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    • 7. 发明公开
    • 희토류 영구자석 재료의 제조 방법
    • 制备稀土永磁材料的方法
    • KR1020080110450A
    • 2008-12-18
    • KR1020077021606
    • 2007-03-28
    • 신에쓰 가가꾸 고교 가부시끼가이샤
    • 나카무라,하지메미노와,다케히사히로타,고이치
    • H01F1/053H01F1/08H01F41/02B22F3/24
    • C23C10/30B22F3/24B22F2003/241B22F2003/242B22F2003/247B22F2003/248C21D6/00C22C38/005C22C2202/02C23C10/28C23C10/52C23C24/08H01F1/0577H01F41/0293
    • Disclosed is a method for producing a rare earth permanent magnet material which is characterized in that a sintered magnet body and a mixed powder are subjected to a heat treatment in vacuum or in an inert gas at a temperature not higher than the sintering temperature of the sintered body, while having the mixed powder present on the surface of the sintered magnet body, so that at least one of M and R2 contained in the mixed powder is absorbed into the magnet body. The sintered magnet body has an R1-Fe-B composition (wherein R1 represents one or more elements selected from rare earth elements including Sc and Y), and the mixed powder is composed of a powder containing not less than 0.5% by mass of M (M represents one or more elements selected from Al, Cu and Zn) and having an average particle diameter of not more than 300 mum, and another powder containing not less than 30% by mass of a fluoride of R2 (R2 represents one or more elements selected from rare earth elements including Sc and Y) and having an average particle diameter of not more than 100 mum. This method enables to obtain a high-performance R-Fe-B sintered magnet wherein only a few Tb or Dy is used. ® KIPO & WIPO 2009
    • 公开了一种稀土永磁材料的制造方法,其特征在于,在不高于烧结体的烧结温度的温度下,将真空中或惰性气体中的烧结磁体和混合粉末进行热处理 同时在烧结磁体的表面上存在混合粉末,使得混合粉末中所含的M和R2中的至少一个被吸收到磁体中。 烧结磁体具有R1-Fe-B组成(其中R1表示选自包括Sc和Y的稀土元素中的一种或多种元素),并且该混合粉末由含有不小于0.5质量%的M (M表示选自Al,Cu和Zn的一种或多种元素),平均粒径不大于300μm,另外含有不少于30质量%的R2的氟化物的粉末(R2表示一个或多个 选自包括Sc和Y的稀土元素的元素)并且具有不大于100μm的平均粒径。 该方法能够获得仅使用少量Tb或Dy的高性能R-Fe-B烧结磁体。 ®KIPO&WIPO 2009
    • 8. 发明公开
    • 희토류 영구자석 재료의 제조 방법
    • 制备稀土永磁材料的方法
    • KR1020080110449A
    • 2008-12-18
    • KR1020077021604
    • 2007-03-28
    • 신에쓰 가가꾸 고교 가부시끼가이샤
    • 나카무라,하지메미노와,다케히사히로타,고이치
    • H01F1/053H01F1/08H01F41/02B22F3/24
    • B22F7/02C21D6/00C22C38/005H01F1/0577H01F41/0293
    • A process for producing a rare-earth permanent magnet material which comprises: repeatedly subjecting a sintered magnetic object having the composition R1aTbAcMd (wherein R1 is any of the rare earth elements including Sc and Y; T is Fe and/or Co; A is B (boron) and/or C (carbon); and M is Al, Cu, Zn, In, Si, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W) and a powder comprising the oxide of R2, the fluoride of R3, and the oxofluoride of R4 (R2, R3, and R4 each is any of the rare earth elements including Sc and Y) and having an average particle diameter of 100 mum or smaller to a heat treatment two or more times at a temperature not higher than the sintering temperature of the magnetic object while keeping the powder present on the surface of the sintered magnetic object to thereby cause the R2, R3, and R4 contained in the powder to be absorbed in the magnetic object. By the process, a rare-earth permanent magnet material for use as an R-Fe-B sintered magnet can be produced which has high performances and is reduced in the content of Tb or Dy. ® KIPO & WIPO 2009
    • 1.一种稀土类永久磁铁材料的制造方法,其特征在于:对具有组成R1aTbAcMd的烧结磁性体(其中,R 1为包含Sc和Y的稀土元素,T为Fe和/或Co; A为B (硼)和/或C(碳); M是Al,Cu,Zn,In,Si,P,S,Ti,V,Cr,Mn,Ni,Ga,Ge,Zr,Nb,Mo, Ag,Cd,Sn,Sb,Hf,Ta或W)和包含R 2的氧化物,R 3的氟化物和R 4(R 2,R 3和R 4)的氧氟化物的粉末包括任何稀土元素,包括 Sc和Y),并且在不高于磁性物体的烧结温度的温度下进行两次或更多次的平均粒径为100μm以下的热处理,同时将存在于烧结磁性体的表面上的粉末保持在 从而使包含在粉末中的R2,R3和R4被吸收在磁性物体中。 通过该方法,可以制造用作R-Fe-B烧结磁体的稀土永磁材料,其具有高性能并降低Tb或Dy的含量。 ®KIPO&WIPO 2009