TiO_2纳米粒子对矿物及植物纳米变压器油中电荷输运特性的影响(英文)

编号：NMJS03874

篇名：TiO_2纳米粒子对矿物及植物纳米变压器油中电荷输运特性的影响(英文)

作者：杜岳凡； 李成榕； 吕玉珍； 钟宇翔； 陈牧天； 周游；

关键词：semiconductive nanoparticles； mineral oil； nanofluid； transformer oil； charge shallow trap； charge t

机构： Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility, School of Electric and Ele

摘要： TiO2 semiconductive nanoparticles are added into mineral and ester based transformer oil to form semiconductive nanofluids (SNFs) with the aim of enhancing the oil’s insulating performance. Charge accumulation and decay characteristics of both pure oils and SNFs are measured by pulse electroacoustic (PEA) technique. The result reveals that compared with pure oil, SNFs have more uniform in- ternal electric fields with voltage applied and higher charge decay rate after removing the applied voltage. This is caused by the increase of shallow trap density in SNFs, due to the test results of thermally stimulated current (TSC). It is proposed that the electron trapping and de-trapping processes in shallow traps could be the main charge transport processes in the nanofluid transformer oil.