Rare Earth Composite Magnets with Increased Resistivity

摘要

Dielectric rare earth fluorides are blended with rare earth magnet powders to produce high-resistivity fluoride composite rare earth magnets.

主权项

1. A rare earth-transition metal-boron (RE-TM-B) permanent magnet having the formula:
RE11.7+xTM88.3−x−yBy where RE is selected from the group consisting of rare earth elements, Nd, Pr, Dy, and Tb; where TM is selected from the group consisting of transition metal elements Fe, Co, Cu, Ga, and Al; and where x is 0 to 5 and y is 5 to 7; further comprising one or more homogeneously blended dielectric resistivity-increasing agents materials in the magnet composition, wherein the resistivity-increasing agent is selected from the group consisting of Ca(F,O)x; (RE,Ca)Fx; (RE,Ca)(F,O)x; REFx, RE(F,O)x and mixtures thereof, where x is 0 to 5, and RE is selected from the group consisting of the rare earth elements, Nd, Pr, Dy, and Tb.