ELECTROLYTIC METHOD FOR OBTAINING ULTRADISPERSE POWDER OF LANTHANUM HEXABORIDE Russian patent published in 2013 - IPC C25B1/24 C01F17/00 

FIELD: metallurgy.

SUBSTANCE: method for obtaining pure lanthanum hexaboride is implemented by combined electrodeposition of lanthanum and boron from chloride molten metal on the cathode and their further interaction at atomic level. The process is performed in three-electrode quartz cell, where a tungsten bar serves as a cathode; a glassy carbon bar sealed in pyrex glass serves as a comparison electrode; a glassy carbon melting pot serves as anode and at the same time as a container. Synthesis of ultradisperse powder of lanthanum hexaboride is performed by means of controlled potential electrolysis from equimole KCl-NaCl melt containing lanthanum trichloride and potassium fluoroborate in the environment of cleaned and dried argon at potentials of -2.0 to -2.6 V relative to glassy carbon comparison electrode at the temperature of 700±10°C.

EFFECT: obtaining pure target product owing to good solubility of background electrolyte in water; reduction of electric power costs.

2 cl, 3 ex