公开(公告)号：US12020835B2

公开(公告)日：2024-06-25

申请号：US17289973

申请日：2020-10-07

申请人： LG Chem, Ltd.

发明人： Tae Hoon Kim ,  Soon Jae Kwon ,  Ikjin Choi ,  Ingyu Kim ,  Eunjeong Shin ,  Seung Ho Moon ,  Jakyu Chun

IPC分类号： H01F1/057 ,  B22F3/10 ,  B22F3/24 ,  C22C1/05 ,  H01F41/02

CPC分类号： H01F1/0577 ,  B22F3/1003 ,  B22F3/24 ,  C22C1/058 ,  H01F1/0576 ,  H01F41/0266 ,  H01F41/0293 ,  B22F2301/355 ,  B22F2998/10 ,  C22C2202/02

摘要： A method for manufacturing a sintered magnet according to one embodiment of the present disclosure is provided. The method includes producing an R-T-B-based magnetic powder through a reduction-diffusion method, and sintering the R-T-B-based magnetic powder, wherein R is a rare earth element, and T is a transition metal, and wherein the producing the magnetic powder includes adding a refractory metal sulfide powder to a R-T-B-based raw material.

公开(公告)号：US20220238264A1

公开(公告)日：2022-07-28

申请号：US17616518

申请日：2020-07-06

申请人： LG Chem, Ltd.

发明人： Jinhyeok Choe ,  Soon Jae Kwon ,  Hyounsoo Uh ,  Kwang Won Jeon ,  Seung Ho Moon ,  Jakyu Chun

IPC分类号： H01F1/057

摘要： A method for producing a magnet powder is provided in the present disclosure. The method includes synthesizing a R—Fe—B-based magnet powder by a reduction-diffusion process, coating an antioxidant film onto a surface of the R—Fe—B-based magnet powder, and immersing and cleaning the R—F—B-based magnet powder in an aqueous solvent or a non-aqueous solvent, wherein R is Nd, Pr, Dy or Tb, and wherein the antioxidant film includes a compound containing at least one amino group.

公开(公告)号：US20210407712A1

公开(公告)日：2021-12-30

申请号：US17289973

申请日：2020-10-07

申请人： LG Chem, Ltd.

发明人： Tae Hoon Kim ,  Soon Jae Kwon ,  Ikjin Choi ,  Ingyu Kim ,  Eunjeong Shin ,  Seung Ho Moon ,  Jakyu Chun

IPC分类号： H01F1/057 ,  H01F41/02 ,  B22F3/24 ,  B22F3/10 ,  C22C1/05

摘要： A method for manufacturing a sintered magnet according to one embodiment of the present disclosure is provided. The method includes producing an R-T-B-based magnetic powder through a reduction-diffusion method, and sintering the R-T-B-based magnetic powder, wherein R is a rare earth element, and T is a transition metal, and wherein the producing the magnetic powder includes adding a refractory metal sulfide powder to a R-T-B-based raw material.