| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thin curved magnet which has high dimensional accuracy, high density and a thickness less than 1 mm and which can generate a strong magnetic field at an air gap between the armature and field of, e. g. a small- sized DC motor. SOLUTION: This compact magnet is manufactured by a method comprising the steps of (1) forming a rare earth-iron containing qnenched and solidified thin strip, whose size is 150μm or less after being roughly pulverized as necessary, into a granular compound whose size is 250μm or less using a binder, (2) dry-mixing the granular compound with fatty acid metallic soap powder, (3) forming a green compact from the granular compound dry-mixed with the fatty acid metallic soap powder, by powder molding, and (4) heat-treating the pressed powder to a temperature for thermally dissociating an isocyanate regenerated body. |
