Scholarly record
POSSIBILITY EVALUATION OF USING COLLOID-DISPERSED SYSTEMS BASED ON MAGNETITE AS AN ELECTRIC CURRENT SOURCE
Abstract
The ability of a moving charge to create a vortex magnetic field around itself is well known. This phenomenon formed the basis for the creation of electromagnets. The reverse process is electromagnetic induction, when a magnet moving with acceleration becomes a source of electric current in a closed conducting circuit. In this regard, ferromagnetic fluids are of some interest. Ferromagnetic fluid is an aggregatively stable colloidal system consisting of nanosized particles of a dispersed phase uniformly distributed in a dispersion medium. Thus, ferrofluid can be considered as a set of nanoscale magnets freely moving in a carrier fluid. In this paper, we consider the possibility of obtaining magnetic fluid from natural magnetite and its use as a source of electric current under forced mechanical external influence (vibration). In the course of laboratory experiments, a finely divided fraction of magnetite was obtained through its mechanical activation at the Retsch PM100 planetary ball mill. An alcohol base (ethanol) was used as the carrier fluid. The resulting suspension was placed in a plastic cylinder with a diameter of 20 mm and a height of 40 mm, around which a coil of insulated copper wire with a diameter of 0.38 mm was formed. This cell was connected to a milliammeter for measuring electric current and placed on a vibration platform. It is noted that after the start of the oscillatory movements of the vibration platform, the milliammeter showed the presence of alternating current in the system. In the continuation of the research, it was found that at a given dispersion degree of the dispersed phase substance, the magnitude of the electric signal depends on the magnetite concentration, geometric dimensions of the cell, and the intensity of the external mechanical action.
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References19
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Rednikov S.N., Ahmedyanova E.N., Ahmedyanova K.T., Ispolzovanie tokovyh metodov kontrolya sostoyaniya elementov privodov metallurgicheskih agregatov [Use of current methods for monitoring the state of drive elements of metallurgical aggregates], Nauka i biznes: puti razvitiya, Russia, №11, pр 27-29, 2018.
Irodov I. E., Elektromagnetizm. Osnovnye zakony [Electromagnetism. Basic laws], Russia, 319 p., 2014.
Berkovskij B.M., Medvedev V.F., Krakov M.S., Magnitnye zhidkosti [Ferrofluids], Russia, 240 p., 1985.
Kalaeva S.Z., Makarov V.M., Shipilin A.M., Zaharova I.N., Primenenie magnitnyh zhidkostej iz zhelezosoderzhashchih othodov dlya ochistki stochnyh vod ot nefteproduktov [Application of ferrofluids from iron-containing waste for waste water treatment from petroleum products] / II Rossijskaya nauchno-prakticheskaya konferenciya «Fiziko-tekhnicheskie problemy sozdaniya novyh tekhnologij v agropromyshlennom komplekse», Russia, 2003, pp 25-27.
Rinkk P.A., Magnitnyj rezonans v medicine [Magnetic resonance in medicine], Russia, 256 p., 2003.
El-Boubbou, K., Magnetic iron oxide nanoparticles as drug carriers: preparation, conjugation and delivery, Nanomedicine, Vol. 13, No. 8, DOI: 10.2217/nnm-2017-0320, 2018, pp. 929–952.
Voit, W., Kim, D., Zapka, W., Muhammed, M., & Rao, K., Magnetic behavior of coated superparamagnetic iron oxide nanoparticles in ferrofluids, MRS Proceedings. Vol. 676. DOI: 10.1557/PROC-676-Y7.8., 2011.
Massart, R., Preparation of Aqueous Magnetic Liquids In Alkaline and Acidic Media, IEEE Transactions On Magnetics, Vol 17, No. 2, 1981, pp. 1247-1248.
Avdusheva M.A., Ayzenshtadt A.M., Agregativnaya ustojchivost vodnyh dispersnyh sistem na osnove magnetite [Aggregate stability of magnetite-based aqueous dispersed systems], Vestnik BGTU im. V.G. Shuhova Russia, №1, pp 16–20, 2019.
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