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Being the rare earth - succession metal - nitrogen magnet powder where the cohesion

机译：被稀土-继承金属-氮磁粉凝聚的地方

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摘要

PPROBLEM TO BE SOLVED: To provide rare-earth/transition-metal/nitrogen-based magnet powder in which the degree of agglomeration is lowered and magnetic properties are improved by regulating the particle size distribution of the magnetic powder to a specific pattern and to provide a method for efficiently manufacturing the magnet powder by carrying out grinding by using specific equipment/conditions. PSOLUTION: The rare-earth/transition-metal/nitrogen-based magnet powder has a particle size distribution of 1 to 5 μm average particle size (D50) and ≤5μm particle size (D50-D70) width and also has ≤4 degree of agglomeration (X). The coarse powder of rare-earth/transition-metal/nitrogen-based magnet having 5 μm average particle size is introduced into a grinding machine which is either of a medium-stirring mill and a bead mill, and rotated together with a grinding medium, such as metal balls or ceramic balls, in the grinding machine. Balls of 0.1 to 1 mm ball diameter are used as the grinding medium and the rotational circumferential speed of the grinding machine is made to 10 to 20 m/s to pulverize the coarse powder of the rare-earth/transition-metal/nitrogen-based magnet. By this method, the rare-earth/transition-metal/nitrogen-based magnet powder can be manufactured. PCOPYRIGHT: (C)2004,JPO

机译：

要解决的问题：提供一种稀土/过渡金属/氮基磁体粉末，其中通过将磁粉的粒度分布调节为特定的图案，可以降低团聚度并改善磁性能并且提供一种通过使用特定设备/条件进行研磨来有效地制造磁体粉末的方法。

解决方案：稀土/过渡金属/氮基磁铁粉末的粒径分布为1至5μm平均粒径（D50）和5μm粒径（D50-D70）宽度，并且结块度为（x）4。将具有大于5μm的平均粒径的稀土/过渡金属/氮基磁体的粗粉引入到研磨机中，该研磨机是中速搅拌机和珠磨机中的任一个，并且与研磨机中的研磨介质，例如金属球或陶瓷球。将球直径为0.1至1 mm的球用作研磨介质，并将研磨机的旋转圆周速度设为10至20 m / s，以粉碎稀土/过渡金属/氮基粗粉磁铁。通过这种方法，可以制造稀土/过渡金属/氮基磁体粉末。

版权：（C）2004，日本特许厅展开▼

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公开/公告号JP4063005B2

专利类型
公开/公告日2008-03-19

原文格式PDF
申请/专利权人住友金属鉱山株式会社;
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申请/专利号JP20020222486
发明设计人横沢公一;川本淳;
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申请日2002-07-31
分类号B22F1/00;B22F9/04;C22C38/00;H01F1/06;
国家 JP
入库时间 2022-08-21 20:18:56

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