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    Residuum rare earth magnet
    1.
    发明授权
    Residuum rare earth magnet 失效
    稀土稀土磁铁

    公开(公告)号：US06377049B1

    公开(公告)日：2002-04-23

    申请号：US09248950

    申请日：1999-02-12

    申请人： Mark Gilbert Benz ,  Juliana Ching Shei

    发明人： Mark Gilbert Benz ,  Juliana Ching Shei

    IPC分类号： G01V300

    CPC分类号： C22B59/00 ,  G01R33/20 ,  G01R33/383 ,  H01F1/053 ,  H01F1/057 ,  Y10T29/4902

    摘要： A permanent magnet for an MRI scanner is made by removing extraneous elements from an ore containing rare earth elements to leave elements Pr and Nd therein, and then selectively stripping therefrom a portion of the element Nd as a byproduct to leave an ore residuum including both elements Pr and Nd therein. The residuum is alloyed with a transition metal to form an alloy therewith. The alloy is then formed into a rare earth permanent magnet configured for use in the MRI scanner.

    摘要翻译： 通过从含有稀土元素的矿石去除外来元素以在其中留下元素Pr和Nd，然后选择性地从其中除去作为副产物的元素Nd的一部分以留下包括两种元素的矿石残渣，从而制造用于MRI扫描仪的永磁体 Pr和Nd。 残渣与过渡金属合金化，形成合金。 然后将合金形成为用于MRI扫描仪中的稀土永磁体。

    Praseodymium-rich iron-boron-rare earth composition, permanent magnet produced therefrom, and method of making
    2.
    发明授权
    Praseodymium-rich iron-boron-rare earth composition, permanent magnet produced therefrom, and method of making 有权
    富镨铁硼稀土组合物，由其制造的永久磁铁及其制造方法

    公开(公告)号：US6120620A

    公开(公告)日：2000-09-19

    申请号：US248951

    申请日：1999-02-12

    申请人： Mark Gilbert Benz ,  Juliana Ching Shei

    发明人： Mark Gilbert Benz ,  Juliana Ching Shei

    IPC分类号： C22C1/04 ,  H01F1/057 ,  H01F1/053

    CPC分类号： C22C1/0441 ,  H01F1/0577

    摘要： A permanent magnet having substantially stable magnetic properties is disclosed having as the active magnetic component a sintered product of compacted particulate iron-boron-rare earth intermetallic material, said sintered product having pores which are substantially non-interconnecting, a density of at least 87 percent of theoretical and a composition consisting essentially of in atomic percent about 13 to about 19 percent rare earth elements, about 4 to about 20 percent boron and about 61 to about 83 percent of iron with or without impurities; where the rare earth content is greater than 50 percent praseodymium with an effective amount of a light rare earth selected from the group consisting of cerium, lanthanum, yttrium and mixtures thereof, and balance neodymium.

    摘要翻译： 公开了一种具有基本上稳定的磁特性的永磁体，其具有作为活性磁性组分的致密颗粒铁 - 硼 - 稀土金属间化合物的烧结产品，所述烧结产品具有基本上非互连的孔，至少87％的密度 的理论和基本上由原子百分比组成的约13至约19％的稀土元素，约4至约20％的硼和约61％至约83％的具有或不含杂质的铁的组合物; 其中稀土含量大于50％的镨，有效量的选自铈，镧，钇及其混合物的轻稀土，余量为钕。