| 摘要 |
PURPOSE: To develop a technique for stably providing an oxide permanent magnet with high iHc as high Br. CONSTITUTION: In manufacture of an oxide permanent magnet by crushing pre-sintered ferrite powder into fine particles, molding the fine particles within a magnetic field, and then sintering the resulting molding, the temperature rise speed at least in a temperature range of 700-900 deg.C of temperature rise in sintering is set to 0.1-2 deg.C/minute. Subsequently, heating is maintained at a holding temperature above 900 deg.C, or the temperature within the range of 700-900 deg.C of the temperature rise in sintering is maintained at least once or more for one or more hours. Subsequently, heating at a holding temperature above 900 deg.C is maintained. |
