen G 2016 IEEE Trans. Dielectr. Electr. Insul. 23 2777
[19]	Ieda M 1984 IEEE Trans. Electr. Insul. 19 162
[20]	Teyssdre G, Laurent C 2005 IEEE Trans. Dielectr. Electr. Insul. 12 857
[21]	Mott N F, Davis E A 1979 Electronic Processes in Non-crystalline Meterials (Oxford: Clarendon Press) p60
[22]	Min D M, Wang W W, Li S T 2015 IEEE Trans. Dielectr. Electr. Insul. 22 1483
[23]	Dissado L A, Fothergill J C 1992 Electrical Degradation and Breakdown in Polymers (London: Peter Peregrinus Ltd) p214
[24]	Li X T, Masuzaki Y, Tian F Q, Ohki Y 2015 IEEJ Trans. Fundament. Mater. 135 88
[25]	Min D M, Li S T, Ohki Y 2016 IEEE Trans. Dielectr. Electr. Insul. 23 507
[26]	Laurent C, Teyssedre G, Le Roy S, Baudoin F 2013 IEEE Trans. Dielectr. Electr. Insul. 20 357
[27]	Chen G, Zhao J, Li S, Zhong L 2012 Appl. Phys. Lett. 100 222904
[28]	Dissado L A, Griseri V, Peasgood W, Cooper E S, Fukunaga K, Fothergill J C 2006 IEEE Trans. Dielectr. Electr. Insul. 13 903
[29]	Nelson J K, Fothergill J C 2004 Nanotechnology 15 586
[30]	Hajiyiannis A, Chen G, Zhang C, Stevens G 2008 Annual Report Conference on Electrical Insulation Dielectric Phenomena Quebec, Canada, October 26-29, 2008 p714
[31]	Takada T, Hayase Y, Tanaka Y, Okamoto T 2008 IEEE Trans. Dielectr. Electr. Insul. 15 152

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