公开(公告)号：US08303732B2

公开(公告)日：2012-11-06

申请号：US12696074

申请日：2010-01-29

申请人： Hiroyuki Suzuki ,  Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

发明人： Hiroyuki Suzuki ,  Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

IPC分类号： H01F1/057

CPC分类号： C22C1/0441 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0293

摘要： A rare earth magnet having a composition represented by RTB wherein R denotes a rare earth element, T a transition metal and B boron, the magnet being composed of magnet powder constituted by crystalline particles. The particles of the magnetic powder have a ratio of a short diameter being 10 μm or more to a long diameter is 0.5 or less. An element Rm having a magnetic anisotropy higher than that of the rare earth element is contained in the surface and inside of the magnet constituted by the magnet powder in an approximately constant concentration. An oxy-fluoride and carbon are present at boundaries of the particles of the magnet powder.

摘要翻译： 具有由RTB表示的组成的稀土类磁体，其中R表示稀土元素，T是过渡金属和B硼，所述磁体由由结晶颗粒构成的磁体粉末组成。 磁粉的粒子的短径为10μm以上的长径比为0.5以下。 具有高于稀土元素的磁各向异性的元素Rm被包含在以大致恒定的浓度由磁体粉末构成的磁体的表面和内部。 氧氟化物和碳存在于磁体粉末颗粒的边界处。

公开(公告)号：US20120025651A1

公开(公告)日：2012-02-02

申请号：US13257331

申请日：2010-02-18

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Hiroyuki Suzuki ,  Takao Imagawa

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Hiroyuki Suzuki ,  Takao Imagawa

IPC分类号： H01F1/04 ,  H02K21/02

CPC分类号： H01F1/0577 ,  C22C2202/02 ,  H01F1/0572 ,  H01F41/0266 ,  H01F41/0293

摘要： A sintered magnet according to the present invention is a sintered magnet configured from a magnetic powder grain having Nd2Fe14B as a main component, in which: fluorine, a heavy rare earth element, oxygen, and carbon are segregated in part of grain-boundary regions of said sintered magnetic powder grain; concentration of the carbon is higher than concentration of the fluorine at a grain-boundary triple junction of the grain-boundary region; and concentration of the heavy rare earth element decreases from said grain-boundary triple junction toward an inside of said magnetic powder grain.

摘要翻译： 根据本发明的烧结磁体是由以Nd2Fe14B为主要成分的磁性粉末颗粒构成的烧结磁体，其中，氟，重稀土元素，氧和碳在部分晶界区域分离 所述烧结磁粉颗粒; 碳的浓度高于晶界的晶界三重结的氟浓度; 并且所述重稀土元素的浓度从所述晶界三重结点向所述磁粉颗粒的内部减少。

公开(公告)号：US07972450B2

公开(公告)日：2011-07-05

申请号：US12708580

申请日：2010-02-19

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

IPC分类号： H01F1/00 ,  H02K1/27 ,  H02K1/06 ,  H02K5/10 ,  H02K21/12 ,  H02K3/48 ,  H02K1/12

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/65 ,  G11B5/743 ,  H01F1/0571 ,  H01F41/0293 ,  H02K1/02 ,  Y10T29/53261 ,  Y10T409/305656 ,  Y10T409/305712 ,  Y10T409/305768 ,  Y10T409/305824 ,  Y10T428/258 ,  Y10T428/26

摘要： A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.

摘要翻译： 一种磁铁，其主要成分为铁，铁素体晶粒表面存在氟化合物层或碱金属，碱土金属，稀土元素的氟化物粒子的氧氟化合物层， 其中，所述氟化合物粒子中的铁原子量为1〜50原子％。

公开(公告)号：US07816820B2

公开(公告)日：2010-10-19

申请号：US11924779

申请日：2007-10-26

申请人： Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

发明人： Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

IPC分类号： H02K15/12 ,  H02K21/12

CPC分类号： H01F41/0246 ,  B22F1/02 ,  B22F2003/248 ,  B22F2998/10 ,  C22C2202/02 ,  H01F1/24 ,  H01F3/08 ,  H02K1/02 ,  Y02T10/641 ,  B22F9/08 ,  B22F1/0085 ,  B22F3/02 ,  B22F3/24

摘要： A compacted magnetic core with a high resistance, which comprises compacted magnetic powder of an iron powder or an alloy powder containing iron as a main ingredient and a layer of a rare earth metal fluoride or an alkaline earth metal fluoride on the surface of the powder, wherein the rare earth metal fluoride or the alkaline earth metal fluoride contains fluorine-depleted crystal lattice at a rate of 10% or less.

