METHOD OF STRONTIUM CARBONATE AND IRON OXIDE MIXTURE MILLING IN STRONTIUM HEXAFERRITE PRODUCTION Russian patent published in 2017 - IPC C04B35/26 C04B35/626 C01G49/00 

FIELD: chemistry.

SUBSTANCE: wet milling of the stoichiometric mixture of strontium carbonate and iron oxide is carried out in an acidic medium containing polyacrylic acid and isopropanol in the following ratio, wt %: 0.2-0.6 of polyacrylic acid, 4.0-10.0 of isopropyl alcohol, 0.2-1.0 of calcium carbonate, 28-45 of water, stoichiometric mixture of strontium carbonate and iron oxide - the rest. Application of the proposed milling method allows considerable reduction of the charge firing temperature to provide the specific magnetization of not less than 50 nT⋅m³/Kg, and temperature of moulded workpieces subsequent sintering.

EFFECT: increased coercive force of strontium hexaferrite magnetization of more than 235 kA/m, and increased activity during raw ferrite components mixture in strontium hexaferrite production.

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