| 摘要 |
PROBLEM TO BE SOLVED: To suppress the oxidation of material even in handling in the open air by finely crushing rare earth permanent magnet material in an inert gas atmosphere, and collecting and keeping it in an oleaginous solvent, and adjusting the mixed slurry into the preset concentration, and removing the oleaginous solvent from the molded item after molding of the slurry, and sintering the molded item. SOLUTION: Rough powder is crushed (1) in are inert gas atmosphere, and the fine powder is collected into an oleaginous solvent without exposing it to the open air. The mixture of the fine powder in a recovery container and the oleaginous solvent is agitated and mixed (3) so that air may not get in, and then it is adjusted to slurry concentration suitable for the supply to the mold of a molding machine (4), and the slurry is supplied to the mold of a molding machine, and while filtration the oleaginous solvent in slurry, orientation of magnetic field is applied to get a molded item (5), and then the solvent in the molded item is removed at a specific temperature in vacuum (6), and the molded item is sintered in vacuum atmosphere to draw out magnetic property (7). Hereby, the oxidation can be suppressed in the manufacture process. |