摘要翻译： 一种具有高电阻的压制磁芯，其包括在粉末表面上的铁粉或含铁作为主要成分的合金粉末和稀土金属氟化物或碱土金属氟化物层的压粉磁粉， 其中所述稀土金属氟化物或所述碱土金属氟化物以10％以下的比例含有富含氟的晶格。

公开(公告)号：US20080100154A1

公开(公告)日：2008-05-01

申请号：US11924779

申请日：2007-10-26

申请人： Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

发明人： Takao Imagawa ,  Yuichi Satsu ,  Matahiro Komuro

IPC分类号： H01F3/08 ,  B22F1/02 ,  H02K15/02 ,  H02K15/12 ,  B22F3/02

CPC分类号： H01F41/0246 ,  B22F1/02 ,  B22F2003/248 ,  B22F2998/10 ,  C22C2202/02 ,  H01F1/24 ,  H01F3/08 ,  H02K1/02 ,  Y02T10/641 ,  B22F9/08 ,  B22F1/0085 ,  B22F3/02 ,  B22F3/24

摘要： A compacted magnetic core with a high resistance, which comprises compacted magnetic powder of an iron powder or an alloy powder containing iron as a main ingredient and a layer of a rare earth metal fluoride or an alkaline earth metal fluoride on the surface of the powder, wherein the rare earth metal fluoride or the alkaline earth metal fluoride contains fluorine-depleted crystal lattice at a rate of 10% or less.

摘要翻译： 一种具有高电阻的压制磁芯，其包括在粉末表面上的铁粉或含铁作为主要成分的合金粉末和稀土金属氟化物或碱土金属氟化物层的压粉磁粉， 其中所述稀土金属氟化物或所述碱土金属氟化物以10％以下的比例含有富含氟的晶格。

公开(公告)号：US20060152864A1

公开(公告)日：2006-07-13

申请号：US11372302

申请日：2006-03-08

申请人： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

发明人： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3967 ,  G11B2005/3996

摘要： A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track width is 200 nm or less, and a difference between a product of saturation magnetic flux density and a film thickness of the first free magnetic film, and that of the second free magnetic film is within a range from 1 to 3 nmT. By this structure, the variation of output and the variation of asymmetry is greatly decreased at a track width of 200 nm or less.

摘要翻译： 磁阻头包括具有夹在其间的非磁性中间膜的第一和第二自由磁性膜的自由磁性层，第一和第二自由磁性膜的各自的磁化方向是反平行的。 自由磁性层在磁道宽度方向上的长度为200nm以下，饱和磁通密度与第一自由磁性膜的膜厚的乘积与第二自由磁性膜的膜厚之差 在1〜3nmT的范围内。 通过这种结构，在200nm或更小的轨道宽度处，输出的变化和不对称性的变化大大降低。

公开(公告)号：US20150170809A1

公开(公告)日：2015-06-18

申请号：US14404406

申请日：2012-05-30

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

IPC分类号： H01F1/057 ,  B22F3/10 ,  C22C38/00 ,  C22C38/10 ,  C22C38/02 ,  C22C38/14 ,  C22C38/28 ,  C22C38/30 ,  C22C38/12 ,  C22C12/00 ,  H01F41/02 ,  C22C38/16

CPC分类号： H01F1/0577 ,  B22F3/10 ,  C22C1/02 ,  C22C12/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/30 ,  H01F41/0253 ,  H01F41/0293

摘要： The purpose of the present invention is to improve the magnetic characteristics of a sintered magnet without any additional heavy rare earth element. A sintered magnet composed of an NdFeB main phase and a grain boundary phase, wherein; the grain boundary phase contains an oxyfluoride; the concentration of fluorine in the oxyfluoride is higher than that of oxygen therein; the concentration of fluorine in the oxyfluoride decreases depthwise from the surface of the sintered magnet toward the center thereof; and the saturation magnetic flux density of the sintered magnet decreases depthwise from the surface of the sintered magnet toward the center thereof.

