Title:
焼結磁石の製造方法
Document Type and Number:
Japanese Patent JP4179973
Kind Code:
B2
Abstract:
The present invention provides a method for producing a sintered magnet, which can have a sufficient sintered density even when the magnet has a low-R composition. The method is for producing a sintered magnet comprising R (R: one or more rare-earth elements), T (T: one or more transition metal elements essentially comprising Fe, or Fe and Co) and B (boron) as the main components, wherein a starting alloy prepared by strip casting is pulverized to a given particle size to form a fine powder, where the starting alloy comprises discolored deposit 1 on the surface and the area ratio of the discolored deposit 1 is 1.5% or less, the resulting fine powder is compacted in a magnetic field to prepare a compact, and the compact is sintered.
Inventors:
Hidaka High Tetsuya
Riki Ishizaka
Riki Ishizaka
Application Number:
JP2003387672A
Publication Date:
November 12, 2008
Filing Date:
November 18, 2003
Export Citation:
Assignee:
tdk Corporation
International Classes:
B22F3/00; H01F1/08; B22F3/16; C22C1/04; H01F1/053; H01F1/057; H01F41/02
Domestic Patent References:
| JP1150110A | ||||
| JP2002329604A | ||||
| JP3130310A |
Attorney, Agent or Firm:
Mitsuru Oba