METHOD OF GRINDING THE MIXTURE OF STRONTIUM CARBONATE AND IRON OXIDE IN THE PRODUCTION OF STRONTIUM HEXAFERRITES Russian patent published in 2018 - IPC C04B35/26 C04B35/632 C01G49/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of magnetically hard ferrites and can be used in the manufacture of strontium hexaferrites. Wet grinding of the stoichiometric mixture of strontium carbonate and iron oxide is carried out in a medium containing oxalic acid, octanol, isopropyl alcohol and oleic acid with the following component ratio, wt %: oxalic acid 0.2–0.6, octanol 0.1–0.4, isopropyl alcohol 2.0–5.0, oleic acid 0.1–0.5, water 28–45, stoichiometric mixture of strontium carbonate and iron oxide – the rest.

EFFECT: technical result is an increase in activity in the grinding of a mixture of the initial ferrite forming components in the production of strontium hexaferrite, which provides an increase in the coercive force in terms of magnetization of strontium hexaferrite over 235 kA/m due to a decrease in the synthesis and calcination temperature.

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