电工技术学报2017，Vol.32Issue(11)：225-232,8.
纳米Al2O3掺杂对绝缘纸热老化电气特性的影响
Influence of Nano-Al2O3 on Electrical Properties of Insulation Paper under Thermal Aging
摘要
Abstract
In order to study the effect of nano-Al2O3 on the electrical properties of insulation paper under thermal aging, composite paper with 2% nano-Al2O3 and conventional paper were prepared, then the accelerated thermal aging test under 130 ℃ with conventional oil-paper and nano-Al2O3 composite oil-paper were performed.The main electrical parameters of paper and aging products in oil-paper system were tested.The modification mechanisms of nano-Al2O3 on electrical properties were researched, and the variations in properties of insulation paper during aging process were analyzed.The research results show that nano-Al2O3 improves the electrical properties and anti-aging ability of composite paper.The electric double layer structure of nano-Al2O3 can weaken the interfacial polarization and dipole polarization, which reduces the permittivity and dielectric loss.It is considered that nano-Al2O3 effectively decreases the carrier mobility and increases the volume resistivity of composite paper.High thermal conductivity of Al2O3 and the connection structure between nano-Al2O3 and cellulose chains may increase the thermal conductivity of insulation paper and accelerate the heat diffusion in composite paper, so that the anti-aging ability of composite paper gets enhanced.关键词
绝缘纸/纳米Al2O3/电气特性/热老化/热导率Key words
Insulation paper/nano-Al2O3/electrical properties/thermal aging/thermal conductivity分类
信息技术与安全科学引用本文复制引用
鄢水强,廖瑞金,吕彦冬,赵学童,何利华..纳米Al2O3掺杂对绝缘纸热老化电气特性的影响[J].电工技术学报,2017,32(11):225-232,8.基金项目
国家自然科学基金(51437001)、国家创新研究群体基金(51321063)和中国电力科学研究院科技项目(GY71-14-001)资助. （51437001）
