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    Process of producing calcined materials for ferrite magnet
    2.
    发明授权
    Process of producing calcined materials for ferrite magnet 失效
    生产铁氧体磁铁煅烧材料的工艺

    公开(公告)号：US5387356A

    公开(公告)日：1995-02-07

    申请号：US219999

    申请日：1994-03-30

    申请人： Atsushi Hamamura

    发明人： Atsushi Hamamura

    IPC分类号： C01G49/00 ,  C04B35/26 ,  C04B35/64 ,  H01F1/11

    CPC分类号： C04B35/64 ,  C04B35/2683

    摘要： It is an object of the present invention to provide a process of producing calcined materials for ferrite magnet, whereby foreign phase produced in calcined powders is eliminated and the ferrite magnet having a superior magnetic properties is obtained easily. Since mill scales roughly milled into a mean particle size of 20 .mu.m or less is subjected to primary oxidation treatment to change its oxidation percentage 95% or higher, and oxidized completely by secondary oxidation treatment in an inclined rotary kiln up to 700.degree. C. in an atmosphere containing O.sub.2 content of 8% to 10% at a charging side of raw material, foreign phase is not produced in the calcined powders during ferrite formation at high temperatures, and the ferrite magnet having a superior magnetic properties can be obtained.

    摘要翻译： 本发明的目的是提供一种生产用于铁氧体磁体的煅烧材料的方法，由此消除了在煅烧粉末中产生的异相，并且容易获得具有优异磁性的铁氧体磁体。 由于大约碾磨成20μm以下的平均粒径的磨粒进行一次氧化处理，以使其氧化百分比变为95％以上，并且在高达700℃的倾斜回转窑中通过二次氧化处理完全氧化。 在原料充电侧的含氧量为8％〜10％的气氛中，在高温铁素体形成时在煅烧粉末中不会产生异相，可以得到磁特性优异的铁氧体磁铁。

    Powder material for rare earth-iron-boron based permanent magnets
    3.
    发明授权
    Powder material for rare earth-iron-boron based permanent magnets 失效
    稀土 - 铁硼永磁体用粉末材料

    公开(公告)号：US5281250A

    公开(公告)日：1994-01-25

    申请号：US838092

    申请日：1992-02-20

    申请人： Atsushi Hamamura ,  Katsumi Okayama ,  Yuji Kaneko ,  Yasuhiro Okajima ,  Kaname Takeya ,  Shuji Okada

    发明人： Atsushi Hamamura ,  Katsumi Okayama ,  Yuji Kaneko ,  Yasuhiro Okajima ,  Kaname Takeya ,  Shuji Okada

    IPC分类号： B22F1/00 ,  C22C38/00 ,  H01F1/057 ,  H01F1/06

    CPC分类号： H01F1/0573 ,  H01F1/0571

    摘要： A powder for producing permanent magnets, comprising a blend of powders [A] and [B] or [C] wherein:alloy powder [A] has an R.sub.2 Fe.sub.14 B phase and contains, in atomic percent, from 11 to 13% of at least one rare element, R, inclusive of Y, from 4 to 12% of B, and the balance Fe; or optionally, said powder has an R.sub.2 (Fe,Co).sub.14 B phase, an R.sub.2 (Fe,Ni).sub.14 B phase or an R.sub.2 (Fe,Co,Ni).sub.14 B phase, containing at least one selected from the group consisting of 10% or less of Co and 3% or less of Ni as a partially substitute for Fe;powder [B] is an intermetallic compound having an intermetallic compound phase of R with Fe or Co inclusive of an R.sub.3 Co phase (provided that Co may be partially substituted for by Fe), containing, in atomic percent, from 13 to 45% of at least one rare element, R, inclusive of Y, and the balance Co (provided that Co may be partially substituted for by Fe),powder [C] is an intermetallic compound having an intermetallic compound phase of R with Fe or Co inclusive of an R.sub.3 Co phase (provided that Co may be partially substituted for by Fe) and an R.sub.2 Fe.sub.14 B phase, containing, in atomic percent, from 13 to 45% of at least one rare element, R, inclusive of Y, 12% or less of B and the Co (provided that Co may be partially substituted for by Fe).

    摘要翻译： 一种用于制造永磁体的粉末，其包含粉末（A）和（B）或（C）的混合物，其中：合金粉末（A）具有R2Fe14B相，原子百分比含有11至13％的至少一种 稀有元素R，包括Y，B的4〜12％，余量为Fe; 或任选地，所述粉末具有R2（Fe，Co）14B相，R2（Fe，Ni）14B相或R2（Fe，Co，Ni）14B相，其含有选自10％ 以下的Co和3％以下的Ni作为Fe的部分替代物; 粉末（B）是具有与Fe或Co的金属间化合物相的金属间化合物，包括R3Co相（其中Co可以部分被Fe取代），原子百分比含有13〜45％的 至少一种稀有元素R（包括Y）和余量Co（条件是Co可以部分被Fe取代），粉末（C）是金属间化合物的金属间化合物，其中R与Fe或Co包括 R3Co相（其中Co可以被Fe部分取代）和R2Fe14B相，其中原子百分比含有13至45％的至少一种稀有元素R，包括Y，12％或更少的B和 Co（Co可以部分地被Fe代替）。