公开(公告)号：US20240021349A1

公开(公告)日：2024-01-18

申请号：US18256189

申请日：2021-12-08

Applicant: TOKIN CORPORATION

Inventor： Hirokazu MAKUTA

IPC: H01F1/055 ,  C22C38/00 ,  C22C38/14 ,  C22C38/10

CPC classification number: H01F1/0551 ,  C22C38/005 ,  C22C38/14 ,  C22C38/10 ,  C22C38/002 ,  C22C2202/02 ,  B22F3/12

Abstract: A permanent magnet having a high coercivity, a method for manufacturing such a permanent magnet, and a device using such a permanent magnet are provided. The permanent magnet has a composition represented by a below-shown Formula (1). Formula (1): (R1-xZrx)a(T1-yMy)bBc. In Formula (1); R is at least one element selected from rare earth elements; T is at least one element selected from a group consisting of Fe, Co and Ni; M is at least one element selected from a group consisting of Al, Si, Ti, V, Cr, Mn, Cu, Hf, Nb, Mo, Ta and W; and each of a, b and c indicates atomic %, and x and y indicate ratios of Zr and M, respectively; and they are numbers that satisfy below-shown Expressions, 5≤a≤12, b=100−(a+c), 0.1≤c≤20, 0.01≤x≤0.5, and 0.01≤y≤0.5.

公开(公告)号：US11742120B2

公开(公告)日：2023-08-29

申请号：US17520452

申请日：2021-11-05

Applicant: BEIJING UNIVERSITY OF TECHNOLOGY

Inventor： Weiqiang Liu ,  Hao Chen ,  Ming Yue ,  Zhi Li ,  Yantao Yin ,  Yuqing Li ,  Hongguo Zhang

IPC: H01F1/057 ,  H01F1/053 ,  H01F1/055 ,  H01F7/02 ,  H01F41/02 ,  B22F9/04 ,  B22F9/02

CPC classification number: H01F1/0573 ,  B22F9/023 ,  B22F9/04 ,  H01F1/0536 ,  H01F1/0551 ,  H01F1/0553 ,  H01F1/0557 ,  H01F1/0577 ,  H01F7/021 ,  H01F41/0266 ,  H01F41/0273 ,  H01F41/0293

Abstract: A two-step diffusion method for preparing high-performance dual-main-phase sintered mischmetal-iron-boron magnet belongs to the preparing technical field of rare earth permanent magnet materials. The compositions of the two main phase alloys are RE-Fe—B (RE is Nd or Pr) and (Nd, MM)-Fe—B (MM is mischmetal), respectively. First, PrHoFe strip-casting alloy is used as a diffusion source. Next, a PrHo-rich layer is uniformly coated on the surface of (Nd, MM)-Fe—B hydrogen decrepitation powders. The higher anisotropic fields of Pr2Fe14B and Ho2Fe14B are used to improve the coercivity. Then, the ZrCu strip-casting alloy is used as a diffusion source. A Zr-rich layer is uniformly coated on the surface of the powders after the first-step diffusion, which prevents the growth of the MM-rich main phase grains during the sintering process and the inter-diffusion between the two main phases, thus obtaining high coercivity.

公开(公告)号：US20230245807A1

公开(公告)日：2023-08-03

申请号：US18013072

申请日：2021-03-31

Applicant: Tohoku University ,  SUMITOMO METAL MINING CO., LTD.

Inventor： Satoshi Sugimoto ,  Masashi Matsuura ,  Takashi Ishikawa ,  Yukinobu Yoneyama

IPC: H01F1/055 ,  B22F1/05 ,  B22F1/10 ,  C22C38/00 ,  C08K9/02

CPC classification number: H01F1/0551 ,  B22F1/05 ,  B22F1/10 ,  C22C38/005 ,  C22C38/001 ,  C08K9/02 ,  B22F2304/10 ,  B22F2301/355 ,  C08K2201/01 ,  C08K2201/005

Abstract: A rare earth-iron-nitrogen-based magnetic powder according to this invention contains, as main constituent components, a rare-earth element (R), iron (Fe), and nitrogen (N). Moreover, this magnetic powder has an average particle size of 1.0-10.0 μm, and contains 22.0-30.0 mass % of a rare-earth element (R) and 2.5-4.0 mass % of nitrogen (N). Further, this magnetic powder includes: a core part having any one crystal structure among a Th2Zn17 type, a Th2Ni17 type, and a TbCu7 type; and a shell layer provided on the surface of the core part and having a thickness of 1-30 nm. The shell layer contains a rare-earth element (R) and iron (Fe) so that the R/Fe atomic ratio is 0.3-5.0, and further contains 0-10 at % (exclusive of 0) of nitrogen (N). Furthermore, this magnetic powder contains compound particles composed of a rare-earth element (R) and phosphorus (P).

