Title:
磁石粉末の製造方法およびボンド磁石の製造方法
Document Type and Number:
Japanese Patent JP4243413
Kind Code:
B2
Abstract:
The magnetic powder is composed of an alloy composition represented by Rx(Fe1-aCoa)100-x-y-zByMz (where R is at least one kind of rare-earth element excepting Dy, M is at least one kind of element selected from Ti, Cr, Nb, Mo, Hf, W, Mn, Zr and Dy, x is 7.1 - 9.9at% , y is 4.6 - 8.0at%, z is 0.1 - 3.0at%, and a is 0 - 0.30, and the magnetic powder being constituted from a composite structure having a soft magnetic phase and a hard magnetic phase, wherein when the magnetic powder is mixed with a binding resin and then the mixture is subjected to compaction molding to form a bonded magnet having a density rho ÄMg/m<3>Ü, the maximum magnetic energy product (BH)maxÄkJ/m<3>Ü of the bonded magnet at a room temperature satisfies the relationship represented by the formula (BH)max/ rho <2> Äx10<-9>Jm<3>/g<2>Ü ≥ 2.40, and the intrinsic coercive force Hcj of the bonded magnet at a room temperature is in the range of 400 - 750kA/m.
Inventors:
Sei Arai
Hiroshi Kato
Hiroshi Kato
Application Number:
JP2000162552A
Publication Date:
March 25, 2009
Filing Date:
May 31, 2000
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
H01F1/08; C22C38/00; H01F1/053; H01F1/057; H01F41/02
Domestic Patent References:
| JP7054106A | ||||
| JP11283817A | ||||
| JP10261515A | ||||
| JP10317110A |
Attorney, Agent or Firm:
Tatsuya Masuda