Yoshihito Yoshizawa
Yoshihito Yoshizawa, Fukaya-Shi JP
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20090266448 | NANO-CRYSTALLINE, MAGNETIC ALLOY, ITS PRODUCTION METHOD, ALLOY RIBBON AND MAGNETIC PART - A magnetic alloy having a composition represented by the general formula of Fe | 10-29-2009 |
20110085931 | NANO-CRYSTALLINE, MAGNETIC ALLOY, ITS PRODUCTION METHOD, ALLOY RIBBON AND MAGNETIC PART - A magnetic alloy having a composition represented by the general formula of Fe | 04-14-2011 |
20110108167 | NANO-CRYSTALLINE, MAGNETIC ALLOY, ITS PRODUCTION METHOD, ALLOY RIBBON AND MAGNETIC PART - A magnetic alloy having a composition represented by the general formula of Fe | 05-12-2011 |
Yoshihito Yoshizawa, Kumagaya-Shi JP
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20100040503 | MAGNETIC ALLOY, AMORPHOUS ALLOY RIBBON, AND MAGNETIC PART - A soft magnetic alloy that in an FeCo nanocrystal soft magnetic material, exhibits a high saturation magnetic flux density of 1.85 T or more, and that ensures prolonged nozzle life and easy ribbon production; an amorphous alloy ribbon for use in production thereof; and magnetic parts utilizing the soft magnetic alloy. The soft magnetic alloy has the composition of the formula Fe | 02-18-2010 |
20100108196 | SOFT MAGNETIC RIBBON, MAGNETIC CORE, MAGNETIC PART AND PROCESS FOR PRODUCING SOFT MAGNETIC RIBBON - A soft magnetic ribbon that especially in a relatively low magnetic field region of 500 A/m or less, is high in the squareness of magnetic flux density-magnetization curve. There is disclosed a soft magnetic ribbon of 100 μm or less thickness comprising a parent phase structure in which by volume ratio, 30% or more of crystal grains of 60 nm or less (not including 0) crystal grain diameter are dispersed in an amorphous phase and comprising an amorphous layer disposed on the surface side of the parent phase structure. Preferably, the soft magnetic ribbon is represented by the composition formula Fe | 05-06-2010 |
20100230010 | THIN STRIP OF AMORPHOUS ALLOY, NANOCRYSTAL SOFT MAGNETIC ALLOY, AND MAGNETIC CORE - Disclosed are a thin strip of an amorphous alloy having excellent workability, a nanocrystalline soft magnetic alloy which can stably provide good magnetic properties, and a magnetic core using the nanocrystalline soft magnetic alloy. The thin strip of an amorphous alloy is characterized in that the thin strip is formed of an alloy having a composition represented by Fe | 09-16-2010 |
Yoshihito Yoshizawa, Kumagaya JP
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20100084056 | SOFT MAGNETIC THIN STRIP, PROCESS FOR PRODUCTION OF THE SAME, MAGNETIC PARTS, AND AMORPHOUS THIN STRIP - The invention provides a soft magnetic thin strip which contains nanoscale fine grains and exhibits a high saturation magnetic flux density and excellent soft magnetic characteristics; a process for production of the same; magnetic parts; and an amorphous thin strip to be used in the production. In the invention, an amorphous thin strip is used, which is represented by the composition formula: Fe | 04-08-2010 |
20100098576 | IRON-BASED SOFT MAGNETIC ALLOY, THIN RIBBON OF AMORPHOUS ALLOY, AND MAGNETIC PART - An iron-based soft magnetic alloy which is for use in various transformers, various choke coils, noise suppression measures, power supply parts, laser power supplies, pulsed-power magnetic parts for accelerators, various motors, various generators, magnetic shields, antennas, sensors, etc.; a thin ribbon of an amorphous alloy for producing the magnetic alloy; and a magnetic part comprising the magnetic alloy. The magnetic alloy comprises, in terms of at. %, copper in an amount (x) satisfying 0.1≦x≦3, boron in an amount (y) satisfying 10≦y≦20, and iron and impurities as the remainder. It contains, in terms of mass %, the following impurities: up to 0.01% aluminum, 0.001-0.05% sulfur, 0.01-0.5% manganese, 0.001-0.1% nitrogen, and up to 0.1% oxygen. The magnetic alloy has a structure at least part of which comprises a crystal phase having a crystal grain diameter of 60 nm or smaller (excluding 0). | 04-22-2010 |
Yoshihito Yoshizawa, Tokyo JP
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20090189728 | AMORPHOUS TRANSFORMER FOR ELECTRIC POWER SUPPLY - This invention provides an amorphous transformer for electric power supply, using a magnetic core formed of an amorphous alloy material, which, as compared with the conventional amorphous alloy material, has a lower annealing temperature and a higher level of magnetic properties. The amorphous transformer for electric power supply is provided with a magnetic core of a thin band of an amorphous alloy and a winding wire. The iron core has been annealed under such conditions that the iron core center part temperature during annealing after iron core molding is 300 to 340° C. and the holding time is not less than 0.5 hr. Further, for the iron core, the magnetic field intensity during annealing after the iron core molding is not less than 800 A/m. | 07-30-2009 |
20110203705 | METHOD OF PRODUCING AN AMORPHOUS TRANSFORMER FOR ELECTRIC POWER SUPPLY - This method of producing an amorphous transformer for electric power supply comprises forming and shaping an iron core by laminating amorphous alloy thin bands and forming a winding, subjecting the iron core, after forming and shaping, to an annealing treatment in which a temperature of a center portion of the iron core during annealing is 300 to 340° C. and a holding time is not less than 0.5 hr, and applying a magnetic field having a strength of not less than 800 A/m to the iron core while subjecting the iron core, after forming and shaping, to the annealing treatment. | 08-25-2011 |
