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1. 发明专利

JPH05174360A MAGNETIC RECORDING MEDIUM AND RECORDING SYSTEM 失效
公开(公告)号：JPH05174360A
公开(公告)日：1993-07-13
申请号：JP35407091
申请日：1991-12-19
申请人： TOKYO JIKI INSATSU KK , TDK CORP
发明人： MIMURA SHOHEI , TAKAHASHI HARUYUKI , YONEYAMA TETSUTO , MORO EIJI
IPC分类号： B42D15/10 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G06K19/06 , G11B5/706 , G11B5/73 , G11B5/80
摘要： PURPOSE:To prevent forgery by heating and writing in the magnetic recording medium formed by mixing a 2nd magnetic material having low coercive force and high Curie temp. into a 1st magnetic material having high coercive force and low Curie CONSTITUTION:The magnetic recording layer 3 constituted by mixing the magnetic material 2 having the low coercive force and the high Curie temp. and the magnetic material 1 having the high coercive force and the low Curie temp. is formed on a base body 4. Recording is executed by heating the recording medium to the temp. slightly lower than the Curie temp. of the magnetic material 1 at the time of recording. The coercive force of the magnetic material decreases considerably and the recording current is extremely little at this time. The recording is executed only to the magnetic material under heating if the recording current is set smaller than the recording current to the magnetic material 2. The recording is not executed at all by degaussing the magnetic material 2 at the time of reading when the magnetic material 1 is not recorded. Further, both the magnetic materials are magnetized and the outputs and output waveforms different from the outputs and output waveforms of the magnetic material 1 alone are obtd. if the recording is executed with the large current by using a magnetic head core consisting of 'PB Permalloy(R)', etc. The forgery is prevented by such constitution.

2. 发明专利

JPH03124003A MAGNETIC POWDER, MANUFACTURE THEREOF, MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING METHOD 失效
公开(公告)号：JPH03124003A
公开(公告)日：1991-05-27
申请号：JP26237789
申请日：1989-10-06
申请人： TDK CORP , TOKYO JIKI INSATSU KK
发明人： MORO EIJI , SATO SHIGEO , YONEYAMA TETSUTO , MIMURA SHOHEI , TAKAHASHI HARUYUKI , MAKIMURA ATSUSHI
IPC分类号： G06K19/06 , C09D5/23 , C09D7/12 , G11B5/706 , G11B5/842 , G11B11/10 , G11B11/105 , H01F1/11
摘要： PURPOSE:To acquire a magnetic recording medium of even frequency characteristics which is hard to erase after recorded using a magnetic powder having a good Curie point, high coercive force, high squareness ratio and stable properties by manufacturing and using a magnetic powder whose grain diameter and composition are specific. CONSTITUTION:Required materials are mixed, calcined, and ground by a vibrating mill, etc.; and burnt by an electric furnace, etc. Jet mill grinding is carried out to manufacture a magnetic powder of displacement M-type ferrite in a composition shown by an expression I, which is composed of a grain by 65% or more of an entire whose grain diameter is (0.5 to 5) X average grain diameter. Use of the magnetic powder of good Curie point, high coercive force, high squareness ratio and stable properties realizes a magnetic recording medium having even frequency characteristics which is hard to erase after recorded. In the expression, Me is one or more of Ba, Sr, Pb, Ca; and n, x, y: 4.5 =0, y>=0, x/3+y/4+z/6>=1/6, x/6+y/10+z/11