公开(公告)号：US20170301441A1

公开(公告)日：2017-10-19

申请号：US15636413

申请日：2017-06-28

Applicant: Simon Fraser University

Inventor： Bonnie GRAY ,  Daniel B. LEZNOFF ,  Jasmine L. KORCOK ,  Ajit KHOSLA

IPC: H01F1/055 ,  H01F1/147 ,  H01F1/058 ,  H01F1/057 ,  G03F7/32 ,  G03F7/004 ,  G03F7/20 ,  G03F7/16 ,  G03F7/038 ,  G03F7/38

CPC classification number: H01F1/0551 ,  B82Y25/00 ,  C22C38/002 ,  C22C38/08 ,  G03F7/0047 ,  G03F7/0385 ,  G03F7/162 ,  G03F7/168 ,  G03F7/2004 ,  G03F7/325 ,  G03F7/38 ,  H01F1/0063 ,  H01F1/0571 ,  H01F1/0578 ,  H01F1/058 ,  H01F1/06 ,  H01F1/083 ,  H01F1/113 ,  H01F1/117 ,  H01F1/14733 ,  H01F1/14791 ,  H01F1/26 ,  H01F1/28

Abstract: Compositions including hard magnetic photoresists, soft photoresists, hard magnetic elastomers and soft magnetic elastomers are provided.

公开(公告)号：US20170278603A1

公开(公告)日：2017-09-28

申请号：US15338649

申请日：2016-10-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyoung-Seok MOON ,  Sang Eui LEE ,  Young Min KANG ,  Dong Hun KIM ,  Min Seok KIM ,  Hiesang SOHN ,  In Taek HAN

IPC: H01F1/055 ,  H01F41/02 ,  H01Q1/36

CPC classification number: H01F1/0551 ,  C04B35/2633 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3232 ,  C04B2235/3244 ,  C04B2235/3262 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/81 ,  H01F1/348 ,  H01F1/37 ,  H01F41/0246 ,  H01F41/0253 ,  H01Q17/00 ,  H01Q17/004

Abstract: A magnetic composite includes a polymeric substrate and a magnetic material including a Z-type phase and represented by the following Chemical Formula: Ba1.5-xSr1.5-xCa2xM2Fe24O41  Chemical Formula wherein, in the Chemical Formula, M is at least one selected from Co, Ni, Cu, Mg, Mn, Ti, Al, Zn, and Zr, and 0≦x

公开(公告)号：US09478333B2

公开(公告)日：2016-10-25

申请号：US14428948

申请日：2013-09-17

Applicant: Nano Resources Limited

Inventor： Robert Davidson Binns ,  Christopher Robin Binns

IPC: H01F7/00 ,  H01F3/00 ,  H01F1/055 ,  H01F10/00 ,  H01F41/30 ,  C23C14/22 ,  B82Y25/00 ,  H01F1/00

CPC classification number: H01F1/0551 ,  B82Y25/00 ,  C23C14/223 ,  H01F1/0054 ,  H01F10/007 ,  H01F41/301

Abstract: The invention relates to a process of and apparatus for forming a magnetic structure on a substrate and a magnetic structure formed by such a process and apparatus. The magnetic structure comprises a matrix in which magnetic particles are embedded. The apparatus for forming the magnetic structure on the substrate comprises a source of matrix deposits the matrix material onto the substrate to form the matrix, and comprises a source of magnetic particles which deposit the magnetic particles onto the matrix as the matrix forms to embed the magnetic particles in the matrix. Each magnetic particle comprises a core covered with a layer of metal, at least one of the matrix material and the core is of ferromagnetic material and the core and the layer of metal are of different materials.

