Influence of Monodisperse Fe3O4 Nanoparticle Size on Electrical Properties of Vegetable Oil-Based Nanofluids
Influence of Monodisperse Fe3O4 Nanoparticle Size on Electrical Properties of Vegetable Oil-Based Nanofluids
复制标题
单分散 Fe3O4 纳米颗粒尺寸对植物油基纳米流体电性能的影响
DOI：
10.1155/2015/560352
复制
发表时间：
2015-01-01
影响因子：
--
通讯作者：
Yao, Shuhan
中科院分区：
文献类型：
--
作者：
Du, Bin;Li, Jian;Yao, Shuhan
由纳米粒子（通常称为纳米流体）改性的绝缘油最近引起了相当大的关注，特别是在改善纳米流体的电击穿和导热性方面。本文制备了三种尺寸的单分散 Fe3O4 纳米粒子，然后将其分散到绝缘植物油中以获得纳米流体。通过自然沉降和zeta电位测量来检查纳米粒子在纳米流体中的分散稳定性。对这些纳米流体的电击穿强度、空间电荷分布和一些介电特性（例如介电常数、介电损耗和体积电阻率）进行了比较研究。实验结果表明，单分散Fe3O4纳米粒子不仅增强了纳米流体的介电强度，而且使电场均匀化。分析了绝缘植物油和纳米流体的电势阱深度，以阐明纳米粒子对电子捕获和植物油绝缘改善的影响。
Insulating oil modified by nanoparticles (often called nanofluids) has recently drawn considerable attention, especially concerning the improvement of electrical breakdown and thermal conductivity of the nanofluids. In this paper, three sized monodisperse Fe3O4 nanoparticles were prepared and subsequently dispersed into insulating vegetable oil to achieve nanofluids. The dispersion stability of nanoparticles in nanofluids was examined by natural sedimentation and zeta potential measurement. The electrical breakdown strength, space charge distribution, and several dielectric characteristics, for example, permittivity, dielectric loss, and volume resistivity of these nanofluids, were comparatively investigated. Experimental results show that the monodisperse Fe3O4 nanoparticles not only enhance the dielectric strength but also uniform the electric field of the nanofluids. The depth of electrical potential well of insulating vegetable oils and nanofluids were analyzed to clarify the influence of nanoparticles on electron trapping and on insulation improvement of the vegetable oil.