Journal of Industrial and Engineering Chemistry, Vol.13, No.2, 299-304, March, 2007
Giant Resistances Based on Magnetorheological Suspensions
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This paper describes a study of resistors based on magnetorheological suspensions (MRSs). The resistors have their active part of the MRSs based on mineral oil with stearic acid, iron micro-particles (2.10 μm mean diameter), and styrene acrylate copolymer iron oxide (7.5 μm granulation) powder. The MRS is obtained by thermal decomposition of Fe2(CO)9 in mineral oil with stearic acid to which styrene acrylate copolymer iron oxide powder had been added. The resistors have finite resistance only in the presence of an external magnetic field. The value of the resistance was influenced considerably by the intensity of the magnetic field applied and also by the quantity of styrene acrylate copolymer iron oxide powder. The mechanisms related to the onset of the electrical conduction phenomenon in the MRSs are presented and the results obtained are discussed.
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