| 摘要 |
To provide a magnet which has both the qualities of high remanence, or retentivity and coercive force, and is resistant to demagnetizing fields, the magnet is made in at least two zones of which the central or segmental zone is made of a magnetic material which has high remanence, whereas the end zone, or zones, is made of a magnetic material having high coercive force. This composite structure can be made by, for example, sequentially squeezing the different materials, in paste form, in a mold and then removing water, pressing, sintering and grinding the resulting structure. |
