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公开(公告)号：US07806991B2
公开(公告)日：2010-10-05
申请号：US11641765
申请日：2006-12-20
申请人： Matahiro Komuro , Yuichi Satsu , Takao Imagawa , Katsumi Ishikawa , Takeyuki Itabashi , Yuzo Kozono
发明人： Matahiro Komuro , Yuichi Satsu , Takao Imagawa , Katsumi Ishikawa , Takeyuki Itabashi , Yuzo Kozono
CPC分类号： H01F1/0577 , H01F1/0572 , H01F1/0579 , H01F41/0293 , H02K1/02 , H02K1/246 , H02K1/276 , H02K1/2766 , H02K1/278
摘要： A lamellar high resistance layer having resistivity ten times or higher than that of a mother phase containing iron or cobalt is formed and an oxygen content is controlled to 10 to 10000 ppm so that the reliability and residual magnetic flux density are increased.
摘要翻译： 形成具有比含有铁或钴的母相的电阻率高十倍以上的层状高电阻层，将氧含量控制在10〜10000ppm，使得可靠性和剩余磁通密度增加。
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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
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％。
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公开(公告)号：US07352184B2
公开(公告)日：2008-04-01
申请号：US11641757
申请日：2006-12-20
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。
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24.发明申请公开(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
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。
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公开(公告)号：US20110254646A1
公开(公告)日：2011-10-20
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： H01F7/02
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％。
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公开(公告)号：US20070151632A1
公开(公告)日：2007-07-05
申请号：US11641765
申请日：2006-12-20
申请人： Matahiro Komuro , Yuichi Satsu , Takao Imagawa , Katsumi Ishikawa , Takeyuki Itabashi , Yuzo Kozono
发明人： Matahiro Komuro , Yuichi Satsu , Takao Imagawa , Katsumi Ishikawa , Takeyuki Itabashi , Yuzo Kozono
IPC分类号： H01F1/20
CPC分类号： H01F1/0577 , H01F1/0572 , H01F1/0579 , H01F41/0293 , H02K1/02 , H02K1/246 , H02K1/276 , H02K1/2766 , H02K1/278
摘要： A lamellar high resistance layer having resistivity ten times or higher than that of a mother phase containing iron or cobalt is formed and an oxygen content is controlled to 10 to 10000 ppm so that the reliability and residual magnetic flux density are increased.
摘要翻译： 形成具有比含有铁或钴的母相的电阻率高十倍以上的层状高电阻层，将氧含量控制在10〜10000ppm，使得可靠性和剩余磁通密度增加。
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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。
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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
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％。
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公开(公告)号：US07914695B2
公开(公告)日：2011-03-29
申请号：US11684889
申请日：2007-03-12
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。
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公开(公告)号：US20080171216A1
公开(公告)日：2008-07-17
申请号：US12050438
申请日：2008-03-18
IPC分类号： H01F1/00
CPC分类号： G01R33/383 , G01R33/3806 , G01R33/3873 , Y10T428/12014
摘要： A magnet which includes ferromagnetic powder to be mainly a mother phase containing iron or cobalt. The ferromagnetic powder is provided with a high-resistance layer which has a resistance higher than or equal to ten times as high as a resistance of the mother phase and a Vickers hardness lower than a Vickers hardness of the mother phase. The high-resistance layer is being formed partially or entirely on the surface of the ferromagnetic powder.
摘要翻译： 一种磁铁，其包括主要是含有铁或钴的母相的铁磁性粉末。 铁磁粉末设置有高电阻层，其电阻高于或等于母相电阻的十倍，维氏硬度低于母相维氏硬度。 高电阻层部分地或完全地形成在铁磁性粉末的表面上。
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