电工技术学报  2019, Vol. 34 Issue (16): 3522-3532    DOI: 10.19595/j.cnki.1000-6753.tces.181727
放电等离子体及应用 |
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
律方成1,2, 詹振宇1,2, 张立国1, 焦羽丰2, 谢庆1,2
1. 华北电力大学新能源电力系统国家重点实验室 北京 102206;
2. 华北电力大学河北省输变电设备安全防御重点实验室 保定 071003
Effect of Plasma Fluorinated Modified Micro-AlN Filler Epoxy Resin on the Insulation Properties
Lü Fangcheng1,2, Zhan Zhenyu1,2, Zhang Liguo1, Jiao Yufeng2, Xie Qing1,2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China;
2. Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power University Baoding 071003 China
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摘要 环氧树脂常用于制造盆式绝缘子,其在直流电压下的表面电荷积聚现象严重,成为阻碍直流气体绝缘电气设备研发与应用的主要瓶颈。等离子体技术作为一种高效、可控的改性方法,可以有效改善环氧填料的电气性能。本文采用大气压低温等离子体技术对微米AlN填料进行氟化处理,控制不同的氟化时间,测试改性后的环氧树脂试样的微观形貌、化学组分、电荷特性及沿面闪络特性。实验结果表明:等离子体氟化45min后,填料平均粒径降低26%,填料氟化45min,氟元素占比达到38.55%。随着氟化时间增加,环氧树脂样初始积聚电荷量降低,闪络电压呈现先增加后降低的规律,在对填料氟化45min时,闪络电压提升最明显,较未氟化填料提升了约39.9%,两参数韦布尔分布表明闪络电压分散性也有所降低。研究结果表明了等离子体填料处理提升环氧树脂电气性能的可行性,处理方法高效稳定,性能提升明显,为AlN及其他填料的改性提供了新的研究思路。
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关键词 低温等离子体氟化微米氮化铝沿面闪络特性    
Abstract:Epoxy resin is commonly used in the manufacture of basin insulators, and its surface charge accumulation under DC voltage is a serious phenomenon, which has become a major bottleneck hindering the development and application of DC gas insulated electrical equipment. As a highly efficient and controllable modification method, plasma technology can effectively improve the electrical properties of epoxy fillers. In this paper, the micron-AlN filler was fluorinated by cold plasma technology at atmospheric pressure and different fluorination time was controlled. The morphology, chemical composition, charge characteristics and creeping flashover characteristics of the modified epoxy resin samples were tested. The experimental results show that after plasma fluorination for 45 min, the average particle size of the filler is reduced by 26%, the filler is fluorinated for 45 min, and the proportion of fluorine is 38.55%. As the fluorination time increases, the amount of initial charge accumulated in the epoxy resin decreases, and the flashover voltage first increases and then decreases. When the filler is fluorinated for 45 minutes, the flashover voltage is the most obvious, which is about 39.9% higher than that of the unfluorinated filler; and the two-parameter Weibull distribution indicates that the flashover voltage dispersion also decreases. The results show that the plasma filler treatment can improve the electrical properties of epoxy resin. The treatment method is efficient and stable, and the performance is improved obviously. It provides a new research idea for the modification of AlN and other fillers.
Key wordsCold plasma technology at atmospheric pressure    fluorination    micro-AlN    flashover characteristic   
收稿日期: 2018-11-08      出版日期: 2019-09-02
PACS: TM85  
基金资助:国家自然科学基金(51777076)和中央高校基本科研业务费青年培养项目(2018QN002)资助
通讯作者: 谢 庆 男,1979年生,博士(后),教授,博导,研究方向为电气设备在线监测与故障诊断、电工新材料。E-mail: xq_ncepu @126.com   
作者简介: 律方成 男,1963年生,博士,教授,博导,研究方向为电气设备在线监测与故障诊断、电工新材料。E-mail: lfc@ncepu.edu.cn
引用本文:   
律方成, 詹振宇, 张立国, 焦羽丰, 谢庆. 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): 3522-3532. Lü Fangcheng, Zhan Zhenyu, Zhang Liguo, Jiao Yufeng, Xie Qing. Effect of Plasma Fluorinated Modified Micro-AlN Filler Epoxy Resin on the Insulation Properties. Transactions of China Electrotechnical Society, 2019, 34(16): 3522-3532.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.181727          https://dgjsxb.ces-transaction.com/CN/Y2019/V34/I16/3522