Study of Microwave Reflection Behaviour in Fe3O4 Magnetorheological Fluids

Nan Hui Yu; Ji Jun Fan

doi:10.4028/www.scientific.net/AMR.287-290.2785

Paper Titles

Investigation on New Submersed Entry Nozzle in Slab Caster
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Structure Design for Resonant Diaphragm Liquid Density Sensor
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Health Monitoring of RC Frame Structure to Shake Table Excitations
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Velocities of Starch Particles in ER Fluids Measured with Laser Speckle
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Study of Microwave Reflection Behaviour in Fe₃O₄ Magnetorheological Fluids
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Detecting Centroid Projection for a Quadruped Robot with Hand-Fused Foot Based on ARM
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Effect of HPC on the Thermo-Sensitive and Hydrophilicity of PAN Films
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Application of Wavelet Analysis in the DPIV Information Processing for the River Model Test
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Turbine Blade Aerodynamic Optimization Based on Variable Dimensionality Model
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Study of Microwave Reflection Behaviour in Fe₃O₄ Magnetorheological Fluids

Abstract:

Owing to its unique properties and wide engineering applications, magnetorheological fluids (MRF) has become a hot study area in the field of smart materials. In this paper experimental study of the microwave reflection behavior in MRF was carried out. The results indicated that at the same frequency the microwave reflectivity of MRF decreased with the increasing of magnetic field strength; and with the particle concentration increasing, microwave reflectivity first increased, then decreased, there is a critical concentration of 15%. Under the same magnetic field, with the increasing of microwave frequency, it first decreased, there is a lowest point at 9.2GHz, and then it increased. Usually, it is considered that the change of internal structure of MRF under external magnetic field is the main reason for the regulation behavior of microwave reflectivity.