Title:
SmCo-BASED RARE EARTH SINTERED MAGNET
Document Type and Number:
WIPO Patent Application WO/2015/159882
Kind Code:
A1
Abstract:
[Problem] To provide a SmCo-based rare earth sintered magnet which has small diameters and a multipolar-magnetized magnet structure and also has both a high coercive force and a high magnetization rate. [Solution] The outer shape of a SmCo-based rare earth sintered magnet,of which the coercive force (HCJ) (kOe) at room temperature (°C) falls within the range represented by the formula: 7.5(kOe) < HCJ ≤ 27 (kOe), is formed into any one shape of a cylindrical shape, a ring-like shape, a columnar shape and a disk-like shape. Subsequently, the resultant SmCo-based rare earth sintered magnet is subjected to multipolar magnetization in such a manner that the requirement represented by the formula: (outer diameter (D)/number of poles (p)) (mm) < (4/π) (mm) (wherein p represents an even number of 4 or greater) can be satisfied, thereby adjust the magnetization rate to 80 (%) or more.
Inventors:
NAKAMURA MOTOICHI (JP)
SUZUKI SHINGO (JP)
NAKAMURA KAZUYA (JP)
SATO AKIRA (JP)
OKI KOUJI (JP)
ODAGIRI KINYA (JP)
KOGAWA TAKESHI (JP)
KUGO TOMOYUKI (JP)
SUTO AYUMU (JP)
SUZUKI SHINGO (JP)
NAKAMURA KAZUYA (JP)
SATO AKIRA (JP)
OKI KOUJI (JP)
ODAGIRI KINYA (JP)
KOGAWA TAKESHI (JP)
KUGO TOMOYUKI (JP)
SUTO AYUMU (JP)
Application Number:
PCT/JP2015/061468
Publication Date:
October 22, 2015
Filing Date:
April 14, 2015
Export Citation:
Assignee:
NAMIKI PRECISION JEWEL CO LTD (JP)
International Classes:
H01F7/02; H01F1/055; H01F1/08; H02K15/03
Foreign References:
| JPS6398606U | 1988-06-25 | |||
| JP2004128101A | 2004-04-22 | |||
| JPS6399510A | 1988-04-30 | |||
| JP2006203173A | 2006-08-03 | |||
| JPH06178507A | 1994-06-24 | |||
| JPH08340651A | 1996-12-24 |
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