摘要翻译： 本发明的目的是提高烧结磁体的磁特性，而不需要任何额外的重稀土元素。 由NdFeB主相和晶界相组成的烧结磁体，其特征在于， 晶界相含有氟氧化物; 氟氧化物中氟的浓度高于其中的氧浓度; 氟氧化物中氟的浓度从烧结磁体的表面向其中心的深度方向减小; 并且烧结磁体的饱和磁通密度从烧结磁体的表面向其中心的深度方向减小。

公开(公告)号：US08764917B2

公开(公告)日：2014-07-01

申请号：US12956253

申请日：2010-11-30

申请人： Hiroyuki Suzuki ,  Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

发明人： Hiroyuki Suzuki ,  Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

IPC分类号： H01F1/055

CPC分类号： H01F1/055 ,  C22C38/005 ,  H01F1/0552 ,  H01F1/11 ,  H01F1/112

摘要： A ferromagnetic compound magnet in accordance with the present invention includes a ferromagnetic compound based on a binary alloy containing R—Fe system (R is a 4f transition element or Y) or a ternary allay containing R—Fe-T system (R is a 4f transition element or Y, and T is a 3d transition element except for Fe, or Mo, Nb or W), the ferromagnetic compound being characterized by: atomic percentage of the element R to the element Fe or to the elements Fe and T is 15% or lower; an element F is incorporated into an interstitial position in a crystal lattice of the alloy. The ferromagnetic compound is expressed in a chemical formula of: R2Fe17Fx; R2(Fe,T)17Fx; R3Fe29Fy; R3(Fe,T)29Fy; RFe12Fz; or R(Fe,T)12Fz (0

摘要翻译： 根据本发明的铁磁性复合磁体包括基于含有R-Fe体系的二元合金（R为4f过渡元素或Y）或含有R-Fe-T体系的三元共聚物（R为4f）的铁磁性化合物 过渡元素或Y，T是除Fe或Mo，Nb或W以外的3d过渡元素），铁磁性化合物的特征在于：元素R与元素Fe或元素Fe和T的原子百分比为15 ％以下; 元素F被结合到合金的晶格中的间隙位置。 铁磁性化合物以化学式表示：R2Fe17Fx; R2（Fe，T）17Fx; R3Fe29Fy; R3（Fe，T）29Fy; RFe12Fz; 或R（Fe，T）12Fz（0

公开(公告)号：US08222785B2

公开(公告)日：2012-07-17

申请号：US13169205

申请日：2011-06-27

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

IPC分类号： H02K21/12 ,  H02K21/26 ,  H01F1/00

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/65 ,  G11B5/743 ,  H01F1/0571 ,  H01F41/0293 ,  H02K1/02 ,  Y10T29/53261 ,  Y10T409/305656 ,  Y10T409/305712 ,  Y10T409/305768 ,  Y10T409/305824 ,  Y10T428/258 ,  Y10T428/26

摘要： A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.

摘要翻译： 一种磁铁，其主要成分为铁，铁素体晶粒表面存在氟化合物层或碱金属，碱土金属，稀土元素的氟化物粒子的氧氟化合物层， 其中，所述氟化合物粒子中的铁原子量为1〜50原子％。

公开(公告)号：US07914695B2

公开(公告)日：2011-03-29

申请号：US11684889

申请日：2007-03-12

申请人： Yuichi Satsu ,  Matahiro Komuro ,  Takao Imagawa ,  Takashi Yasuhara ,  Yutaka Matsunobu

发明人： Yuichi Satsu ,  Matahiro Komuro ,  Takao Imagawa ,  Takashi Yasuhara ,  Yutaka Matsunobu

IPC分类号： H01F1/08

CPC分类号： H01F1/0578 ,  B22F1/02 ,  B22F2998/00 ,  C22C1/1036 ,  C22C38/005 ,  C22C2202/02 ,  H01F41/026 ,  H01F41/0266 ,  H01F41/0293 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/2991 ,  Y10T428/2998 ,  C22C33/0278

摘要： The object of the present invention is to both reduce costs and improve magnetic characteristics of rare-earth bond magnets in which magnetic material is bound with a binding agent. In order to achieve this object, magnetic characteristics of a magnet are improved by performing cold forming on rare-earth magnetic powder by itself with no resin added. Then, in order to provide strength for the magnet, a low-viscosity SiO2 precursor is infiltrated and thermoset in the magnet shaped body. As a result, it is possible to obtain a rare-earth bond magnet in which magnetic characteristics are improved and costs are reduced.

摘要翻译： 本发明的目的在于降低磁性材料与粘合剂结合的稀土类磁铁的成本和磁特性。 为了达到这个目的，通过在不添加树脂的情况下对稀土磁性粉末进行冷成型，可以提高磁体的磁特性。 然后，为了为磁体提供强度，低粘度的SiO 2前体渗透并在磁体成形体中热固化。 结果，可以获得磁特性提高并且成本降低的稀土粘结磁体。