纳米AlN改性对干式变压器环氧树脂绝缘性能的影响

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摘要聚合物纳米复合材料因其优良的电气绝缘性能在电介质绝缘领域得到了广泛应用。为了获得性能优良的环氧树脂绝缘材料,将采用硅烷偶联剂进行表面处理后的纳米AlN颗粒加入环氧树脂绝缘材料中,采用溶液共混法制备了AlN质量分数分别为0%、0.5%、1%、3%、5%、7%的AlN/环氧树脂复合材料,研究了不同AlN质量分数对AlN/环氧树脂复合材料绝缘性能的影响。结果表明,树脂基体和AlN填料之间实现了有效的结合,提高了环氧树脂的热稳定性;AlN的加入一定程度上减小了复合材料的体积电阻率,并且增大了复合材料的介质损耗因数,但对复合材料电气绝缘性能的影响较小;当纳米AlN颗粒质量分数为3%时,AlN/环氧树脂复合材料的交流击穿电场强度最大。因此,添加适量纳米AlN颗粒能够提高干式变压器环氧树脂的电气绝缘性能。

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	王有元
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	黄炎光
	易鹭

关键词 ：纳米AlN, 环氧树脂, 体积电阻率, 介质损耗因数, 交流击穿电场强度

Abstract：Nanocomposite has been applied widely in dielectrics and electrical insulations due to its extraordinary electrical insulation properties. In order to get a better performance of epoxy resin insulation material, the nano aluminum nitride (AlN) which has been surface-treated by silane coupling agent is mixed in epoxy resin, AlN/epoxy composites with mass content 0%, 0.5%, 1%, 3%, 5%,7% of AlN are prepared by solution blending, and insulation properties of AlN/epoxy composites are researched. The results show that the effective integration between the resin matrix and AlN filler improves the thermal stability of the epoxy resin. The AlN particles reduce the volume resistivity and increase the dielectric loss factor of composites, but have little effect on the electrical insulation properties.When with 3% of nano particle, the breakdown strength of AlN/epoxy composites increases significantly. Therefore, it can improve the electrical insulation properties of epoxy resin dry-type transformers by mixing in appropriate nano-AlN particles.

Key words： Nano-AlN epoxy resin volume resistivity dielectric loss factor AC breakdown field strength

收稿日期: 2016-01-06 出版日期: 2017-04-17

PACS:

TM215.1

基金资助:国家创新研究群体基金(51321063)和广州供电局科技项目(K-GZM2014-028)资助。

通讯作者: 王施又男,1990年生,硕士,研究方向为变压器绝缘在线监测与故障诊断。E-mail:wangshiyou2007@126.com

作者简介: 王有元男,1971年生,教授,博士生导师,研究方向为电气设备绝缘在线监测及故障诊断。E-mail:y.wang@cqu.edu.cn

引用本文:

王有元,王施又,陆国俊,黄炎光,易鹭. 纳米AlN改性对干式变压器环氧树脂绝缘性能的影响[J]. 电工技术学报, 2017, 32(7): 174-180. Wang Youyuan,Wang Shiyou,Lu Guojun,Huang Yanguang,Yi Lu. Influence of Nano-AlN Modification on the Insulation Properties of Epoxy Resin of Dry-Type Transformers. Transactions of China Electrotechnical Society, 2017, 32(7): 174-180.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I7/174

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