Title:
希土類永久磁石の製造方法
Document Type and Number:
Japanese Patent JP4662009
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enjoy effect such as improvement in the degree of orientation due to the addition of lubricant, and at the same time to reduce the wear-and- tear of grinding equipment. SOLUTION: As shown in Fig. 1 (a), after the starting raw material of an R-T-B (R = at least one or two kinds of a rare earth element containing Y, T = at least one or two kinds of transition metal elements, and B= boron)- based rare earth permanent magnet is ground coarsely, lubricant is added. Then, coarse powder where the lubricant is added is ground finely, and a solvent is added to the fine powder. In the solvent, the lubricant should be dissolved. Then, after the fine powder where the solvent is added is formed for obtaining a forming body, the forming body is sintered, thus enjoying effect such as improvement in the degree of orientation due to the addition of the lubricant, and at the same time reducing the wear-and-tear of grinding equipment.
More Like This:
Inventors:
Eiji Kato
Riki Ishizaka
Riki Ishizaka
Application Number:
JP2001255890A
Publication Date:
March 30, 2011
Filing Date:
August 27, 2001
Export Citation:
Assignee:
tdk Corporation
International Classes:
B02C21/00; H01F41/02; B22F1/02; B22F3/00; B22F3/02; B22F9/04; C22C33/02; H01F1/057
Domestic Patent References:
| JP10321451A | ||||
| JP5094922A | ||||
| JP3172521B2 | ||||
| JP2001143950A |
Attorney, Agent or Firm:
Mitsuru Oba