公开(公告)号：US20240363270A1

公开(公告)日：2024-10-31

申请号：US18376273

申请日：2023-10-03

Applicant: HYUNDAI MOTOR COMPANY ,  KIA CORPORATION ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS

Inventor： Bo Kyeong Han ,  Sae Mee Yun ,  Kang Mo Koo ,  Yong Ho Choa ,  Byung Kwon Jang

IPC: H01F1/057 ,  B22F1/05 ,  B22F3/02 ,  B22F9/04 ,  B22F9/22 ,  C22C33/02 ,  C22C38/00 ,  H01F41/02

CPC classification number: H01F1/0571 ,  B22F1/05 ,  B22F3/02 ,  B22F9/04 ,  B22F9/22 ,  C22C33/0235 ,  C22C38/005 ,  H01F41/0253 ,  B22F2201/013 ,  B22F2201/10 ,  B22F2301/355 ,  B22F2304/05 ,  B22F2998/10 ,  C22C2202/02

Abstract: A method of preparing a magnet powder, and a magnet powder, are disclosed. The method includes: preparing a neodymium praseodymium (Nd, Pr) mixed oxide containing Nd and Pr; preparing iron (Fe) oxide; preparing boron (B) oxide; mixing the prepared (Nd, Pr) mixed oxide, iron oxide, and boron oxide to prepare a first mixture; mixing the first mixture with calcium (Ca) to prepare a second mixture; inducing diffusion while shaping and pressing the second mixture; reducing the shaped and pressed second mixture to prepare a magnetic substance containing Nd, Fe, and B; powdering the reduced magnetic substance; and removing reduction by-products from the powdered magnetic substance.

公开(公告)号：US20240321489A1

公开(公告)日：2024-09-26

申请号：US18574347

申请日：2022-06-23

Applicant: YANTAI ZHENGHAI MAGNETIC MATERIAL CO., LTD. ,  NANTONG ZHENGHAI MAGNET CO., LTD.

Inventor： Zhaopu XU ,  Dongdong LI ,  Guodong SU ,  Weiwei BU

IPC: H01F1/057 ,  C21D1/18 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  H01F41/02 ,  H02K1/02

CPC classification number: H01F1/0577 ,  C21D1/18 ,  C21D6/007 ,  C21D9/46 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  H01F41/0253 ,  H02K1/02 ,  C22C2202/02

Abstract: An R—Fe—B sintered magnet, and a preparation method therefor and use thereof are provided. The surface of the R—Fe—B sintered magnet has an oxide adhesive layer, and is obtained by means of the heat preservation and heat treatment of an R—Fe—B magnet having a composite diffusion layer on the surface thereof. The heat treatment comprises alternately carrying out a low-temperature heat treatment at 750° C.-830° C. and a high-temperature heat treatment at 830° C.-970° C., and a neodymium iron boron green body having the oxide adhesive layer on the surface thereof is obtained. The grain boundary diffusion of the R—Fe—B magnet is optimized, and the coercive force distribution of the magnet is improved. The R—Fe—B sintered magnet can be used in the field of automobiles, wind power generation, household electric motors, medical apparatuses or mobile communication appliances.

公开(公告)号：US12087481B2

公开(公告)日：2024-09-10

申请号：US18091899

申请日：2022-12-30

Applicant: Baotou Jinshan Magnetic Material Co., Ltd.

Inventor： Feng Xia ,  Yulong Fu ,  Chen Chen ,  Hailong Zheng ,  Zichao Wang ,  Yonghong Liu ,  Caina Sun ,  Yu Wang

IPC: B22F9/02 ,  B22F1/05 ,  B22F3/16 ,  C22C33/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F1/057 ,  H01F41/02 ,  B22F9/04

CPC classification number: H01F1/057 ,  B22F1/05 ,  B22F3/16 ,  B22F9/023 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F41/0253 ,  B22F2009/044 ,  B22F2201/20 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2304/10 ,  B22F2998/10 ,  C22C2202/02

Abstract: Provided are an auxiliary alloy casting piece, a high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereof. The method for preparing the auxiliary alloy casting piece includes the following steps: providing an auxiliary alloy material including, by mass percentage, 40% to 45% of Pr, 1% to 2% of Co, 0.5% to 1% of Ga, 0.6% to 0.8% of B, 0.1% to 0.2% of V, 0.3% to 0.7% of Ti, and a balance of Fe; smelting the auxiliary alloy material to obtain a smelted material; and subjecting the smelted material to a quick-setting casting to obtain the auxiliary alloy casting piece; where the quick-setting casting includes a refining and a casting in sequence.

