Title:
炭素鋳型作製方法、永久磁石粒子作製方法、ボンド永久磁石用造粒粉作製方法およびボンド永久磁石の製造方法
Document Type and Number:
Japanese Patent JP4628869
Kind Code:
B2
Abstract:
To obtain permanent magnet particles of nano-order, whose magnetic characteristics are improved compared with a permanent magnet using conventional permanent magnet particles of micron-order, and to provide a producing method for a permanent magnet to be formed by granulating the permanent magnet particles of nano-order.
A carbon mold is manufactured by adding water, hydrazine, NH3, and TEOS to a C-15/cyclohexane solution to form spherical silica, firing the spherical silica under an Ar atmosphere, and etching the spherical silica with NaOHaq. The manufactured carbon mold is vacuum-impregnated with an aqueous solution of metallic salt, and an aqueous solution of Ca(NO3) is added to the carbon mold. By this reduction diffusion treatment, permanent magnet particles are manufactured. Further, the permanent magnet particles are treated in such a procedure as to be granulated, mixed with resin, and molded, whereby the permanent magnet is produced.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
Masahiro Kishida
Takaaki Yasumura
Iwao Sasaki
Satoshi Hamao
Application Number:
JP2005154607A
Publication Date:
February 09, 2011
Filing Date:
May 26, 2005
Assignee:
Kyushu University
Yaskawa Electric Co., Ltd.
International Classes:
B22C1/00; B22F3/00; B22F9/24; H01F1/053; H01F1/08; H01F41/02
Domestic Patent References:
| JP2003253249A | | | | |
| JP7074012A | | | | |
| JP2002060806A | | | | |
| JP2004161590A | | | | |
Attorney, Agent or Firm:
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Yuriko Hamada
