不均匀电场下纳米氧化锌改性环氧树脂的绝缘特性

发布时间：2018-04-30 20:18

本文选题：纳米氧化锌 + 环氧树脂　；参考：《高电压技术》2017年09期

【摘要】：为研究纳米ZnO掺杂对环氧树脂复合材料绝缘特性的影响,以纳米ZnO改性双酚A型环氧树脂材料为研究对象,考察了不同掺杂量下复合材料直流电导、介电常数等绝缘特征参数的变化趋势;并利用针板电极系统,分别对ZnO/环氧和SiO_2/环氧复合材料进行了起始局放电压对比测试。研究发现,当纳米ZnO质量分数15%时,复合材料开始呈现非线性电导特性,复合材料介电常数也发生显著变化,质量分数为30%时其电导非线性系数可达到18.7,介电常数则可上升至5.9。相同电极结构下,纳米ZnO/环氧复合材料的起始局放电压显著高于SiO_2/环氧复合材料,ZnO质量分数为15%时起始局放起始电压达到最大值,分别比无掺杂树脂及纳米SiO_2掺杂树脂提高了33%和22%。研究表明,纳米ZnO粒子的引入显著提高了环氧树脂复合材料的绝缘性能,纳米ZnO粒子的界面效应和非线性电导特性在改善复合树脂绝缘特性方面发挥了主要作用。
[Abstract]:In order to study the effect of nano ZnO doping on the insulating properties of epoxy resin composites, the direct current conductance of composites with different doping amounts was investigated by using nano ZnO modified bisphenol A epoxy resin as the research object. The variation trend of dielectric constant and other insulation characteristic parameters, and the comparison of initial partial discharge voltage between ZnO/ epoxy and SiO_2/ epoxy composites were carried out by using the needle plate electrode system. It is found that when the mass fraction of nanometer ZnO is 15, the composite begins to exhibit nonlinear conductivity, and the dielectric constant of the composite also changes significantly. When the mass fraction is 30, the nonlinear coefficient of conductivity can reach 18.7, and the dielectric constant can rise to 5.9. At the same electrode structure, the initial partial discharge voltage of nano-sized ZnO/ epoxy composites is significantly higher than that of SiO_2/ epoxy composites with a mass fraction of 15. Compared with the non-doped resin and the nano-SiO_2 doped resin, it increased by 33% and 22%, respectively. The results show that the introduction of nanometer ZnO particles can significantly improve the insulating properties of epoxy resin composites, and the interfacial effect and nonlinear conductivity of nano ZnO particles play a major role in improving the insulating properties of composite resins.
【作者单位】：西安理工大学电力工程系;安徽理工大学电气与信息工程学院;
【基金】：国家自然科学基金(51607003;51279161) 西北旱区生态水利工程国家重点实验室基金(2016ZZKT-12) 陕西省教育厅科研计划项目基金(16JK1562)~~
【分类号】：TM215.1

【相似文献】