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The influence of high dielectric constant core on the activity of core/shell structured electrorheological fluid

The influence of high dielectric constant core on the activi...

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第六届全国电磁流变液及其应用学术会议

作者： jinghua wu, yuchuan cheng, jianjun guo, fenghua liu, gaojie xu, ping cui ningbo institute of material technology and engineering, chinese academy of sciences, ningbo 315201

The core/shell structured dielectric particles are applied widely in the electrorheological (ER) fluid,and many theories about giant ER effect are based on core/shell structured *** purpose of this paper is to investigate the role of different dielectric core on the interaction between core/shell structured ER *** this work,we successfully

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The Size Effect on the Electrorheologcial Suspension

The Size Effect on the Electrorheologcial Suspension

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第七届全国液体和软物质物理学术会议

作者： yuchuan cheng,jianjun guo,xuehui liu,gaojie xu,ping cui ningbo institute of material technology and engineering,chinese academy of sciences,ningbo 315201

Electrorheological(ER) fluids are a kind of smart material consisting of dielectric colloid particles dispersed in an insulating *** the work,the spherical silicate particles with different sizes were modified by -OH ... 详细信息

关键词： size effect surface-modified electrorheological fluid

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Study of the current density in CTO based electrorheological fluid at high volume fraction

Study of the current density in CTO based electrorheological...

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第六届全国电磁流变液及其应用学术会议

作者： Zhenyang Song, jianjun guo, yuchuan cheng, jinghua wu, gaojie xu ningbo institute of material technology and engineering, chinese academy of sciences, ningbo City, Zhejiang Province, P. R. China, 315201

As a material for giant electrorheological (ER) fluid, Calcium-Titania Oxalate (CTO) is well known for its excellent yield behavior under applied electric field and relatively low current density. Its ER efficiency, calculated by dividing the yield stress under 5kV/mm by the yield stress under zero field, is also much higher than that of conventional ER fluid at high volume fraction. However, we observed the decrease of the ER efficiency with the increasing volume fraction after it exceeds a certain value. At the same time, the current density of the ER fluid, normalized by the volume fraction, shows a similar behavior as the ER efficiency. As it is widely accepted, the magnitude of current density represents the scale of the local electric field, thus corresponds to the interparticle interaction between two adjacent particles. So we consider the increase of the volume fraction of disperse phase after it exceeds a certain value could result in a decrease in the interparticle interaction between two particles, thus diminish the ER efficiency of the CTO based ER fluid.

关键词： CTO ER efficiency current density volume fraction interparticle interaction

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Influence of volume fraction on GER yield behavior and current density

Influence of volume fraction on GER yield behavior and curre...

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第六届全国电磁流变液及其应用学术会议

The recently invented giant electrorheological(GER) fluid has attracted much interest for its excellent mechanical properties and relatively low leak current ***,we reported the influence of the volume fraction on the static yield stress of the CTO based GER *** is found that the static yield stress increases exponentially with the particle volume fraction,much different from the linear

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