公开(公告)号：US07696662B2

公开(公告)日：2010-04-13

申请号：US11838266

申请日：2007-08-14

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa

IPC分类号： H02K21/12 ,  H02K37/00

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：US20100079025A1

公开(公告)日：2010-04-01

申请号：US12543068

申请日：2009-08-18

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

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

IPC分类号： H02K21/12 ,  H01F7/02

CPC分类号： H02K1/2766 ,  H01F1/0577 ,  H01F41/0253 ,  H01F41/0293 ,  H02K1/02

摘要： A sintered magnet and a rotating machine equipped therewith are disclosed, which include: crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or an oxyfluoride compound, containing at least one element selected from the group consisting of an alkali metal element, an alkaline earth metal element, and a rare earth element, the fluoride compound or the oxyfluoride compound being formed inside some of the crystal grains or in a part of a grain boundary part. The oxyfluoride compound or the fluoride compound contains carbon, and a grain boundary width of the ferromagnetic material is smaller than a grain boundary width of the ferromagnetic material in which the fluoride compound or the oxyfluoride compound is formed.

摘要翻译： 公开了一种烧结磁铁及其旋转机械，它包括：主要由铁组成的铁磁性材料的晶粒和含有至少一种选自碱金属元素的元素的氟化物或氟氧化物， ，碱土金属元素和稀土元素，所述氟化物或氟氧化物化合物形成在一些晶粒内部或部分晶界部分中。 氟氧化物或氟化合物含有碳，铁磁材料的晶界宽度小于其中形成氟化物或氟氧化物的铁磁材料的晶界宽度。

公开(公告)号：US07569114B2

公开(公告)日：2009-08-04

申请号：US11652617

申请日：2007-01-12

申请人： Matahiro Komuro ,  Yuichi Satsu

发明人： Matahiro Komuro ,  Yuichi Satsu

IPC分类号： H01F1/057

CPC分类号： H01F1/0572 ,  H01F41/0293 ,  Y10T428/2991

摘要： The object of the present invention is to provide a rare earth magnet which enables to achieve a good balance between high coercive force and high residual magnetic flux density, and its manufacturing method. The present invention provides a rare earth magnet in which a layered grain boundary phase is formed on a surface or a potion of a grain boundary of Nd2Fe14B which is a main phase of an R—Fe—B (R is a rare-earth element) based magnet, and wherein the grain boundary phase contains a fluoride compound, and wherein a thickness of the fluoride compound is 10 μm or less, or a thickness of the fluoride compound is from 0.1 μm to 10 μm, and wherein the coverage of the fluoride compound over a main phase particle is 50% or more on average. Moreover, after layering fluoride compound powder, which is formed in plate-like shape, in the grain boundary phase, the rare earth magnet is manufactured by quenching the layered compound after melting it at a vacuum atmosphere at a predetermined temperature, or by heating and pressing the main phase and the fluoride compound to make the fluoride compound into a layered fluoride compound along the grain boundary phase.

摘要翻译： 本发明的目的是提供一种能够在高矫顽力和高残留磁通密度之间实现良好平衡的稀土类磁铁及其制造方法。 本发明提供一种在作为R-Fe-B（R为稀土类元素）的主相的Nd2Fe14B的晶界的表面或部分形成层状晶界相的稀土类磁铁， 并且其中所述晶界相包含氟化物，并且其中所述氟化物的厚度为10μm以下，或者所述氟化物的厚度为0.1μm〜10μm，并且其中所述氟化物的覆盖率 主相粒子上的化合物平均为50％以上。 此外，在晶界相中形成板状的氟化物复合粉末之后，通过在预定温度下在真空气氛下或通过加热熔化之后将层状化合物淬火来制造稀土磁铁， 按下主相和氟化物，使氟化合物沿着晶界相成为层状氟化物。

公开(公告)号：US20090189471A1

公开(公告)日：2009-07-30

申请号：US12181901

申请日：2008-07-29

申请人： Hisato Amano ,  Yuji Enomoto ,  Matahiro Komuro ,  Yuichi Satsu ,  Fumio Tajima

发明人： Hisato Amano ,  Yuji Enomoto ,  Matahiro Komuro ,  Yuichi Satsu ,  Fumio Tajima

IPC分类号： H02K21/22

CPC分类号： G11B19/2009 ,  H02K1/146 ,  H02K21/22 ,  H02K29/03

摘要： A spindle motor having a stator and a rotor includes: a stator core provided in the stator having salient-poles; a stator coil arranged between the salient-poles; a rotor; and a permanent magnet provided in the rotor. The stator core includes a stack of steel sheets whose salient-poles are formed by etching. The permanent magnet includes a ferromagnetic material consisting mainly of iron. The ferromagnetic material has formed in laminae on a surface thereof a layer of a fluorine compound containing an alkali element, an alkaline earth element or a rare earth element formed in laminae. Near an interface between the ferromagnetic material and the layer of the fluorine compound, iron exists in the layer of the fluorine compound such that a basic crystal structure of the fluorine compound is not changed and the fluorine compound containing the iron exists in the layer of the fluorine compound.

