公开(公告)号：US20240355515A1

公开(公告)日：2024-10-24

申请号：US18548206

申请日：2022-01-17

Applicant: FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.

Inventor： Weiguo Mou ,  Jiaying Huang

IPC: H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/02 ,  B22F9/04 ,  C21D1/84 ,  C21D6/00 ,  C22C33/04 ,  C22C38/00 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F41/02

CPC classification number: H01F1/0577 ,  B22F3/16 ,  B22F3/24 ,  B22F9/023 ,  B22F9/04 ,  C21D1/84 ,  C21D6/007 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F41/0293 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

Abstract: Disclosed are an R-T-B magnet and a preparation method therefor. The R-T-B magnet comprises the following components: R≥29 wt. %, R being a rare earth element and containing Nd, wherein Nd is ≥22 wt. %; 0.2-0.75 wt. % of Ti+Nb; 0.05-0.45 wt. % of Cu; 0.955-1.15 wt. % of B; and 58-69 wt. % of Fe, wherein wt. % is the ratio of the mass of each component to the total mass of the components; and the mass ratio of Ti to Nb is (1-5):1. According to the present invention, the matching relationship among the added elements in the R-T-B magnet is further optimized, and an R-T-B magnet with better magnetic properties such as relatively high residual magnetization, coercivity, and squareness can be prepared by using the formula.

公开(公告)号：US20240153681A1

公开(公告)日：2024-05-09

申请号：US18411258

申请日：2024-01-12

Applicant: Fujian Golden Dragon Rare-Earth Co., Ltd

Inventor： Weiguo Mou ,  Jiaying Huang ,  Zheng Jiang

IPC: H01F1/057 ,  B22F3/16 ,  B22F3/24 ,  B22F9/02 ,  B22F9/04 ,  C22C33/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  H01F41/02

CPC classification number: H01F1/0577 ,  B22F3/16 ,  B22F3/24 ,  B22F9/023 ,  B22F9/04 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  H01F41/0293 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

Abstract: The invention discloses a neodymium-iron-boron magnet material, a preparation method and use thereof. The neodymium-iron-boron magnet material comprises the following components of: 28-33 wt % of R, wherein R is a rare earth element, and R comprises Pr and 27-31.5 wt % of Nd; 0.30-1.3 wt % of Al; 0.35-0.6 wt % of Cu; ≥0.85 wt % of Co; 0.98-1.2 wt % of B; ≥0.25 wt % of Nb; 62-69 wt % of Fe, wherein wt % is a percentage of the mass of respective component in the total mass of the neodymium-iron-boron magnet material; and the contents of the Nb and the Pr in the neodymium-iron-boron magnet material satisfy the following formula: Nd/Pr≥58. In the present invention, by optimizing the formula of the neodymium-iron-boron magnet material, the coercivity of the neodymium-iron-boron magnet material prepared is improved while maintaining higher levels of remanence and squareness.

公开(公告)号：US12198840B2

公开(公告)日：2025-01-14

申请号：US17600102

申请日：2020-07-22

Applicant: FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.

Inventor： Qin Lan ,  Jiaying Huang ,  Zhixing Xie ,  Weiguo Mou ,  Qingfang Huang

IPC: H01F1/057 ,  B22F3/24 ,  B22F9/04 ,  C22C33/02 ,  C22C38/00 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  H01F41/02

Abstract: A rare earth permanent magnet material and a raw Material composition, a preparation method therefor and use thereof. The rare earth permanent magnet material comprises the following components in percentage by mass: 29.0-32.0 wt. % of R, where R comprises RH, and the content of RH is greater than 1 wt. %; 0.30-0.50 wt. % of Cu (not including 0.50 wt. %); 0.10-1.0 wt. % of Co; 0.05-0.20 wt. % of Ti; 0.92-0.98 wt. % of B; and the remainder being Fe and unavoidable impurities; wherein R is a rare-earth element and at least comprises Nd; and RH is a heavy rare-earth element and at least comprises Tb. The R-T-B system permanent magnet material exhibits excellent performance, wherein Br≥14.30 kGs, and Hcj≥24.1 kOe. The invention can synchronously improve Br and Hcj.