The phase composition, structural parameters, and basic magnetic characteristics of BaFe12O19 hexaferrites prepared by the mechanochemical synthesis with subsequent annealing at a temperature of 1000°С and 1100°С for 1 h are investigated. The influence of the annealing temperature on the properties of synthesized materials is analyzed. Values of the saturation magnetization and the anisotropy field are determined. It is established that annealing temperature in the interval 1000 - 1100 °C does not significantly affect on the phase composition and the size of nanoparticles. The value of the anisotropy field increases substantially with increasing temperature.

Проведен мягкий механохимический синтез наноразмерного порошка магнетита без введения инертного разбавителя NaCl в реакционную смесь. Подтвержден прекурсор конечного продукта – Disodium tetraaquabis(sulfato)iron (II), который при последующем нагревании разрушается с образованием магнетита. Определены физико-химические свойства синтезированного продукта.

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Nanosized powders of magnetite and cobalt ferrospinel are obtained by the mechanochemical synthesis method. The phase composition and structural properties (lattice parameters, coherent scattering regions and internal elastic microstresses) of the synthesized materials are investigated. The surface properties of nanosized CoFe2O4 and Fe3O4 powders are studied by gas-phase sorption of molecules with different acid-base characteristics. The data obtained can be used to analyze the sorption properties of nanoferrimagnetics with respect to biological compounds in aqueous solutions.

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