PROCESS FOR PREPARATION OF NANOSIZED BARIUM HEXAFERRITE PARTICLES Russian patent published in 2017 - IPC C01F11/00 B82B3/00 H01F1/10 C04B35/26 

FIELD: chemistry.

SUBSTANCE: method for barium hexaferrite nanoscale particles production includes mixing of a barium nitrate solution in distilled water with a ferric nitrate solution in glycerol and distilled water solution to achieve the atomic ratio Ba/Fe=1:10, continuous heating and stirring at 50°C for one hour, addition of ammonia and polyethylene glycol in a ratio of 5:1, stirring of the resulting mixture at 80°C for 8 hours and centrifuging at a speed of 11000 rpm, calcination at 450°C for 1.5 hours, and sintering at 1000-1100 °C. All heating and stirring processes are conducted under the influence of continuous ultrasonic irradiation with frequency of 10-25 kHz.

EFFECT: increased homogeneity of barium hexaferrite nanoparticles size.

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