Title:
永久磁石及び永久磁石の製造方法
Document Type and Number:
Japanese Patent JP4923149
Kind Code:
B2
Abstract:
There are provided a permanent magnet and a manufacturing method thereof capable of preventing grain growth in a main phase and enabling rare-earth rich phase to be uniformly dispersed. To fine powder of milled neodymium magnet material is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M- (OR) x (in the formula, M represents Cu or Al, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body formed by compacting the above neodymium magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius. Thereafter, through a sintering process, a permanent magnet is manufactured.
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Inventors:
Ozeki Idemitsu
Kume Katsuya
Keisuke Hirano
Tomohiro Omure
Taisuke Keisuke
Takashi Ozaki
Kume Katsuya
Keisuke Hirano
Tomohiro Omure
Taisuke Keisuke
Takashi Ozaki
Application Number:
JP2011069065A
Publication Date:
April 25, 2012
Filing Date:
March 28, 2011
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
H01F1/08; B22F1/00; B22F3/00; B22F9/04; C22C38/00; H01F1/053; H01F41/02
Domestic Patent References:
| JP64068903A | ||||
| JP1247502A | ||||
| JP5271708A |
Attorney, Agent or Firm:
Patent business corporation NEXT