公开(公告)号：US12080455B2

公开(公告)日：2024-09-03

申请号：US17475944

申请日：2021-09-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Daisuke Ichigozaki ,  Tetsuya Shoji ,  Noritsugu Sakuma ,  Akihito Kinoshita ,  Masaaki Ito

IPC: H01F1/059 ,  C22C38/00 ,  C22C38/10 ,  C23C8/26 ,  H01F41/02

CPC classification number: H01F1/059 ,  C22C38/001 ,  C22C38/005 ,  C22C38/105 ,  C23C8/26 ,  H01F41/0253 ,  C22C2202/02

Abstract: An Sm—Fe—N-based magnetic material according to the present disclosure includes a main phase having a predetermined crystal structure. The main phase has a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh (where, R1 is predetermined rare earth elements and the like, M is predetermined elements and the like, and 0.04≤x+y≤0.50, 0≤z≤0.10, 0≤p+q≤0.10, 0≤s≤0.10, and 2.9≤h≤3.1 are satisfied). A crystal volume of the main phase is 0.833 nm3 to 0.840 nm3. A manufacturing method of the Sm—Fe—N-based magnetic material according to the present disclosure includes nitriding a magnetic material precursor including a crystal phase having a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17.

公开(公告)号：US20240261856A1

公开(公告)日：2024-08-08

申请号：US18616562

申请日：2024-03-26

Applicant: Vacuumschmelze GmbH & Co KG

Inventor： Kaan Üstüner ,  Matthias Katter ,  Christoph Brombacher ,  Daniela Benedikt

IPC: B22F7/08 ,  C22C19/07 ,  H01F1/055 ,  H01F41/02

CPC classification number: B22F7/08 ,  C22C19/07 ,  H01F1/055 ,  H01F41/0253 ,  B22F2201/00 ,  B22F2301/155 ,  C22C2202/02

Abstract: A method is provided for the heat treatment of an object comprising at least one rare-earth element with a high vapor pressure. One or more objects comprising at least one rare-earth element with a high vapor pressure are arranged in an interior of a package. An external source of the at least one rare-earth element is arranged so as to compensate for the evaporation of this same rare-earth element from the object and/or to increase the vapor pressure of the rare-earth element in the interior of the package, and the package is heat treated.

公开(公告)号：US12057261B1

公开(公告)日：2024-08-06

申请号：US18420943

申请日：2024-01-24

Applicant: HANGZHOU QUADRANT TECHNOLOGY CO., LTD.

Inventor： Zhijian Liu ,  Chengliang Ni ,  Li Feng ,  Guwei Wang ,  Dan Xia

IPC: H01F41/02 ,  B32B3/30 ,  B32B7/12 ,  B32B15/09 ,  B32B27/36 ,  B32B37/06 ,  B32B37/12 ,  H01F7/02 ,  H05K9/00

CPC classification number: H01F41/0253 ,  B32B3/30 ,  B32B7/12 ,  B32B15/09 ,  B32B27/36 ,  B32B37/06 ,  B32B37/1284 ,  H01F7/02 ,  H05K9/0075 ,  B32B2307/208 ,  B32B2307/212 ,  B32B2307/7376 ,  B32B2309/02 ,  B32B2309/04 ,  B32B2333/08 ,  B32B2367/00

Abstract: The present application relates to the technical field of electromagnetic-isolation shielding materials, and in particular to a heat-resistant nanocrystalline magnetic-isolation shielding material and a preparation method and application thereof. The preparation method includes the following steps: S1, applying a double-sided adhesive tape onto a nanocrystalline soft-magnetic alloy ribbon to prepare a adhesive-coated nanocrystalline ribbon; S2, performing primary magnet cracking treatment on the adhesive-coated nanocrystalline ribbon to obtain a single-layered nanocrystalline magnetic layer; S3, performing multi-layer combination on the single-layered nanocrystalline magnetic layer to obtain a composite, and performing stress relief treatment on the composite to obtain a multi-layered nanocrystalline magnetic layer; and S4: performing secondary magnet cracking treatment on the multi-layered nanocrystalline magnetic layer to obtain a heat-resistant nanocrystalline magnetic-isolation shielding material.

