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    R-T-B-BASED SINTERED MAGNET
    3.
    发明公开
    R-T-B-BASED SINTERED MAGNET 有权
    GESINTERTER MAGNET AUF R-T-B-BASIS

    公开(公告)号：EP2985768A1

    公开(公告)日：2016-02-17

    申请号：EP14776191.0

    申请日：2014-03-27

    申请人： Hitachi Metals, Ltd.

    发明人： KUNIYOSHI, Futoshi ,  ISHII, Rintaro ,  NISHIUCHI, Takeshi ,  KAWATA, Tsunehiro

    IPC分类号： H01F1/08 ,  C22C38/00 ,  H01F1/057 ,  H01F41/02 ,  B22F9/04 ,  C22C33/02

    摘要： To provide an R-T-B based sintered magnet having high B r and high H cJ without using Dy. Disclosed is an R-T-B based sintered magnet which includes an Nd 2 Fe 14 B type compound as a main phase, and comprises the main phase, a first grain boundary phase located between two main phases, and a second grain boundary phase located between three or more main phases, wherein the composition of the R-T-B based sintered magnet comprises: R: 29.0% by mass or more and 31.5% by mass or less, B: 0.86% by mass or more and 0.4% by mass or less, Ga: 0.4% by mass or more and 0.6% by mass or less, Al: 0.5% by mass or less (including 0% by mass), and balance being T and inevitable impurities.

    摘要翻译： 提供不使用Dy的高B r和高H cJ的R-T-B系烧结磁体。 公开了一种RTB型烧结磁体，其包括Nd 2 Fe 14 B型化合物作为主相，并且包括主相，位于两个主相之间的第一晶界相和位于三相之间的第二晶界相 主相，其中，所述R​​TB系烧结磁体的组成为：R：29.0质量％以上且31.5质量％以下，B：0.86质量％以上且0.4质量％以下，Ga：0.4质量％ 以上且0.6质量％以下，Al：0.5质量％以下（包括0质量％），余量为T和不可避免的杂质。

    R-T-B SYSTEM SINTERED MAGNET
    8.
    发明公开
    R-T-B SYSTEM SINTERED MAGNET 审中-公开
    R-T-B类烧结磁体

    公开(公告)号：EP3038116A1

    公开(公告)日：2016-06-29

    申请号：EP14836459.9

    申请日：2014-08-11

    申请人： Hitachi Metals, Ltd.

    发明人： NISHIUCHI, Takeshi ,  KANDA, Takayuki ,  ISHII, Rintaro ,  KUNIYOSHI, Futoshi ,  SATOH, Teppei

    IPC分类号： H01F1/057 ,  B22F3/00 ,  C22C33/02 ,  C22C38/00 ,  H01F1/08

    摘要： To provide an R-T-B based sintered magnet having high B r and high H cJ while suppressing the content of Dy. Disclosed is an R-T-B based sintered magnet represented by the formula: uRwBxGayCuzAlqM(balance)T, where R is composed of light rare-earth element(s) RL and heavy rare-earth element(s) RH, RL is Nd and/or Pr, RH is Dy and/or Tb, T is Fe, and 10% by mass or less of Fe is capable of being replaced with Co, M is Nb and/or Zr, inevitable impurities being included, and u, w, x, y, z and q are expressed in terms of % by mass; RH accounts for 5% by mass or less of the R-T-B based sintered magnet, 0.4 ≤ x ≤ 1.0, 0.07 ≤ y ≤ 1.0, 0.05 ≤ z ≤ 0.5, 0 ≤ q ≤ 0.1, and 0.100 ≤ y/(x + y) ≤ 0.340; v = u - (6α + 10β + 8γ), where the amount of oxygen (% by mass) is α, the amount of nitrogen (% by mass) is β, and the amount of carbon (% by mass) is γ; and v and w satisfy the following inequality expressions: v ≤ 32.0, 0.84 ≤ w ≤ 0.93, and -12.5w + 38.75 ≤ v ≤ -62.5w + 86.125.

    R-T-B-BASED SINTERED MAGNET
    9.
    发明公开
    R-T-B-BASED SINTERED MAGNET 有权
    基于R-T-B的烧结磁体

    公开(公告)号：EP2980808A1

    公开(公告)日：2016-02-03

    申请号：EP14776462.5

    申请日：2014-03-27

    申请人： Hitachi Metals, Ltd.

    发明人： NISHIUCHI, Takeshi ,  KUNIYOSHI, Futoshi ,  ISHII, Rintaro ,  KAWATA, Tsunehiro

    IPC分类号： H01F1/08 ,  C22C38/00 ,  H01F1/057 ,  H01F41/02

    CPC分类号： H01F1/0557 ,  B22F7/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0577 ,  H01F7/02

    摘要： To provide an R-T-B based sintered magnet having high B r and high H cJ without using Dy by solving a problem that a significant reduction in B r due to a decrease in B concentration and H cJ are insufficient to satisfy recent requirements. Disclosed is an R-T-B based sintered magnet which includes an Nd 2 Fe 14 B type compound as a main phase, and comprises the main phase, a first grain boundary phase located between two main phases, and a second grain boundary phase located between three or more main phases, wherein the first grain boundary phase having a thickness of 5 nm or more and 30 nm or less is present.

    摘要翻译： 本发明提供不使用Dy而具有高Br和高HcJ的R-T-B系烧结磁铁，解决了由于B浓度和HcJ的降低导致的Br的显着减少量不足以满足近期要求的问题。 本发明公开了一种RTB系烧结磁体，其包含Nd 2 Fe 14 B型化合物作为主相，并且包含主相，位于两个主相之间的第一晶界相和位于三个以上主相之间的第二晶界相，其中， 存在具有5nm以上且30nm以下的厚度的第一晶界相。