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| Number | Title | Issue Date |
| 8038808 | Flat soft magnetic material and process for its production A flat soft magnetic material to be used for a noise-suppressing magnetic sheet, wherein the 50% particle size D50 (μm), coercive force Hc (A/m) and bulk density BD (Mg/m3) of the flat soft magnetic material satisfy the following formula (1). ... | 10/18/2011 |
| 7854807 | Magnetic metal powder suitable for use in magnetic recording media and method of manufacturing the powder A metal magnetic powder for a magnetic recording medium is provided whose particles have a metal magnetic phase, composed mainly of Fe or Fe plus Co, and an oxide layer, wherein the average major axis length of the powder particles is 10-50 nm, the average particle ... | 12/21/2010 |
| 7662242 | Non-oriented electrical steel superior in core loss Non-oriented electrical steel sheet superior in core loss characterized by containing, by mass %, C: 0.01% or less, Si: 0.1% to 7.0%, Al: 0.1% to 3.0%, Mn: 0.1% to 2.0%, N: 0.005% or less, Ti: 0.02% or less, REM: 0.05% or less, S: 0.005% or less, O: 0.005% or less, ... | 02/16/2010 |
| 7608154 | Nonoriented electrical steel sheet excellent in core loss A nonoriented electrical steel sheet excellent in core loss comprising copper sulfides with a sphere-equivalent radius of 100 nm or less, wherein the number density of the copper sulfides is less than 1×1010 [inclusions/mm3]. Preferably, the p... | 10/27/2009 |
| 7270718 | Method for manufacturing a soft magnetic powder material The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing ... | 09/18/2007 |
| 7195680 | Soft magnetic alloy for clock-making The invention relates to a soft magnetic alloy with the following composition in wt. %: 28%≦Ni≦34%, 0%≦Co≦4%, 0%≦Cu≦4%, 1%≦Cr, 0%≦Mo≦8%, 0%≦Nb≦1%, 0%≦Mn≦2%, 0%≦V≦5%, 0%≦W≦5%, 0%≦Si≦4%, 0%≦Al≦4%, 0%≦C≦0.4%, optionally one... | 03/27/2007 |
| 7011139 | Method of continuous casting non-oriented electrical steel strip Non-oriented electrical steels are widely used as the magnetic core material in a variety of electrical machinery and devices, particularly in motors where low core loss and high magnetic permeability in all directions of the strip are desired. A method for producin... | 03/14/2006 |
| 6852174 | Powder magnetic core There is disclosed a powder magnetic core in which a permeability does not easily drop even when an applied magnetic field intensifies, comprising: a bulk body containing a main component of a powder of an Fe-base alloy having a soft magnetic property, and the balan... | 02/08/2005 |
| 6803118 | Marker for use in a magnetic anti-theft security system A semi-hard magnetic alloy for activation strips in magnetic anti-theft security systems is disclosed that contains 8 to 25 weight % Ni, 1.0 to 4.5 weight % Al, 0.5 to 3 weight % Ti and the balance iron. ... | 10/12/2004 |
| 6723914 | Composite magnetic tape There is provided a composite magnetic tape which can be easily applied irrespective of the inside or outside of an electronic equipment, prevent radiation of undesired electromagnetic waves from the inside of the equipment and reflection into the inside of the equi... | 04/20/2004 |
| 6689490 | Display element for employment in a magnetic anti-theft security system Display Element for Employment in a Magnetic Anti-theft Security System A semi-hard magnetic alloy for activation strips in magnetic anti-theft security systems is disclosed that contains 8 to 25 weight % Ni, 1.5 to 4.5 weight % Al, 0.5 to 3 weight % Ti a... | 02/10/2004 |
| 6663981 | Marker for use in a magnetic anti-theft security system and method for marking the marker A marker for use in a magnetic anti-theft security system has an amorphous ferromagnetic alloy alarm strip and at least one activation strip. The semi-hard magnetic alloy for the activation strip contains 8 to 25 weight % Ni, 1.5 to 4.5 weight % Al, 0.5 t... | 12/16/2003 |
| 6599375 | Composite magnetic body, and electromagnetic interference suppressing body using the same A composite magnetic body 1, comprising a soft magnetic powder (2) and a binding agent (3), in which the specific surface area of the soft magnetic powder (2) is 0.1-3 m2 /g. The surface state of the soft magnetic powder contained in the compos... | 07/29/2003 |