公开(公告)号：US12046417B2

公开(公告)日：2024-07-23

申请号：US17439705

申请日：2020-03-18

Applicant: UNITED KINGDOM RESEARCH AND INNOVATION

Inventor： James Anthony Clarke ,  Benjamin John Arthur Shepherd ,  Norbert Collomb ,  Alexander Robert Bainbridge

IPC: H01F7/02 ,  H01F7/04 ,  H01F41/02 ,  H05H7/04

CPC classification number: H01F7/0278 ,  H01F41/0253 ,  H05H7/04

Abstract: There is provided a multipole magnet for deflecting a beam of charged particles. The multipole magnet comprises a plurality of ferromagnetic poles and a plurality of permanent magnet assemblies to supply a magnetomotive force to the ferromagnetic poles. At least one of the permanent magnet assemblies has a plurality of discrete permanent magnet positions and a plurality of permanent magnets each fixed in one of the permanent magnet positions.

公开(公告)号：US20240127993A1

公开(公告)日：2024-04-18

申请号：US18091899

申请日：2022-12-30

Applicant: Baotou Jinshan Magnetic Material Co.,Ltd.

Inventor： Feng XIA ,  Yulong FU ,  Chen CHEN ,  Hailong ZHENG ,  Zichao WANG ,  Yonghong LIU ,  Caina SUN ,  Yu WANG

IPC: H01F1/057 ,  B22F1/05 ,  B22F3/16 ,  B22F9/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F41/02

CPC classification number: H01F1/057 ,  B22F1/05 ,  B22F3/16 ,  B22F9/023 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F41/0253 ,  B22F2009/044

Abstract: Provided are an auxiliary alloy casting piece, a high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereof. The method for preparing the auxiliary alloy casting piece includes the following steps: providing an auxiliary alloy material including, by mass percentage, 40% to 45% of Pr, 1% to 2% of Co, 0.5% to 1% of Ga, 0.6% to 0.8% of B, 0.1% to 0.2% of V, 0.3% to 0.7% of Ti, and a balance of Fe; smelting the auxiliary alloy material to obtain a smelted material; and subjecting the smelted material to a quick-setting casting to obtain the auxiliary alloy casting piece; where the quick-setting casting includes a refining and a casting in sequence.

公开(公告)号：US11915844B2

公开(公告)日：2024-02-27

申请号：US16327747

申请日：2017-08-25

Applicant: The University of Birmingham

Inventor： Allan Walton ,  Neil Rowson

IPC: H01F1/057 ,  C22B7/00 ,  H01F41/02 ,  B22F8/00 ,  B22F9/02

CPC classification number: H01F1/0573 ,  B22F8/00 ,  B22F9/023 ,  C22B7/005 ,  H01F1/0571 ,  H01F41/0253 ,  Y02P10/20

Abstract: A method of processing NdFeB magnetic powder comprises: providing a source of hydrogenated NdFeB powder (101, 102, 103); feeding said powder into an inlet of a cyclone separator (104); separating the powder into an overflow enriched in Nd-rich grain boundary phase and an underflow enriched in NdxFeyBHz matrix phase particles (106); optionally feeding the underflow back into the inlet of the cyclone separator whereby to further enrich the underflow in the NdxFeyBHz matrix phase particles (108a); and collecting the underflow (108).

公开(公告)号：US20230405673A1

公开(公告)日：2023-12-21

申请号：US17803385

申请日：2022-06-13

Applicant: Iowa State Unversity Research Foundation, Inc.

Inventor： Jun Cui ,  Ryan T. Ott ,  Wei Tang ,  Xubo Liu ,  Cajetan Ikenna Niebedim ,  Gaoyuan Ouyang ,  Chaochao Pan

IPC: B22F7/04 ,  B22F3/18 ,  B22F5/10 ,  B22F3/24 ,  B32B15/01 ,  H01F41/02

CPC classification number: B22F7/04 ,  B22F3/18 ,  B22F5/10 ,  B22F3/24 ,  B32B15/013 ,  H01F41/0253 ,  B22F2003/185 ,  B22F2003/247 ,  B22F2998/10 ,  B22F2301/355 ,  B22F2007/042 ,  B32B2307/208

Abstract: A method for fabrication of an anisotropic magnet comprises placing magnet alloy feedstock particles in a deformable metallic container and thermomechanically working the filled container in a manner to elongate the filled container and reduce its cross-sectional area to consolidate the magnet alloy particles to an elongated shape and impart a preferential grain texture to the consolidated, elongated shape. The consolidated, elongated shape is machined to a near-final magnet shape that has a smaller dimension such as magnet length and that includes a metallic tubular skin thereon.