Title:
希土類コバルト永久磁石及びその製造方法、並びにデバイス
Document Type and Number:
Japanese Patent JP7117359
Kind Code:
B2
Abstract:
To provide a rare-earth cobalt permanent magnet of excellent magnetic property.SOLUTION: A rare-earth cobalt permanent magnet is an intermetallic compound including rare-earth cobalt which has R:23 to 27% (R is a sum of rare-earth elements including at least Sm), Cu:4.0 to 5.0%, Fe:22 to 27%, Zr:1.7% to 2.5% in mass percentage composition and has a remaining part composed of Co and inevitable impurities. It has a plurality of crystal grains and grain boundaries and the maximum diameter of its pore is 40 μm or less.SELECTED DRAWING: Figure 1
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Inventors:
Hiroaki Machida
Teruhiko Fujiwara
Hirokazu Makuda
Teruhiko Fujiwara
Hirokazu Makuda
Application Number:
JP2020191730A
Publication Date:
August 12, 2022
Filing Date:
November 18, 2020
Export Citation:
Assignee:
Tokin Co., Ltd.
International Classes:
H01F1/055; B22F1/00; B22F3/00; B22F3/24; B22F9/04; C22C1/00; C22C1/04; C22C19/07; H01F41/02
Domestic Patent References:
| JP2018047211A1 | ||||
| JP8022909A | ||||
| JP4157101A | ||||
| JP2018170483A |
Foreign References:
| WO2017061126A1 |
Attorney, Agent or Firm:
Ken Ieiri
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