3. 发明专利

JP2008243967A Powder magnetic core 审中-公开
标题翻译：粉末磁芯
公开(公告)号：JP2008243967A
公开(公告)日：2008-10-09
申请号：JP2007079673
申请日：2007-03-26
申请人： Tdk Corp , Tdk株式会社
发明人： MORO EIJI , SATO SADAKI , SUZUKI TSUNEO
IPC分类号： H01F1/26 , H01F1/147 , H01F27/255
CPC分类号： H01F1/26 , B22F2998/00 , C22C33/0278 , C22C2202/02 , H01F27/255 , H01F41/0246 , B22F1/0062
摘要： PROBLEM TO BE SOLVED: To provide a powder magnetic core which is increased in dielectric strength than ever before, with the magnetic permeability being kept the same as or larger than ever before. SOLUTION: The powder magnetic core contains powder of a magnetic material and binder resin, and satisfies a condition expressed by an expression Vc>E-a×(D×Rm/Dm) 2/3 ×100, where D is the apparent density of the powder magnetic core, E is the existing rate of the magnetic material powder on the surface of the powder magnetic core, Rm is the mass ratio of the magnetic material powder to the powder magnetic core, Dm is the real density of the magnetic material powder, Vc is a predetermined threshold value, and (a) is a predetermined coefficient. A unit of D and Dm is g/cm 3 , a unit of E is %, and Rm is a nondimensional quantity. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种比以往更高的介电强度的粉末磁芯，其磁导率保持与之前相同或更大。解决方案：粉末磁芯包含磁性材料和粘合剂树脂的粉末，并且满足由表达式Vc> Ea×（D×Rm / Dm） 2/3 ×100表示的条件其中D是粉末磁芯的表观密度，E是粉末磁芯表面上的磁性材料粉末的存在速率，Rm是磁性材料粉末与粉末磁芯的质量比，Dm是磁性材料粉末的真实密度Vc为预定阈值，（a）为预定系数。 D和Dm的单位为g / cm 3，SP的单位为％，Rm为无量纲。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2007254814A Fe-Ni-BASED SOFT MAGNETIC ALLOY POWDER, GREEN COMPACT, AND COIL-SEALED DUST CORE 审中-公开
标题翻译：基于Fe-Ni的软磁合金粉末，绿色紧凑型和密封密封芯
公开(公告)号：JP2007254814A
公开(公告)日：2007-10-04
申请号：JP2006080538
申请日：2006-03-23
申请人： Tdk Corp , Tdk株式会社
发明人： MORO EIJI , TOMITA HIROSHI
IPC分类号： B22F1/00 , B22F1/02 , B22F3/00 , B22F9/08 , C22C38/00 , H01F1/20 , H01F27/255
摘要： PROBLEM TO BE SOLVED: To provide Fe-Ni-based soft magnetic alloy powder having high magnetic flux density, high electric resistance and low hardness as well, to provide a green compact, and to provide a coil-sealed dust core.
SOLUTION: The Fe-Ni-based soft magnetic alloy powder for forming the green compact for the coil-sealed dust core has a composition comprising, by weight, 41 to
摘要翻译：要解决的问题为了提供具有高磁通密度，高电阻和低硬度的Fe-Ni系软磁合金粉末，以提供生坯，并提供线圈密封的防尘芯。解决方案：用于形成用于线圈密封的粉芯的生坯的Fe-Ni系软磁合金粉末具有重量比为41〜45％的Ni和1〜5％的添加剂A，以及余量Fe与不可避免的杂质。添加剂A是选自Al，Si，Mn，Mo，Cr和Cu中的至少一种。以这种方式，Fe-Ni系软磁合金粉末的硬度在不降低其磁通密度和电阻的情况下降低，并且其成型性能得到改善。此外，软磁性合金粉末的平均粒径优选控制为≤50μm。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2006210743A Coil inclusion powder magnetic core 审中-公开
标题翻译：线圈包埋粉末磁芯
公开(公告)号：JP2006210743A
公开(公告)日：2006-08-10
申请号：JP2005022397
申请日：2005-01-31
申请人： Tdk Corp , Tdk株式会社
发明人： MORO EIJI , WAKAMATSU JOJI
IPC分类号： H01F1/147 , H01F1/24 , H01F27/255
摘要： PROBLEM TO BE SOLVED: To provide a coil inclusion powder magnetic core having a high magnetic permeability as the coil inclusion powder magnetic core, excellent in a DC superposition performance, and capable of obtaining a further high density. SOLUTION: The coil inclusion powder magnetic core has a powder compact body comprising a ferromagnetic metallic particle coated by an insulating material, and the coil embedded in the powder compact body and with a round conductor on its periphery coated with an insulator. The ferromagnetic metallic particle comprises an Fe-Si-Al-Ni alloy. The Fe-Si-Al-Ni alloy preferably comprises a composition of Si: 3 to 8 wt%, Al: 2 to 5 wt%, Ni: not more than 6 wt% (excluding 0), and the actual remainder Fe. An average particle diameter of the ferromagnetic metallic particle is preferably 1 to 45 μm. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：提供具有高磁导率的线圈夹杂粉末磁芯作为线圈夹杂物磁性磁芯，具有优异的DC叠加性能，并且能够获得更高的密度。解决方案：线圈夹杂粉末磁芯具有包含由绝缘材料涂覆的铁磁金属颗粒的粉末压实体，并且嵌入粉末压实体中的线圈和在其外围涂覆有绝缘体的圆形导体。铁磁金属颗粒包含Fe-Si-Al-Ni合金。 Fe-Si-Al-Ni合金优选包含Si：3〜8重量％，Al：2〜5重量％，Ni：6重量％以下（不含0），实际余量为Fe的组成。铁磁性金属粒子的平均粒径优选为1〜45μm。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JP2003282346A Coil sealed dust core and manufacturing method thereof 有权
标题翻译：线圈密封芯及其制造方法
公开(公告)号：JP2003282346A
公开(公告)日：2003-10-03
申请号：JP2002079044
申请日：2002-03-20
申请人： Tdk Corp , Tdk株式会社
发明人： SATO SADAKI , TAMURA SUMIYOSHI , MORO EIJI , SUZUKI TSUNEO
IPC分类号： B22F7/08 , A61B8/08 , H01F17/04 , H01F41/10
CPC分类号： A61B8/145 , A61B8/08 , A61B8/4483 , Y10T29/4902 , Y10T29/49071 , Y10T29/49073
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method, by which a coil sealed dust core having little fluctuation of the inductance value can be efficiently manufactured, and so forth. SOLUTION: This manufacturing method comprises a process (a) for filling a soft magnetic metal powder composing a green compact 10 including an insulating agent so as to cover a coil 1, and a process (b) for making the soft magnetic metal powder to be compacted in the axial direction of the coil 1, and in the process (b), while keeping a state where the amount of the soft magnetic metal powder filled in the portion corresponding to a winding part with the upper or lower surface of the winding part as a reference is less than the amount of the soft magnetic metal powder filled in the other portion which does not correspond to the winding part, the soft magnetic metal powder is made to be compacted. Hereby, the coil sealed dust core having overall uniform density can be obtained. Since the coil sealed dust core, having overall uniform density, reduces fluctuation of the inductance, a prescribed inductance can be obtained in a stable manner. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种制造方法，通过该方法能够有效地制造电感值的波动小的线圈密封的集尘芯等。解决方案：该制造方法包括用于填充构成包括绝缘剂的生坯10的软磁性金属粉末以覆盖线圈1的方法（a）和用于制造软磁性金属的方法（b）在线圈1的轴向压缩的粉末和（b）的工序，同时保持在与上部或下部表面的卷绕部分对应的部分中填充的软磁性金属粉末的量保持在作为基准的绕组部分小于填充在与卷绕部分不对应的另一部分中的软磁性金属粉末的量，使得软磁性金属粉末被压实。因此，可以获得具有整体均匀密度的线圈密封的集尘芯。由于线圈密封的集尘芯具有整体均匀的密度，所以减小了电感的波动，可以稳定地获得规定的电感。版权所有（C）2004，JPO

