Abstract
A method has been proposed for the preparation of nickel ferrite nanoparticles in a system of direct sodium dodecyl sulfate micelles using ion flotation. Amorphous nickel ferrite nanoparticles with the overall composition xNiFe2O4 · yFe2O3 · zH2O, containing dodecyl sulfate anion impurities, have been prepared. According to transmission electron microscopy results, the size distribution of the synthesized nanoparticles has a maximum in the range 4 to 6 nm, and the ferrite is X-ray amorphous. The blocking temperature of the synthesized nanoparticles is 25 K. The ferrite possesses superparamagnetic properties, with a specific saturation magnetization of 15 A m2/kg at 5 K.
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Original Russian Text © Yu.A. Mirgorod, N.A. Borshch, V.M. Fedosyuk, G.Yu. Yurkov, 2012, published in Neorganicheskie Materialy, 2012, Vol. 48, No. 12, pp. 1375–1380.
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Mirgorod, Y.A., Borshch, N.A., Fedosyuk, V.M. et al. Magnetic properties of nickel ferrite nanoparticles prepared using flotation extraction. Inorg Mater 49, 109–114 (2013). https://doi.org/10.1134/S0020168512110064
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DOI: https://doi.org/10.1134/S0020168512110064