Title:
RARE EARTH BOND MAGNET, AND MAGNETIC POWDER AND COMPOSITION THEREFOR
Document Type and Number:
Japanese Patent JP3473677
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a magnetic powder for a rare earth bond magnet wherein, excellent in heat-resistance, the heating temperature where an initial demagnetizing factor is 5% is 80°C or above, and also provide a composition for the rare earth bond magnet as well as the rare earth bond magnet.
SOLUTION: Related to a magnetic powder for a rare earth bond magnet whose main components are R (R is rare earth element), Fe or both Fe and Co, and N, a content of total magnetic powder of particle size 5.0 μm or larger relative to that of particle size 1.0 μm or larger is 2.5% or less by unit base. The composition for the rare earth bond magnet contains the magnetic powder for rare earth bond magnet and a resin binder as main components, and the rare earth bond magnet is obtained by molding the composition for rare earth bond magnet into a magnet shape.
Inventors:
Hisashi Ishikawa
Kazutoshi Ishizaka
Shinichi Hayashi
Kazutoshi Ishizaka
Shinichi Hayashi
Application Number:
JP19376298A
Publication Date:
December 08, 2003
Filing Date:
June 24, 1998
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
B22F1/00; C22C38/00; H01F1/053; H01F1/059; H01F1/06; H01F1/08; (IPC1-7): H01F1/06; B22F1/00; C22C38/00; H01F1/053; H01F1/08
Domestic Patent References:
| JP5308012A | ||||
| JP5226132A | ||||
| JP1041116A | ||||
| JP997732A | ||||
| JP7302725A | ||||
| JP5339683A |
Attorney, Agent or Firm:
Shozo Ueda