7. 发明专利

JP2001006914A DUST CORE AND MANUFACTURE THEREFOR 失效
公开(公告)号：JP2001006914A
公开(公告)日：2001-01-12
申请号：JP17550999
申请日：1999-06-22
申请人： TDK CORP
发明人： MORO EIJI
IPC分类号： H01F1/22 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To raise direct current superposing property under high magnetic field by comprising a step of compression molding of a ferromagnetic metal powder which comprises a high diamagnetic field coefficient powder having particles of relatively high diamagnetic field coefficient and low diamagnetic field coefficient powder having particles of relatively low diamagnetic field coefficient. SOLUTION: A dust core comprises a ferromagnetic metal powder and an insulating material for electrical insulation between particles. The ferromagnetic metal powder includes a high diamagnetic field coefficient powder and a low diamagnetic field coefficient powder, and the former consists of the particles having relatively high diamagnetic field coefficient as compared with the particles constituting the latter. The diamagnetic field coefficients of the particles constituting the individual powders are, not less than 0.23 for the high diamagnetic field coefficient powder and not more than 0.17 for the low diamagnetic field coefficient powder. Further, the existence ratio of the high diamagnetic field coefficient powder is 10-90 wt.% with respect to the total of the high diamagnetic field coefficient powder and the low diamagnetic field coefficient powder.

