Electric field regulating behaviour of microwave propagation in ER fluids

A model for microwave propagation through electrorheological (ER) fluids is established on the basis of the experimentally shown fact that the structure and the dielectric properties of ER fluids change with the external electric field. The theoretical simulation shows that the microwave transmittan...

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Veröffentlicht in:Journal of physics. D, Applied physics Applied physics, 2002-01, Vol.35 (1), p.88-94
Hauptverfasser: Fan, Jijun, Zhao, Xiaopeng, Gao, Xiumin, Cao, Changnian
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container_issue 1
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container_title Journal of physics. D, Applied physics
container_volume 35
creator Fan, Jijun
Zhao, Xiaopeng
Gao, Xiumin
Cao, Changnian
description A model for microwave propagation through electrorheological (ER) fluids is established on the basis of the experimentally shown fact that the structure and the dielectric properties of ER fluids change with the external electric field. The theoretical simulation shows that the microwave transmittance increases with the dielectric constant of ER fluids if the dielectric constant of the ER fluids is larger than that of the container. Otherwise it decreases with the dielectric constant. The experimental results reveal that the microwave transmittance in the ER fluids can be adjusted by changing the dc field strength. The microwave transmittance increases with the field strength when the concentration of the fluid is low, but it decreases when it is high. The phenomenon that the microwave transmission can be adjusted in the ER fluids is attributed to the changes of the structure and the dielectric properties of the ER fluids under the external electric field. (Author)
doi_str_mv 10.1088/0022-3727/35/1/314
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The theoretical simulation shows that the microwave transmittance increases with the dielectric constant of ER fluids if the dielectric constant of the ER fluids is larger than that of the container. Otherwise it decreases with the dielectric constant. The experimental results reveal that the microwave transmittance in the ER fluids can be adjusted by changing the dc field strength. The microwave transmittance increases with the field strength when the concentration of the fluid is low, but it decreases when it is high. The phenomenon that the microwave transmission can be adjusted in the ER fluids is attributed to the changes of the structure and the dielectric properties of the ER fluids under the external electric field. 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source IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link
subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Liquids and liquid crystals
Liquids, emulsions, and suspensions
liquid crystals
Microwave and radio-frequency interactions
Microwave and radio-frequency interactions (excluding resonances)
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other interactions of matter with particles and radiation
Physics
title Electric field regulating behaviour of microwave propagation in ER fluids
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