Yoshihito Yoshizawa, Saitama JP
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20090065100 | Amorphous Alloy Ribbon, Nanocrystalline Soft Magnetic Alloy and Magnetic Core Consisting of Nanocrystalline Soft Magnetic Alloy - Even if produced from a broad amorphous alloy ribbon, a nano crystal soft magnetic alloy, a magnetic core made of a nano crystal soft magnetic alloy, and the amorphous alloy ribbon for a nano crystal soft magnetic alloys which has the excellent alternate magnetic property, the small dispersion, the excellent temporal stability in high temperature, the excellent mass productivity can be provided. | 03-12-2009 |
20090184705 | Magnetic Core for Current Transformer, Current Transformer, and Watt-Hour Meter - A magnetic core for a current transformer, and a current transformer and a watt hour meter used thereof, which is preferred the detection of a alternate current with a large asymmetrical waveform and a alternate current which a direct current is superimposed are realized. A magnetic core for a current transformer comprising the composition represented by the general formula: Fe | 07-23-2009 |
Yoshihito Yoshizawa, Fukaya JP
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20090145524 | Magnetic Core and Applied Product Making Use Of The Same - A magnetic core making use of an Fe-based amorphous alloy ribbon that simultaneously attains miniaturization and noise reduction through realization of high B | 06-11-2009 |
Yoshihito Yoshizawa, Osaka JP
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20110272065 | SOFT MAGNETIC ALLOY RIBBON AND ITS PRODUCTION METHOD, AND MAGNETIC DEVICE HAVING SOFT MAGNETIC ALLOY RIBBON - A method for producing a soft magnetic alloy ribbon having a composition represented by Fe | 11-10-2011 |
20120318412 | PRIMARY ULTRAFINE-CRYSTALLINE ALLOY, NANO-CRYSTALLINE, SOFT MAGNETIC ALLOY AND ITS PRODUCTION METHOD, AND MAGNETIC DEVICE FORMED BY NANO-CRYSTALLINE, SOFT MAGNETIC ALLOY - A primary ultrafine-crystalline alloy having a composition represented by the general formula: Fe | 12-20-2012 |
Yoshihito Yoshizawa, Shimamoto JP
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20110294012 | ANODE FOR LITHIUM-ION RECHARGEABLE BATTERY AND LITHIUM-ION RECHARGEABLE BATTERY INCLUDING SAME - It is an objective of the present invention to provide a lithium-ion rechargeable battery anode which can control the volume change of a primary particle of a negative-electrode active material other than a carbon-based material and that can prevent cracks due to stress caused by the volume change from occurring and extending. There is provided an anode for a lithium-ion rechargeable battery including a primary particle of a negative-electrode active material, a conductive material, and a binder, the negative-electrode active material including at least one of silicon and tin, and at least one element selected from elements that do not chemically react with lithium, in which holes are present both in an inner core region in the central region of the primary particle of the negative-electrode active material and in a periphery region that covers the inner core region. | 12-01-2011 |
Yoshihito Yoshizawa, Mishima-Gun JP
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20120154084 | SOFT-MAGNETIC, AMORPHOUS ALLOY RIBBON AND ITS PRODUCTION METHOD, AND MAGNETIC CORE CONSTITUTED THEREBY - A soft-magnetic, amorphous alloy ribbon produced by a rapid quenching method, having transverse lines of recesses formed on its surface by laser beams with predetermined longitudinal intervals, with a doughnut-shaped projection formed around each recess; doughnut-shaped projections having smooth surfaces substantially free from splashes of the alloy melted by the irradiation of laser beams, and a height t | 06-21-2012 |
20130314198 | RAPIDLY QUENCHED FE-BASED SOFT-MAGNETIC ALLOY RIBBON AND ITS PRODUCTION METHOD AND CORE - A rapidly quenched Fe-based soft-magnetic alloy ribbon having wave-like undulations on a free surface, the wave-like undulations having transverse troughs arranged at substantially constant intervals in a longitudinal direction, and the troughs having an average amplitude D of 20 mm or less, is produced by a method comprising (a) keeping a transverse temperature distribution in a melt nozzle within ±15° C. to have as small a temperature distribution as possible in a melt paddle of the alloy, and (b) forming numerous fine linear scratches on a cooling roll surface by a wire brush, thereby providing a ground surface of the cooling roll with an arithmetical mean (average) roughness Ra of 0.1-1 μm and a maximum roughness depth Rmax of 0.5-10 μm. | 11-28-2013 |
20140191832 | PRIMARY ULTRAFINE-CRYSTALLINE ALLOY RIBBON AND ITS CUTTING METHOD, AND NANO-CRYSTALLINE, SOFT MAGNETIC ALLOY RIBBON AND MAGNETIC DEVICE USING IT - A method for cutting a primary ultrafine-crystalline alloy ribbon having a structure in which ultrafine crystal grains having an average grain size of 30 nm or less are dispersed in a proportion of 5-30% by volume in an amorphous matrix, comprising placing the ribbon on a soft base deformable to an acute angle by local pressing, bringing a cutter blade into horizontal contact with a surface of the ribbon, and pressing the cutter to the ribbon to apply uniform pressure thereto, thereby bending the ribbon along a cutter blade edge to brittly fracture-cut the ribbon. | 07-10-2014 |