Effect of electron shallow trap on breakdown performance of transformer oil-based nanofluids
Effect of electron shallow trap on breakdown performance of transformer oil-based nanofluids
复制标题
电子浅陷阱对变压器油基纳米流体击穿性能的影响
DOI：
10.1063/1.3660783
复制
发表时间：
2011-11-15
影响因子：
3.2
通讯作者：
Tu, Youping
中科院分区：
文献类型：
--
作者：
Du, Yuefan;Lv, Yuzhen;Tu, Youping
具有TiO 2纳米颗粒的Transformer油基纳米流体表现出比纯Transformer油高得多的AC和正脉冲击穿电压水平。采用热激电流法（TSC）和脉冲电声技术（PEA）测量了纯油和纳米流体的电荷陷阱和输运特性。研究发现，纳米流体中电子浅陷阱密度和电荷衰减速率大大增加，即，通过在纳米流体的浅阱中的电子俘获和释放，快电子可以被转换成慢电子，从而导致与纯油相比改进的击穿性能。
Transformer oil-based nanofluids with TiO2 semiconductive nanoparticles exhibit substantially higher AC and positive impulse breakdown voltage levels than that of pure transformer oils. Thermally stimulated current method (TSC) and pulse electroacoustic technique (PEA) have been used to measure charge trap and transportation characteristics of pure oils and nanofluids. It is found that electron shallow trap density and charge decay rate are greatly increased in nanofluids, i.e., fast electrons may be converted to slow electrons by electron trapping and de-trapping in shallow traps of nanofluids, resulting in improved breakdown performance compared to that of pure oil.