Abstract translation: 本发明涉及一种用于在基板上形成磁性结构的方法和装置以及由这种工艺和装置形成的磁性结构。 磁性结构包括嵌入有磁性颗粒的矩阵。 用于在衬底上形成磁性结构的装置包括基体源，将基体材料沉积到衬底上以形成基体，并且包括将磁性颗粒沉积到基质上的磁性颗粒源，因为矩阵形成以嵌入磁性 矩阵中的粒子。 每个磁性颗粒包括被金属层覆盖的芯体，基体材料和芯体中的至少一个是铁磁材料，并且金属芯和金属层是不同的材料。

公开(公告)号：US20160180993A1

公开(公告)日：2016-06-23

申请号：US14909563

申请日：2014-08-08

Applicant: TDK CORPORATION

Inventor： Isao KANADA ,  Hiroyuki ONO ,  Eiji KATO ,  Masashi MIWA

IPC: H01F1/057 ,  H01F1/055 ,  C22C38/06 ,  C22C38/00 ,  C22C38/16 ,  C22C38/10

CPC classification number: H01F1/0577 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0551 ,  H01F41/0293 ,  H02K1/02 ,  B22F3/087 ,  B22F2202/05 ,  B22F9/023 ,  B22F9/04 ,  B22F3/1007 ,  B22F3/1028 ,  B22F2201/20

Abstract: The present invention provides an R-T-B based sintered magnet that inhibits the demagnetization rate at high temperature even when less or no heavy rare earth elements such as Dy, Tb and the like are used. The R-T-B based sintered magnet comprises R2T14B crystal grains and two-grain boundary parts between the R2T14B crystal grains. Two-grain boundary parts formed by a phase containing R, Cu, Co, Ga and Fe with a ratio of 40≦R≦70, 1≦Co≦10, 5≦Cu≦50, 1≦Ga≦15, and 1≦Fe≦40 (wherein, R+Cu+Co+Ga+Fe=100, and R is at least one selected from rare earth elements) exists in the magnet.

Abstract translation: 本发明提供一种即使在使用较少或不重稀土元素如Dy，Tb等的情况下也能抑制高温退磁速度的R-T-B系烧结磁体。 R-T-B系烧结磁体包括R2T14B晶粒和R2T14B晶粒之间的两晶界面部分。 由含有R，Cu，Co，Ga和Fe的相组成的具有40和nlE的相的两晶边界部分; R＆lt; E; 70,1＆amp; NlE; Co＆NlE; 10，5＆amp; N; Cu＆NlE; 50,1和nlE; Ga和nlE; 15和1＆ Fe（n）; 40（其中，R + Cu + Co + Ga + Fe = 100，R为选自稀土元素中的至少一种）。

公开(公告)号：US20150332831A1

公开(公告)日：2015-11-19

申请号：US14758447

申请日：2014-01-03

Applicant: JIANGSU MULTIDIMENSIONAL TECHNOLOGY CO., LTD

Inventor： James Geza Deak ,  Zhimin Zhou

IPC: H01F7/02 ,  H01F1/047 ,  H01F1/055 ,  H01F1/06

CPC classification number: H01F7/021 ,  G01D5/145 ,  H01F1/047 ,  H01F1/0551 ,  H01F1/06 ,  H01F7/0289

Abstract: The present invention relates to a permanent magnet suitable for a magnetic angle encoder. The permanent magnet has an annular cylindrical structure and comprises a first permanent magnet unit and a second permanent magnet unit. The first permanent magnet unit and the second permanent magnet unit are geometrically symmetrical with respect to a diametral cross section. The magnetisation intensity of the first permanent magnet unit and the magnetisation intensity of the second permanent magnet unit are parallel to the axial direction of the annular cylinder and are in opposite directions, or the magnetisation intensity of the first permanent magnet unit and the magnetisation intensity of the second permanent magnet unit are perpendicular to the diametral cross section and are parallel to one another and in the same direction.

