METHOD FOR MANUFACTURE OF PERMANENT MAGNETS FROM RARE-EARTH METALS Russian patent published in 1997 - IPC

FIELD: electronic and electrical engineering. SUBSTANCE: method involves producing powder by high-speed hardening of melt; grinding powder to particle size of 5-7 micron; separating quickly hardened powder initially at external magnetic field intensity of 350-800 Oe. Coercive force of powder, increased by 10% (2-4 kOe) in the process of manufacture of permanent magnets with extreme density and remnant magnetization, causes increase in the level of magnetic energy by 1.5-4.0 mG. EFFECT: increased efficiency, reduced weight and sizes of instruments and radioelectronic equipment. 2 cl, 2 dwg, 1 tbl