Study on Nonlinear Characteristics on Conductivity of Silicon Carbide Whisker/Epoxy Resin Composites
Chi Qingguo1,2, Cui Shuang1,2, Zhang Tiandong1,2, Yang Meng1,2, Chen Qingguo1,2
1. Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin 150080 China; 2. School of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin 150080 China
Abstract：The application of nonlinear electric field grading insulation composites can effectively alleviate the concentrated electric field at the key positions of high voltage electrical equipment. However, the composites with excellent nonlinear characteristics on conductivity often need to be doped with a large amount of inorganic fillers, which can easily induce the agglomeration of fillers and poor compatibility with the matrix. It has severely limited the application of the composites in the high voltage electrical equipment. Therefore, silicon carbide whiskers (SiCw) were selected to improve the nonlinear conductivity characteristics of epoxy resin (EP), and the coupling reagent (KH550) was used to modify SiCw and further optimize the insulation performance of the composite by improving the compatibility of the filler with matrix. The results show that, compared with the composite doped with unmodified SiCw, the SiCw fillers modified by 1% KH550 distribute more uniformly in the matrix and exhibit better compatibility with epoxy resin. At the same time, the composites doped with 1% KH550 modified SiCw have achieved remarkable nonlinear conductivity at lower doping content, and the decreased breakdown strength, especially at higher doping content, has been restrained obviously.
迟庆国, 崔爽, 张天栋, 杨蒙, 陈庆国. 碳化硅晶须/环氧树脂复合介质非线性电导特性研究[J]. 电工技术学报, 2020, 35(20): 4405-4414.
Chi Qingguo, Cui Shuang, Zhang Tiandong, Yang Meng, Chen Qingguo. Study on Nonlinear Characteristics on Conductivity of Silicon Carbide Whisker/Epoxy Resin Composites. Transactions of China Electrotechnical Society, 2020, 35(20): 4405-4414.
[1] 何金良, 杨霄, 胡军. 非线性均压材料的设计理论与参数调控[J]. 电工技术学报, 2017, 32(16): 44-60. He Jinliang, Yang Xiao, Hu Jun.Progress of theory and parameter adjustment for nonlinear resistive field grading materials[J]. Transactions of China Electro- technical Society, 2017, 32(16): 44-60. [2] 律方成, 詹振宇, 张立国, 等. 等离子体氟化改性微米AlN填料对环氧树脂绝缘性能的影响[J]. 电工技术学报, 2019, 34(16): 3522-3531. Lü Fangcheng, Zhan Zhenyu, Zhang Liguo, et al.Effect of plasma fluorinated modified micro-AlN filler epoxy resin on the insulation properties[J]. Transactions of China Electrotechnical Society, 2019, 34(16): 3522-3531. [3] 田汇冬, 李乃一, 吴泽华, 等. 直流GIL柱式绝缘子表面电荷积聚特性[J]. 电工技术学报, 2018, 33(22): 5178-5188. Tian Huidong, Li Naiyi, Wu Zehua, et al.Accumu- lation characteristics of surface charge for post insulators of DC enclosed transmission line[J]. Transactions of China Electrotechnical Society, 2018, 33(22): 5178-5188. [4] 唐炬, 潘成, 王邸博, 等. 高压直流绝缘材料表面电荷积聚研究进展[J]. 电工技术学报, 2017, 32(8): 10-21. Tang Ju, Pan Cheng, Wang Dibo, et al.Development of studies about surface charge accumulation on insulating material under HVDC[J]. Transactions of China Electrotechnical Society, 2017, 32(8): 10-21. [5] 牛万宇. ±1100kV直流SF6穿墙套管伞裙结构设计[J]. 电气技术, 2019, 20(7): 18-22, 51. Niu Wanyu.Structure design of ±1100kV DC SF6 wall bushing umbrella skirt[J]. Electrical Engineering, 2019, 20(7): 18-22, 51. [6] Chi Qingguo, Yang Meng, Zhang Changhai, et al.Nonlinear electrical conductivity and thermal properties of AgNPs/BN/EPDM composites for cable accessory[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2019, 26(4): 1081-1088. [7] Chi Qingguo, Li Zhen, Zhang Tiandong, et al.Study on nonlinear conductivity of copper-titanate-calcium/ liquid silicone rubber composites[J]. IEEE Transa- ctions on Dielectrics and Electrical Insulation, 2019, 26(3): 681-688. [8] Wang Jian, Yu Shuhui, Luo Suibin, et al.Investigation of nonlinear I-V behavior of CNTs filled polymer composites[J]. Materials Science & Engineering B, 2016, 206: 55-60. [9] Christen Thomas, Donzel Lise, Greuter Felix.Nonlinear resistive electric field grading part 1: theory and simulation[J]. IEEE Electrical Insulation Magazine, 2010, 26(6): 47-59. [10] 李昂, 张苗苗. 