Počet záznamů: 1

The role of particles annealing temperature on magnetorheological effect

  1. 1.
    0360529 - UH-J 2012 RIV SG eng C - Konferenční příspěvek (zahraniční konf.)
    Sedlačík, M. - Pavlínek, V. - Sáha, P. - Švrčinová, Petra - Filip, Petr
    The role of particles annealing temperature on magnetorheological effect.
    Electro-Rheological Fluids and Magneto-Rheological Suspensions. Proceedings of the 12th International Conference. Singapore: World Scientific, 2011 - (Tao, R.), s. 363-368. ISBN 978-981-4340-22-9.
    [International Conference on Electro-Rheological Fluids and Magneto-Rheological Suspensions /12./. Philadelphia (US), 16.08.2010-20.08.2010]
    Grant ostatní:GA ČR(CZ) GA202/09/1626
    Program:GA
    Výzkumný záměr: CEZ:AV0Z20600510
    Klíčová slova: cobalt ferrite * annealing process * magnetometry * magnetization
    Kód oboru RIV: BK - Mechanika tekutin

    The spinel cobalt ferrite (CoFe2O4) nanoparticles were prepared via a sol-gel method followed by the annealing process. Their structural, magnetic and magnetorheological (MR) properties depending upon the annealing temperature were investigated. The X-ray diffraction analysis revealed that the higher annealing temperature, the larger grain size of CoFe2O4 particles resulting in larger magnetic domains in particles. The saturation magnetization, determined via a vibrating sample magnetometry, increased with annealing temperature and, in contrast, the coercivity decreased. The rheological behavior of CoFe2O4 particles based MR suspensions determined under the small-strain oscillatory shear flow in magnetic field showed that higher annealing temperature reflects in larger changes of rheological properties.
    Trvalý link: http://hdl.handle.net/11104/0198048
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