| 摘要 |
<p>There is provided in accordance with the present invention a magnetic encoder (10) including a ring-shaped multipolar magnet (14) having a plurality of opposite magnetic poles alternating with each other in a direction circumferentially thereof, and a core metal (11) for supporting the multipolar magnet (14). The multipolar magnet (14) is prepared from a sintered element that is formed by molding under pressure a powdery mixture of a powdery magnetic material and a binder containing a powdery non-magnetic metallic material to provide a green compact and then sintering the green compact to provide the sintered element. The green compact is molded by the application of a molding force of not lower than 65 tons and the binder has a particle size smaller than 40 µm, The sintered element has a density preferably not smaller than 6.6 g/cm 3 .</p> |
