Title:
MAGNET POWDER AND BOND MAGNET
Document Type and Number:
Japanese Patent JP3860443
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a magnet powder and a bond magnet which enable to provide a magnet having superior magnetic characteristics and a stable performance.
SOLUTION: The bond magnet is made of a composite structure comprising hard magnetism phase and soft magnetism phase, and is made by bonding the magnet powder having a plurality of projecting streak or grooves on at least a part of the surface with bonding resin. A rate of increase in weight per unit surface area expressed by (ΔWb/W1b)×100/S is 0.2 [wt.%/cm2] or lower, where the weight of the bond magnet before held in a 60°C×95 RH% atmosphere for 1000 hours in a state applied with no coating layer on the outer surface is W1b [g], the weight after held in the atmosphere and then dried is W2b [g], an increase in weight before and after held in the atmosphere is ΔWb=W2b-W1b [g], and the entire outer surface area of the bond magnet is S [cm2].
Inventors:
Hiroshi Kato
Sei Arai
Sei Arai
Application Number:
JP2001251934A
Publication Date:
December 20, 2006
Filing Date:
August 22, 2001
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
B22D11/06; H01F1/08; B22F1/00; B22F3/00; B22F9/08; C22C38/00; H01F41/02; (IPC1-7): H01F1/08; B22D11/06; B22F1/00; H01F41/02; //B22F3/00; B22F9/08; C22C38/00
Domestic Patent References:
| JP5269549A | ||||
| JP8215801A | ||||
| JP200135712A |
Attorney, Agent or Firm:
Tatsuya Masuda
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