环氧树脂非线性电导复合材料表面电荷与沿面闪络特性研究[J]. 绝缘材料, 2018, 51(6): 26-31. Li Ang, Zhang Miaomiao.Surface charge and flashover characteristics of epoxy resin non-linear conductive composites[J]. Insulating Materials, 2018, 51(6): 26-31. [11] Wang Feifeng, Zhang Peihong, Gao Mingze.Improvement in the electric field distribution of silicone rubber composite insulators by non-linear fillers[C]//2013 8th International Forum on Strategic Technology (IFOST), Ulaanbaatar, 2013: 217-221. [12] Wang Xilin, Guo Juyi, Yao Youwei, et al.Study of epoxy resin composites doped with nonlinear fillers and its electrical properties[C]//2017 IEEE Con- ference on Electrical Insulation and Dielectric Pheno- menon (Ceidp), Fort Worth, 2017: 54-57. [13] 许静, 雷西萍, 韩丁, 等. 硅烷偶联剂改性SiC晶须/ PVDF复合薄膜的制备及其介电性能研究[J]. 硅酸盐通报, 2018, 37(9): 3028-3035. Xu Jing, Lei Xiping, Han Ding, et al.Preparation and dielectric properties of silane coupling agent modified SiC whisker/PVDF composite membrane[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(9): 3028-3035. [14] 张博, 乌江, 郑晓泉. 改性聚酰亚胺表面稳定性与真空直流沿面闪络抑制方法研究[J]. 电工技术学报, 2019, 34(13): 2846-2853. Zhang Bo, Wu Jiang, Zheng Xiaoquan.Study of the surface stability of modified polyimide and the suppression method of surface flashover under DC voltage in vacuum[J]. Transactions of China Electro- technical Society, 2019, 34(13): 2846-2853. [15] 韩宝忠, 郭文敏, 李忠华. 碳化硅/硅橡胶复合材料的非线性电导特性[J]. 功能材料, 2008, 39(9): 1490-1493. Han Baozhong, Guo Wenmin, Li Zhonghua.Nonlinear conductivity properties of silicon carbide/ silicone rubber composites[J]. Journal of Functional Materials, 2008, 39(9): 1490-1493. [16] 兰莉, 吴建东, 纪哲强, 等. 纳米SiO2/低密度聚乙烯复合介质的击穿特性[J]. 中国电机工程学报, 2012, 32(13): 138-143. Lan Li, Wu Jiandong, Ji Zheqiang, et al.Breakdown properties of nano-SiO2/LDPE composite[J]. Pro- ceedings of the CSEE, 2012, 32(13): 138-143. [17] Chi Qingguo, Hao Yuyi, Zhang Tiandong, et al.Study on nonlinear conductivity and breakdown characteristics of zinc oxide-hexagonal boron nitride/EPDM composites[J]. Journal of Materials Science: Materials in Electronics, 2018, 29(23): 19678-19688. [18] Zhang Yuefei, Han Xiaodong, Zheng Kun, et al.Direct observation of super-plasticity of beta-SiC nanowires at low temperature[J]. Advanced Fun- ctional Materials, 2007, 17(17): 3435-3440. [19] Zhang Xin, Shen Yang, Shen Zhonghui, et al.Achieving high energy density in PVDF-based polymer blends: suppression of early polarization saturation and enhancement of breakdown strength[J]. ACS Applied Materials & Interfaces, 2016, 8(40): 27236-27242. [20] 程羽佳, 郭宁, 王若石, 等. 纳米ZnO和纳米MMT对低密度聚乙烯介电性能的影响[J]. 复合材料学报, 2015, 32(1): 94-100. Cheng Yujia, Guo Ning, Wang Ruoshi, et al.Effect of nano-ZnO and nano-MMT on dielectric properties of low density polyethylene[J]. Acta Materiae Com- positae Sinica, 2015, 32(1): 94-100. [21] 王旗, 李喆, 尹毅. 微、纳米无机颗粒/环氧树脂复合材料击穿强度性能[J]. 电工技术学报, 2014, 29(12): 230-235. Wang Qi, Li Zhe, Yin Yi.The effect of micro and nano inorganic filler on the breakdown strength of epoxy resin[J]. Transactions of China Electro- technical Society, 2014, 29(12): 230-235. [22] Du Boxue, Yang Zhuoran, Li Zhonglei, et al.Temperature-dependent nonlinear conductivity and carrier mobility of silicone rubber/SiC composites[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2018, 25(3): 1080-1087. [23] 杨国清, 黎洋, 王德意, 等. 超支化聚酯改性纳米SiO2/环氧树脂的介电特性[J]. 电工技术学报, 2019, 34(5): 1106-1115. Yang Guoqing, Li Yang, Wang Deyi, et al.Effect of hyperbranched polyester grafting nanosilica on dielectric properties of epoxy resin[J]. Transactions of China Electrotechnical Society, 2019, 34(5): 1106-1115.
2020, Vol. 35 
