The effect of mechanochemical activation on the formation of a cobalt ferrite phase from iron and cobalt oxalates was studied. X-ray phase, x-ray diffraction, and simultaneous thermal analysis, scanning electron microscopy, and the low-temperature nitrogen adsorption-desorption method were used to study the composition and properties of the resulting product. It was established that on solid-phase interaction of the initial components cobalt ferrite is formed at 1100°C. Preliminary mechanochemical activation of the initial components in a roll-ring vibratory mill makes it possible to reduce the temperature of cobalt ferrite synthesis to 400°C. The properties of cobalt ferrite can be improved by lowering its synthesis temperature. It is shown that CoFe2O4 obtained by the mechanochemical method of synthesis has a more developed specific surface area and porous structure compared to cobalt ferrite obtained by solid-phase interaction of the initial components without pretreatment.
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Translated from Steklo i Keramika, No. 1, pp. 21 – 30, January, 2022.
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Ptitsyna, K.O., Il’in, A.A., Rumyantsev, R.N. et al. Mechanochemical and Ceramic Synthesis of Cobalt Ferrite. Glass Ceram 79, 15–21 (2022). https://doi.org/10.1007/s10717-022-00446-9
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DOI: https://doi.org/10.1007/s10717-022-00446-9