An experimental study of magnetorheological fluids on electrical conductivity property

Yang, Xiya; Huang, Yuehua; Hou, Yaqian; Wu, Hao; Ren-ping, XU; Chu, Paul K.

doi:10.1007/s10854-017-6519-0

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…The magneto-conductive properties of MRFs and their solid-state analogs and magnetorheological elastomers are currently receiving increasing attention. Yang et al (2017) demonstrated that the appropriate amount of ferromagnetic particles is beneficial in improving the electrical conductivity of MRFs. Ruan et al (2017) analyzed the effect of magnetic field, volume fraction of carbonyl iron powder particles, and applied oscillatory shear force on the conductivity of MRFs and modeled the resistance between particles to explain the resistance changes of MRFs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on the Dependence of the Capacitance of Magnetorheological Fluids on Frequency

Zhu

Ma²,

Huang³

et al. 2022

Front. Mater.

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The capacitance characteristics of magnetorheological fluids (MRFs) were studied experimentally based on simulation analysis. The nonlinear relationship between the capacitance of MRFs and electric field frequency was measured by the self-made circuit device. The effects of magnetic induction intensity and particle volume fraction on the capacitance characteristics of MRFs were investigated. The results show that the nonlinear dependence of the capacitance of an MRF on frequency induced by the effect of tunnel current decreases with the increase in frequency. The capacitance of an MRF is directly related to the particle structures. The capacitance of the MRF with a chain particle structure is greater than that of the MRF with a random particle distribution. The smaller the clearance between the adjacent particles, the greater the capacitance of the MRF. The network particle structure and particle contact will reduce the capacitance of an MRF. The capacitance of an MRF increases with the increment of external magnetic field. The capacitance of an MRF with higher particle volume fraction is smaller than that of an MRF with lower particle volume fraction.

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Section: Introductionmentioning

confidence: 99%

Experimental Analysis on the Dependence of the Capacitance of Magnetorheological Fluids on Frequency

Zhu

Ma²,

Huang³

et al. 2022

Front. Mater.

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Magnetic field stimulated dielectric, electronic and thermal properties of magnetite nano-hollow spheres based magnetorheological fluids

Saha

Mandal

2023

Journal of Magnetism and Magnetic Materials

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Magnetodielectric and Rheological Effects in Magnetorheological Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles

Bunoiu,

Bica,

Anitas

et al. 2024

Materials

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This study aims to develop low-cost, eco-friendly, and circular economy-compliant composite materials by creating three types of magnetorheological suspensions (MRSs) utilizing lard, carbonyl iron (CI) microparticles, and varying quantities of gelatin particles (GP). These MRSs serve as dielectric materials in cylindrical cells used to fabricate electric capacitors. The equivalent electrical capacitance (C) of these capacitors is measured under different magnetic flux densities (B≤160 mT) superimposed on a medium-frequency electric field (f = 1 kHz) over a period of 120 s. The results indicate that at high values of B, increasing the GP content to 20 vol.% decreases the capacitance C up to about one order of magnitude compared to MRS without GP. From the measured data, the average values of capacitance Cm are derived, enabling the calculation of relative dielectric permittivities (ϵr′) and the dynamic viscosities (η) of the MRSs. It is demonstrated that ϵr′ and η can be adjusted by modifying the MRS composition and fine-tuned through the magnetic flux density B. A theoretical model based on the theory of dipolar approximations is used to show that ϵr′, η, and the magnetodielectric effect can be coarsely adjusted through the composition of MRSs and finely adjusted through the values B of the magnetic flux density. The ability to fine-tune these properties highlights the versatility of these materials, making them suitable for applications in various industries, including electronics, automotive, and aerospace.

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An experimental study of magnetorheological fluids on electrical conductivity property

Cited by 3 publications

References 27 publications

Experimental Analysis on the Dependence of the Capacitance of Magnetorheological Fluids on Frequency

Experimental Analysis on the Dependence of the Capacitance of Magnetorheological Fluids on Frequency

Magnetic field stimulated dielectric, electronic and thermal properties of magnetite nano-hollow spheres based magnetorheological fluids

Magnetodielectric and Rheological Effects in Magnetorheological Suspensions Based on Lard, Gelatin and Carbonyl Iron Microparticles

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