基于变压器油的纳米流体电物理特性测量

IF 1.1 4区 物理与天体物理 Q4 PHYSICS, APPLIED
S. M. Korobeynikov, V. E. Shevchenko, A. V. Ridel
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引用次数: 0

摘要

制备了几种具有不同介电和导电纳米颗粒浓度的纳米油样品,以描述纳米流体的电物理特性。实验测量了纳米流体的介电常数和电导率。将处理后的实验结果与尼尔森公式计算结果进行了比较。对比分析表明,电导率的计算值与实验值在定性上一致,电导率对颗粒浓度的依赖关系在实验值与计算值之间存在显著差异。这种计算结果与实验结果之间的差异是由于离子在颗粒表面的吸附及其随后的沉降。电导率的降低可能是由于可移动粒子数量的减少,以及在弱电场下与离子相比,它们的迁移率明显降低的事实。用二氧化硅颗粒和添加油酸对纳米流体的电导率进行了额外的测量,再现了所观察到的电导率下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Measurement of Electrophysical Characteristics of Nanofluids Based on Transformer Oil

Measurement of Electrophysical Characteristics of Nanofluids Based on Transformer Oil

Several samples of nano-oil with different concentrations of dielectric and conductive nanoparticles are prepared to describe the electrophysical characteristics of nanofluids. Permittivity and conductivity of the nanofluids are experimentally measured. The processed experimental results are compared with the calculated results obtained using the Nielsen formula. The comparative analysis shows qualitative agreement of the calculated and experimental values of permittivity and a significant difference between the experimental and calculated dependences of conductivity on the concentration of particles. Such a difference between the calculated and experimental results is due to the adsorption of ions on the surface of the particles and their subsequent sedimentation. A decrease in the conductivity can be due to a decrease in the number of mobile particles and the fact that they have significantly less mobility compared to ions in the presence of weak electric fields. Additional measurements of the conductivity of nanofluids with particles of silicon dioxide and added oleic acid reproduce the observed decrease in the conductivity.

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来源期刊
Technical Physics
Technical Physics 物理-物理:应用
CiteScore
1.30
自引率
14.30%
发文量
139
审稿时长
3-6 weeks
期刊介绍: Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.
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