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发明名称
永久磁铁及永久磁铁的制造方法
摘要
本发明提供永久磁铁之制造方法,该方法不会使Nd-Fe-B系之烧结磁铁表面劣化,可使Dy在结晶粒界相效率良好地扩散而有效地提高磁化及保磁力,且不需要后工程。在处理室20内将Nd-Fe-B系之烧结磁铁S和Dy分开配置。接着,在减压下将处理室20加热,使烧结磁铁升温至既定温度且使Dy蒸发,供给蒸发后的Dy原子附着在烧结磁铁表面。此时,控制对烧结磁铁之Dy原子供给量,在烧结磁铁表面形成Dy层之前,使Dy扩散到烧结磁铁之结晶粒界相且均等地遍布。
申请公布号
TW200822155
申请公布日期
2008.05.16
申请号
TW096131263
申请日期
2007.08.23
申请人
爱发科股份有限公司
发明人
永田浩;新垣良宪
分类号
H01F1/057(2006.01);H01F1/06(2006.01)
主分类号
H01F1/057(2006.01)
代理机构
代理人
林志刚
主权项
地址
日本
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