摘要翻译： 具有定子和转子的主轴电动机包括：定子芯，其设置在具有凸极的定子中; 布置在凸极之间的定子线圈; 转子 以及设置在转子中的永磁体。 定子铁芯包括通过蚀刻形成凸极的钢板叠层。 永磁体包括主要由铁组成的铁磁材料。 铁磁材料在其表面上形成有层状的氟化合物，其含有形成在层中的碱金属元素，碱土金属元素或稀土元素。 在铁磁材料和氟化合物层之间的界面附近，铁存在于氟化合物的层中，使得氟化合物的碱性晶体结构不变，含铁的氟化合物存在于 氟化合物。

公开(公告)号：US20080260564A1

公开(公告)日：2008-10-23

申请号：US12099800

申请日：2008-04-09

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

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

IPC分类号： B22F1/02 ,  H01F1/04

CPC分类号： H01F1/24 ,  B22F1/02 ,  B22F2003/248 ,  B22F2998/10 ,  C22C33/0228 ,  C22C2202/02 ,  H01F41/0246 ,  B22F9/082 ,  B22F1/0085 ,  B22F3/02 ,  B22F3/24

摘要： A manufacturing method of a magnetic core includes a first step of applying a treatment liquid for forming an insulating film to iron powder; a second step of heat-treating the iron powder to which the treatment liquid has been applied, at a temperature higher than 350 degrees; a third step of compacting the heat-treated iron powder to form a magnetic core; and a forth step of heat-treating the magnetic core at a temperature ranging from 600 degrees to 800 degrees.

摘要翻译： 磁芯的制造方法包括：向铁粉施加用于形成绝缘膜的处理液的第一工序; 在高于350度的温度下对已经施加了处理液的铁粉进行热处理的第二步骤; 压制热处理铁粉以形成磁芯的第三步骤; 以及在600〜800度的温度下对磁芯进行热处理的第四工序。

公开(公告)号：US07352184B2

公开(公告)日：2008-04-01

申请号：US11641757

申请日：2006-12-20

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Katsumi Ishikawa ,  Takeyuki Itabashi

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takao Imagawa ,  Katsumi Ishikawa ,  Takeyuki Itabashi

IPC分类号： G01V3/00

CPC分类号： G01R33/383 ,  G01R33/3806 ,  G01R33/3873 ,  Y10T428/12014

摘要： Eddy current generated around a magnetic circuit in an MRI apparatus is one of the causes of deviation from an ideal magnetic field gradient waveform and causes image distortion, loss of strength, ghost generation, loss of signal, and spectral distortion. An object of the present invention is to suppress the generation of the eddy current. In an MRI apparatus, a ferromagnetic material formed from powder is used in a part of a magnetic circuit: the powder mainly comprising a mother phase containing iron or cobalt and showing ferromagnetism; and a high-resistance layer having a resistance not less than ten times as high as the mother phase and a Vickers hardness lower than that of the mother phase being formed in layers along parts of the surface of the powder on parts or the entire of the surface.

摘要翻译： 在MRI装置中围绕磁路产生的涡流是偏离理想磁场梯度波形的原因之一，并且导致图像失真，强度损失，重影产生，信号损失和光谱失真。 本发明的目的是抑制涡电流的产生。 在MRI装置中，在磁路的一部分中使用由粉末形成的铁磁材料，该粉末主要包含含有铁或钴的母相并显示出铁磁性; 以及耐电压不低于母相的十倍的高电阻层，维氏硬度低于母相的部分或全部沿着粉末表面的一部分形成的层， 表面。

公开(公告)号：US20080008897A1

公开(公告)日：2008-01-10

申请号：US11774238

申请日：2007-07-06

申请人： Takao IMAGAWA ,  Yuichi Satsu ,  Matahiro Komuro

发明人： Takao IMAGAWA ,  Yuichi Satsu ,  Matahiro Komuro

IPC分类号： H01F1/24 ,  B22F1/02 ,  B22F3/16

CPC分类号： B22F1/02 ,  B22F2998/10 ,  H01F1/24 ,  H01F41/0246 ,  Y10T428/12014 ,  Y10T428/12181 ,  B22F9/24 ,  B22F9/04 ,  B22F9/082

摘要： A magnetic powder according to the present invention comprises powder made of the iron element as a main component, and an insulator covering the surface of the powder. The powder has a spherical shape or a smoothed surface. The insulator comprises rare earth fluorides, alkaline metal fluorides, or alkaline earth metal fluorides. A soft magnetic composite formed by using this magnetic powder can suppress its eddy current loss in a wide frequency band and can also suppress its hysteresis loss due to compressed residual distortion in soft magnetic powder.