Abstract translation: 本发明涉及一种适用于磁角编码器的永磁体。 永磁体具有环形圆柱形结构并且包括第一永磁体单元和第二永磁体单元。 第一永磁体单元和第二永磁体单元相对于直径横截面几何对称。 第一永磁体单元的磁化强度和第二永久磁铁单元的磁化强度平行于环形圆筒的轴向，并且处于相反方向，或第一永磁体单元的磁化强度和磁化强度 第二永磁体单元垂直于直径横截面并彼此平行并且沿相同的方向。

公开(公告)号：US20150318089A1

公开(公告)日：2015-11-05

申请号：US14651560

申请日：2013-05-31

Applicant: Hongwei Li ,  Yang Luo ,  Dunbo Yu ,  Kuoshe Li ,  Wenlong Yan ,  Shipeng Li ,  Yongqiang Yuan ,  Haijun Peng

Inventor： Hongwei Li ,  Yang Luo ,  Dunbo Yu ,  Kuoshe Li ,  Wenlong Yan ,  Shipeng Li ,  Yongqiang Yuan ,  Haijun Peng

IPC: H01F1/059 ,  H01F1/22 ,  H01F41/02 ,  C21D6/00 ,  C21D1/18 ,  C22C38/00 ,  C22C38/10 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/02 ,  B22F9/08 ,  C23C8/22 ,  C23C8/26 ,  H01F1/055 ,  H01F1/08

CPC classification number: H01F1/059 ,  B22F9/082 ,  B22F2998/10 ,  B22F2999/00 ,  C21D1/18 ,  C21D6/00 ,  C22C33/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C2202/02 ,  C23C8/22 ,  C23C8/26 ,  H01F1/0551 ,  H01F1/0558 ,  H01F1/083 ,  H01F1/22 ,  H01F41/0266 ,  B22F2009/048 ,  B22F1/0088 ,  B22F2201/30 ,  B22F2201/02

Abstract: A rare-earth permanent magnetic powder, a bonded magnet containing thereof and a device using the bonded magnet are provided of the present disclosure. The rare-earth permanent magnetic powder comprises: 70 vol % to 99 vol % of a hard magnetic phase and 1 vol % to 30 vol % of a soft magnetic phase, the hard magnetic phase has a TbCu7 structure, and the grain size of the hard magnetic phase is 5 nm to 100 nm; the soft magnetic phase is a Fe phase having a bcc structure, the average grain size of the soft magnetic phase is 1 nm to 30 nm, and the standard deviation of the grain size is below 0.5σ.

Abstract translation: 本公开提供了一种稀土永磁粉末，其含有的粘结磁体和使用该粘结磁体的装置。 稀土永久磁铁粉末含有70〜99体积％的硬磁性相和1〜30体积％的软磁性相，硬磁性相具有TbCu 7结构， 硬磁相为5nm〜100nm; 软磁性相是具有bcc结构的Fe相，软磁性相的平均粒径为1nm〜30nm，晶粒尺寸的标准偏差小于0.5μm。

公开(公告)号：US20150248955A1

公开(公告)日：2015-09-03

申请号：US14428948

申请日：2013-09-17

Applicant: HIPERMAG LIMITED

Inventor： Robert Davidson Binns ,  Christopher Robin Binns

IPC: H01F1/055

CPC classification number: H01F1/0551 ,  B82Y25/00 ,  C23C14/223 ,  H01F1/0054 ,  H01F10/007 ,  H01F41/301

Abstract: The present invention relates to a process of and apparatus for forming a magnetic structure on a substrate (44) and also a magnetic structure formed by such a process and apparatus. The magnetic structure comprises a matrix in which magnetic particles are embedded. Apparatus (30) for forming the magnetic structure on the substrate (44) comprises a source of matrix material (32) which is operable to deposit the matrix material onto the substrate to thereby form the matrix. The apparatus (30) for forming the magnetic structure further comprises a source of magnetic particles (34) which is operable to deposit the magnetic particles onto the matrix as the matrix forms to thereby embed the magnetic particles in the matrix. Each magnetic particle comprises a core covered at least in part with a layer of metal, at least one of the matrix material and the core is of ferromagnetic material and the core and the layer of metal are of different materials.

Abstract translation: 本发明涉及一种用于在基板（44）上形成磁性结构的方法和装置，以及由这种工艺和装置形成的磁性结构。 磁性结构包括嵌入有磁性颗粒的矩阵。 用于在衬底（44）上形成磁性结构的装置（30）包括基质材料源（32），其可操作以将基质材料沉积到衬底上，从而形成基体。 用于形成磁性结构的装置（30）还包括磁性颗粒源（34），该磁性颗粒源可以将磁性颗粒沉积在矩阵上，从而将磁性颗粒嵌入基质中。 每个磁性颗粒包括至少部分地被一层金属覆盖的芯，所述基体材料和芯中的至少一个是铁磁材料，并且所述芯和所述金属层是不同的材料。