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The Transmission Character of BaTiO3 ER Fluids under the Electric Field and Microwave
Fan Jijun,Guan Litao,Zhao Xiaopeng
Author NameAffiliation
Fan Jijun Institute of Electrorheological Technology, Northwestern Polytechnical University, Xi’an 710072 
Guan Litao Institute of Electrorheological Technology, Northwestern Polytechnical University, Xi’an 710072 
Zhao Xiaopeng Institute of Electrorheological Technology, Northwestern Polytechnical University, Xi’an 710072 
Abstract:
The perpendicular and paralleling relationships of the direction of microwave propagation and the particle chains in ER fluids were considered, respectively. The behavior of microwav propagation in BaTiO3ER fluids was studied. It is found that the transmittance in the fluids coul be adjusted under external electric field. In the perpendicular condition, the transmittance decreases with field intensity when the concentration of the fluid is low. The amplitude of transmittance can increase with the concentration of the fluid. When the concentration exceeds a criticavalue, the transmittance decreases first, then increases with field intensity, there is a minimum value of the transmittance. In the paralleling condition, the transmittance decreases with electri intensity. Moreover, the behavior of microwave transmission displays the delaying character With the increasing of field intensity, the delaying character weakens.
Key words:  Electrorheological fluids, BaTiO3, Microwave transmission, Delaying character
FundProject:国家自然科学基金重点项目(59832090)和国家杰出青年科学基金(50025207)资助.
外电场与微波交互作用下BaTiO3电流变液的透射特征
范吉军,关丽涛,赵晓鹏
摘要:
分别考虑了微波传播方向与电流变液颗粒链相垂直和平行的情况,对BaTiO3电流变液微波透射行为进行了实验研究.发现BaTiO3电流变液微波透射率可由外电场调控.在垂直的情形,当流体浓度较低时,透射率随电场强度增加而减小,并且随浓度增加电场调节微波透射率的变化幅度增加.浓度超过一定值时,透射率随电场出现由减小向增加的改变,存在透射率的极小点.在平行的情形,发现透射率随电场强度增加而减小.另外透射率随电场强度变化具有延时性,对于给定浓度的情形,电场强度增加延时性明显减小.
关键词:  电流变液  BaTiO3  微波透射  延时性
DOI:10.1088/1674-0068/14/5/637-640
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