H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 1/06 (2006.01) B22F 1/00 (2006.01) B22F 1/02 (2006.01) H01F 1/057 (2006.01) H01F 1/08 (2006.01) H01F 41/02 (2006.01)
Patent
CA 2132760
ABSTRACT The present invention aims at providing a powdery raw material composition for a permanent magnet superior in the magnetic properties and easy in preparation, a magnetically anisotropic permanent magnet, and a method for producing the magnet by use of the powdery raw material composition. A powdery raw material composition for a permanent magnet according to the present invention is one prepared by subjecting a mixture composed of 13-18 weight% of a neodymium powder, 4-10 weiqht% of a boron powder and the rest of an acicular iron powder coated with aluminum phosphate to a temperature above 600°C in an atmosphere initially of a hydrogen-containing reducing gas followed later by an inert gas, and a magnetically anisotropic permanent magnet is prepared by compression molding a mixture obtained from the powdery composition and a binder under heating in the presence of a magnetic field.
Mccarthy Tetrault Llp
Takahashi Yasunori
LandOfFree
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