Title:
R-Fe-B系永久磁石
Document Type and Number:
Japanese Patent JP5501824
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an R-Fe-B based permanent magnet having high coercive force.SOLUTION: An organic compound solution doped with an organic metal compound represented by Si-(OR)(wherein R is any one of 2-6C alkyl groups and may be a straight chain or a branched chain, and x is any integer) is added to a fine powder of a pulverized R-Fe-B magnet, and the organic metal compound is uniformly deposited to the surface of the magnetic particles. After that, a molded body formed by powder compaction is kept for several hours at 200-900°C standing in a hydrogen atmosphere to executed temporary baking process in hydrogen. Then, the molded body is baked at 800-1,180°C, thereby a permanent magnet 1 of structure containing R(Fe, (Co), Si)B main phase and an R-Fe(Co)-Si grain boundary phase and that does not contain a B-rich phase is manufactured.
More Like This:
| JPH07197102 | RARE EARTH ALLOY POWDER AND ITS BONDED MAGNET |
| JPH04257203 | PLASTIC MAGNET COMPOSITE |
| JP3860443 | MAGNET POWDER AND BOND MAGNET |
Inventors:
Ozeki Idemitsu
Kume Katsuya
Keisuke Hirano
Tomohiro Omure
Taisuke Keisuke
Kume Katsuya
Keisuke Hirano
Tomohiro Omure
Taisuke Keisuke
Application Number:
JP2010083187A
Publication Date:
May 28, 2014
Filing Date:
March 31, 2010
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
H01F1/08; B22F1/00; B22F1/02; B22F3/00; C22C33/02; C22C38/00; H01F1/057; H01F41/02
Domestic Patent References:
| JP2004165482A | ||||
| JP2009259956A | ||||
| JP2005286315A | ||||
| JP6069009A | ||||
| JP8111306A | ||||
| JP2001176711A | ||||
| JP2000232026A |
Attorney, Agent or Firm:
Patent business corporation NEXT