8. 发明专利

JP2000277314A DUST CORE AND METHOD OF PRODUCING THE SAME 失效
公开(公告)号：JP2000277314A
公开(公告)日：2000-10-06
申请号：JP7842399
申请日：1999-03-23
申请人： TDK CORP
发明人： MORO EIJI , SAITO KATSUMI
IPC分类号： H01F1/147 , H01F1/14 , H01F1/24 , H01F1/26
摘要： PROBLEM TO BE SOLVED: To improve saturation magnetic flux density, loss, and effective permeability in applying direct-current magnetic field by comprising a ferromagnetic metal powder and an insulating layer including isotropic carbon which exist between particles thereof. SOLUTION: A molding is produced through compression molding a mixture, including ferromagnetic metal powder and an insulating material. The molding is annealed so that insulating layers exist between ferromagnetic metal particles. The insulating layer is constituted to include isotropic carbon. In annealing, the isotropic carbon is produced by using a thermosetting resin including at least one of silicone resin, phenol resin and epoxy resin as the insulating layer. Alternatively, the insulating material including the isotropic carbon, and the ferromagnetic metal powder are mixed, molded and then annealed. Thereby, saturation magnetic flux density becomes high, a small loss is achieved, and moreover the direct-current superposition property is made satisfactory.

9. 发明专利

JPH11195520A DUST CORE, FERROMAGNETIC POWDER THEREFOR AND PRODUCTION THEREOF 失效
公开(公告)号：JPH11195520A
公开(公告)日：1999-07-21
申请号：JP36803297
申请日：1997-12-27
申请人： TDK CORP , SHOWA HIGHPOLYMER
发明人： MORO EIJI , OKADA KAZUHIRO , YAMADA TOSHIAKI , YAMAGUCHI NORISHIGE , KITAJIMA HIDEKI
IPC分类号： B22F1/00 , B22F3/00 , H01F1/22 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To enhance the characteristics by adding titanium oxide sol and/or zirconium oxide sol and phenol resin to ferromagnetic metal powder, thereby allowing high temperature annealing. SOLUTION: To form a uniform insulating film having high flux density and high insulation, using a small quantity of ferromagnetic metal powder by adding microparticles of titanium oxide sol and/or zirconium oxide sol dispersed uniformly into a solvent. When phenol resin is added furthermore, molding strength is enhanced and insulation does not deteriorate even if annealing temperature is raised to 800 deg.C or thereabout. Consequently, strains generated at the time of pulverization or molding are released, hysteresis loss is reduced because coercive force of a dust core is decreased, and core loss is reduced because insulation is sustained and eddy current loss is decreased. Furthermore, heat resistance resin is cured through annealing to increase density of a green compact thus enhancing mechanical strength.

10. 发明专利

JPH0974011A DUST CORE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0974011A
公开(公告)日：1997-03-18
申请号：JP23048395
申请日：1995-09-07
申请人： TDK CORP
发明人： MORO EIJI , UMEHARA NAOMICHI
IPC分类号： H01F1/147 , H01F1/24 , H01F3/08
摘要： PROBLEM TO BE SOLVED: To provide a core which is small in size and can be used at high frequencies by specifying the oxygen content of each alloy powder particle and oxydizing the surfaces of the particles. SOLUTION: Fe-Si-Al alloy powder is manufactured by melting iron, silicon or ferrosilicon, and aluminum or ferroaluminum and then rapidly quenching the melted materials by the gas atomizing method or high-speed quenching method in an inactive atmosphere. The oxygen content of each particle of the alloy powder is 400ppm or below and the surfaces of the particles are oxidized. Furthermore, the obtained Fe-Si-Al alloy powder is molded and then is annealed at temperatures 500-800 deg.C in an inactive atmosphere and then is annealed again at temperatures 400-700 deg.C in an oxydized atmosphere.

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