公开(公告)号：US11987868B2

公开(公告)日：2024-05-21

申请号：US17090703

申请日：2020-11-05

Applicant: GRIREM ADVANCED MATERIALS CO., LTD. ,  GRIREM HI-TECH CO., LTD.

Inventor： Yang Luo ,  Zilong Wang ,  Yuanfei Yang ,  Zhou Hu ,  Dunbo Yu ,  Jiajun Xie ,  Yifan Liao ,  Zhongkai Wang

IPC: B22F1/142 ,  B22F9/04 ,  C22C1/10 ,  C22C38/00 ,  H01F1/057

CPC classification number: C22C38/005 ,  B22F1/142 ,  B22F9/04 ,  C22C1/1084 ,  H01F1/0576 ,  B22F2009/041 ,  B22F2201/013 ,  B22F2201/20 ,  B22F2301/355 ,  C22C2202/02

Abstract: A method for preparing a rare earth anisotropic bonded magnetic powder, comprises the following steps: (1) preparing raw powder with RTBH as the main component, wherein, R is Nd or Pr/Nd, and T is a transition metal containing Fe; (2) adding La hydride or Ce hydride and copper powder to the raw powder to form a mixture; (3) subjecting the mixture to atmosphere diffusion heat treatment to give the rare earth anisotropic bonded magnetic powder.

公开(公告)号：US11505852B2

公开(公告)日：2022-11-22

申请号：US16791088

申请日：2020-02-14

Applicant: GRIREM ADVANCED MATERIALS CO., LTD.

Inventor： Yang Luo ,  Xiao Lin ,  Guiyong Wu ,  Jiajun Xie ,  Zilong Wang ,  Wenlong Yan ,  Zhongkai Wang ,  Dunbo Yu

IPC: C22C38/00 ,  H01F1/059 ,  H01F41/02 ,  B22F9/04 ,  B22F1/00

Abstract: The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

公开(公告)号：US20210134499A1

公开(公告)日：2021-05-06

申请号：US17090710

申请日：2020-11-05

Applicant: GRIREM ADVANCED MATERIALS CO., LTD. ,  GRIREM HI-TECH CO., LTD.

Inventor： Yang Luo ,  Zhongkai Wang ,  Yuanfei Yang ,  Zilong Wang ,  Dunbo Yu ,  Yifan Liao ,  Jiajun Xie ,  Zhou Hu

IPC: H01F1/057 ,  H01F1/059 ,  H01F41/02 ,  B22F1/00

Abstract: The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.

公开(公告)号：US11981983B2

公开(公告)日：2024-05-14

申请号：US17090710

申请日：2020-11-05

Applicant: GRIREM ADVANCED MATERIALS CO., LTD. ,  GRIREM HI-TECH CO., LTD.

Inventor： Yang Luo ,  Zhongkai Wang ,  Yuanfei Yang ,  Zilong Wang ,  Dunbo Yu ,  Yifan Liao ,  Jiajun Xie ,  Zhou Hu

IPC: H01F1/057 ,  B22F1/05 ,  B22F1/065 ,  B22F1/102 ,  C22C33/02 ,  H01F1/059 ,  H01F41/02

CPC classification number: C22C33/0257 ,  B22F1/05 ,  B22F1/065 ,  B22F1/102 ,  H01F1/0578 ,  H01F1/059 ,  H01F41/0266 ,  B22F2301/355 ,  B22F2304/10 ,  B22F2998/10 ,  B22F1/10 ,  B22F3/02 ,  B22F2998/10 ,  B22F1/10 ,  B22F3/20 ,  B22F2998/10 ,  B22F1/10 ,  B22F3/225 ,  B22F2998/10 ,  B22F1/10 ,  B22F3/18

Abstract: The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.

公开(公告)号：US11802326B2

公开(公告)日：2023-10-31

申请号：US17331531

申请日：2021-05-26

Applicant: GRIREM HI-TECH CO., LTD. ,  GRIREM ADVANCED MATERIALS CO., LTD. ,  Grirem (Rongcheng) Co., Ltd.

Inventor： Yang Luo ,  Yuanfei Yang ,  Zilong Wang ,  Dunbo Yu ,  Hongbin Zhang ,  Jiajun Xie ,  Zhou Hu ,  Zhongkai Wang

IPC: C22C38/00 ,  H01F1/057 ,  H01F41/02 ,  B22F7/06 ,  H01F1/055 ,  B22F1/102

CPC classification number: C22C38/002 ,  B22F1/102 ,  B22F7/062 ,  C22C38/005 ,  H01F1/0558 ,  H01F1/0576 ,  H01F1/0578 ,  H01F41/0266 ,  B22F2202/05 ,  B22F2301/355 ,  C22C2202/02 ,  B22F2998/10 ,  B22F1/10 ,  B22F3/02 ,  B22F2003/248

Abstract: An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.

公开(公告)号：US20210130939A1

公开(公告)日：2021-05-06

申请号：US17090699

申请日：2020-11-05

Applicant: GRIREM ADVANCED MATERIALS CO., LTD. ,  GRIREM HI-TECH CO., LTD.

Inventor： Yang Luo ,  Zhongkai Wang ,  Yuanfei Yang ,  Zilong Wang ,  Dunbo Yu ,  Yifan Liao ,  Jiajun Xie ,  Zhou Hu

IPC: C22C38/16 ,  H01F1/057 ,  H01F41/02 ,  C22C38/06 ,  C22C38/00 ,  C22C33/02 ,  B22F9/04 ,  B22F1/00

Abstract: The invention discloses an anisotropic bonded magnetic powder and a preparation method thereof. The anisotropic bonded magnetic powder has a general formula of R1R2TB, wherein R1 is a rare earth element containing Nd or PrNd, R2 is one or two of La and Ce, T is a transitional element, and B is boron. The preparation method includes the steps of smelting the master alloy to prepare ingot(s), preparing a rare earth hydride of formula R1TBHX, preparing a hydride diffusion source of formula R1R2THX, mixing, heat treating, and high-vacuum dehydrogenating, to obtain the anisotropic bonded magnetic powder. The invention uses La and Ce hydrides as the diffusion source, can save cost, remove hydrogen from the diffusion source at a lower dehydrogenation temperature, avoid crystal grain growth at a high temperature, and ensure the quality of the product.