摘要翻译： 根据本发明的磁粉包括以铁元素为主要成分的粉末和覆盖粉末表面的绝缘体。 该粉末具有球形或平滑的表面。 绝缘体包括稀土氟化物，碱金属氟化物或碱土金属氟化物。 通过使用该磁性粉末形成的软磁性复合体可以抑制其在宽频带中的涡流损耗，并且还可以抑制由软磁粉末中的压缩残余变形引起的滞后损耗。

公开(公告)号：US09129731B2

公开(公告)日：2015-09-08

申请号：US13572812

申请日：2012-08-13

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Isao Kitagawa ,  Akira Sugawara

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Isao Kitagawa ,  Akira Sugawara

IPC分类号： H01F7/02 ,  H01F1/01 ,  H01F1/057

CPC分类号： H01F1/0572 ,  H01F1/0577 ,  H01F1/0579

摘要： Disclosed is a sintered magnet which is a rare-earth magnet using a less amount of a rare-earth element but having a higher maximum energy product and a higher coercivity. The sintered magnet includes a NdFeB crystal; and an FeCo crystal adjacent to the NdFeB crystal through the medium of a grain boundary. The FeCo crystal includes a core and a periphery and has a cobalt concentration decreasing from the core to the periphery. The FeCo crystal has a difference in cobalt concentration of 2 atomic percent or more between the core and the periphery. In the NdFeB crystal, cobalt and a heavy rare-earth element are unevenly distributed and enriched in the vicinity of the grain boundary.

摘要翻译： 公开了一种使用少量稀土元素但具有较高最大能量积和较高矫顽力的稀土类磁体的烧结磁体。 烧结磁体包括NdFeB晶体; 以及通过晶界的介质与NdFeB晶体相邻的FeCo晶体。 FeCo晶体包括芯和周边，并且具有从芯到周边的钴浓度降低。 FeCo晶体在芯和周边之间的钴浓度不同于2原子％以上。 在NdFeB晶体中，钴和重稀土元素不均匀分布并富集在晶界附近。

公开(公告)号：US20130069746A1

公开(公告)日：2013-03-21

申请号：US13572812

申请日：2012-08-13

申请人： Matahiro KOMURO ,  Yuichi Satsu ,  Isao Kitagawa ,  Akira Sugawara

发明人： Matahiro KOMURO ,  Yuichi Satsu ,  Isao Kitagawa ,  Akira Sugawara

IPC分类号： H01F7/02 ,  H01F1/01

CPC分类号： H01F1/0572 ,  H01F1/0577 ,  H01F1/0579

摘要： Disclosed is a sintered magnet which is a rare-earth magnet using a less amount of a rare-earth element but having a higher maximum energy product and a higher coercivity. The sintered magnet includes a NdFeB crystal; and an FeCo crystal adjacent to the NdFeB crystal through the medium of a grain boundary. The FeCo crystal includes a core and a periphery and has a cobalt concentration decreasing from the core to the periphery. The FeCo crystal has a difference in cobalt concentration of 2 atomic percent or more between the core and the periphery. In the NdFeB crystal, cobalt and a heavy rare-earth element are unevenly distributed and enriched in the vicinity of the grain boundary.

摘要翻译： 公开了一种使用少量稀土元素但具有较高最大能量积和较高矫顽力的稀土类磁体的烧结磁体。 烧结磁体包括NdFeB晶体; 以及通过晶界的介质与NdFeB晶体相邻的FeCo晶体。 FeCo晶体包括芯和周边，并且具有从芯到周边的钴浓度降低。 FeCo晶体在芯和周边之间的钴浓度不同于2原子％以上。 在NdFeB晶体中，钴和重稀土元素不均匀分布并富集在晶界附近。

公开(公告)号：US08388769B2

公开(公告)日：2013-03-05

申请号：US11641073

申请日：2006-12-19

申请人： Matahiro Komuro ,  Yuichi Satsu ,  Takashi Yasuhara

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Takashi Yasuhara

IPC分类号： H01F1/053

CPC分类号： H01F1/0576 ,  H01F1/0572 ,  H01F41/0293 ,  H02K1/02 ,  H02K1/276 ,  H02K1/278

摘要： To mold a high-resistance magnet at low temperature, including room temperature, the magnet includes magnetic powders, metallic powders having a lower hardness than the magnetic powders and a high-resistance layer, wherein the magnetic powders occupy a larger volume than the metallic powders. In particular, the high-resistance layer contains a fluorine compound and is placed between the magnetic powder and the metallic powders.

摘要翻译： 为了在包括室温的低温下模制高电阻磁体，磁体包括磁粉，具有比磁粉低的硬度的金属粉末和高电阻层，其中磁粉占据比金属粉末更大的体积 。 特别地，高电阻层含有氟化合物，并且被置于磁性粉末和金属粉末之间。