Enhanced conductivity of magnetorheological fluids based on silver coated carbonyl particles

被引:0
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作者
Yuehua Huang
Yuhuan Jiang
Xiongbo Yang
Hongyu Sun
Hongguang Piao
Ruizhen Xu
机构
[1] China Three Gorges University,College of Electrical Engineering and New Energy
[2] China Three Gorges University,College of Science
[3] Tsinghua University,Beijing National Center for Electron Microscopy, School of Materials Science and Engineering, The State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials (MOE)
关键词
Carbonyl Iron; Silver Coating; Absolute Ethyl Alcohol; Parallel Magnetic Field; Carbonyl Iron Particle;
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学科分类号
摘要
Magnetorheological fluid (MRF) are mostly characterized by a remarkable change in their rheological behavior. However, the poor conductivity limit their potential electrical applications. To enhance the electrical properties of MRF, MRF based on silver-coated carbonyl iron (CI) micro-particles dispersed in silicon oil with oleic acid and addictives are prepared. The electrical properties of MRF were remarkably improved due to the inherent outstanding electrical conductivity of silver. The saturation resistance of the modified MRF was about three order magnitude reduced from 7.7 to 14 KΩ. Moreover, the magnetic response speed was around 7 times faster than that of the un-modified materials. Coating good conductivity material on CI particles offers a more practical new mean to improve the electrical characteristics of MRF.
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页码:255 / 259
页数:4
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