| 6579383 | Powder magnetic core A powder magnetic core mainly comprises a soft magnetic powder which contains: 0.5 to 15% by mass of Si; 10% by mass or less of Al; and the balance of Fe and unavoidable impurities. The powder has an apparent density/true density falling within in a range... | 06/17/2003 |
| 6312531 | Magnetic composite article and manufacturing method of the same and soft magnetic powder of Fe-Al-Si system alloy used in the composite article Soft magnetic powder of Fe--Al--Si system of which magnetostrictive constant λ takes a positive value at the room temperature is employed to produce a magnetic composite article so that a temperature characteristic of core-loss of the article takes a neg... | 11/06/2001 |
| 6290783 | Non-oriented electromagnetic steel sheet having excellent magnetic properties after stress relief annealing A finish annealed non-oriented electromagnetic steel sheet includes about 0.01 wt % or less of C, greater than about 1.0 wt % and at most about 3.5 wt % of Si, at least about 0.6 wt % and at most about 3.0 wt % of Al, at least about 0.1 wt % and at most a... | 09/18/2001 |
| 6255005 | Composite magnetic member, method of producing ferromagnetic portion of same, and method of forming non-magnetic portion of same Provided is a composite magnetic member made of a single material combining a ferromagnetic portion and a non-magnetic portion in which the ferromagnetic portion has better soft magnetism than conventional members and the non-magnetic portion has the same... | 07/03/2001 |
| 6162306 | Electromagnetic steel sheet having excellent high-frequency magnetic properities and method Electromagnetic steel sheets which contain Cr in an amount of from about 1.5 to 20% by weight and Si in an amount of from about 2.5 to 10% by weight, while having a total amount of C and N of not larger than about 100 ppm by weight, and which has a specif... | 12/19/2000 |
| 6129790 | Low core loss, well-bonded soft magnetic A ferromagnetic powder comprising ferromagnetic particles coated with a material that does not degrade at temperatures above 150° C. and permits adjacent particles to strongly bind together after compaction such that parts made from the ferromagnetic pow... | 10/10/2000 |
| 6033792 | Soft magnetic thin film, and magnetic head and magnetic recording device using the same A recording head for recording data onto a recording medium is provided with a thin film formed of the following compound Fe100-a-b-c Xa Yb Zc, wherein X is at least one element selected from the group consistin... | 03/07/2000 |
| 5919319 | Iron-cobalt alloy, process for manufacturing a strip made of iron-cobalt alloy, and strip obtained An Iron-cobalt alloy, whose chemical composition contains, by weight: 5%ࣘCoࣘ40% 0%ࣘSiࣘ5% 0.2%ࣘAlࣘ5% 0.5%ࣘSi+Alࣘ5% the balance being iron and impurities resulting from the smelting. Process for manufacturing a strip and strip obtained.... | 07/06/1999 |
| 5873955 | Soft magnetic thin film, and magnetic head and magnetic recording device using the same A recording head for recording data onto a recording medium is provided with a thin film formed of the following compound Fe100-a-b-c Xa Yb Zc, wherein X is at least one element selected from the group consistin... | 02/23/1999 |
| 5858548 | Soft magnetic thin film, and magnetic head and magnetic recording device using the same Corrosion resistance of a magnetic film composed mainly of Fe is maintained while keeping its magnetic properties. A magnetic head having a magnetic core is formed in part of the magnetic thin film, which contains not only an alloy of Fe-metalloid series ... | 01/12/1999 |
| 5821000 | Composite magnetic member and process for producing the member A composite magnetic member formed of a single material having a ferromagnetic section with high soft magnetism and a non-magnetic or the like section with sufficiently low magnetic (feebly magnetized or non-magnetic) and sufficient low MS temperature and... | 10/13/1998 |
| 5730810 | Non-oriented electromagnetic steel sheet with low iron loss after stress relief annealing, and core of motor or transformer In a non-oriented electromagnetic steel sheet including about 0.01 wt % or less of C, about 1.0 wt % or less of Si, Mn in a range of about 0.1 wt % to 1.5 wt %, Al in a range of about 0.2 wt % to 1.5 wt %; the steel sheet having a critical amount of about... | 03/24/1998 |
| 5720829 | Maraging type hot work implement or tool and method of manufacture thereof A maraging type magnetic hot work implement, such as a forging die, or a tool, such as a turbine blade, having Ni3 Mo, Ni3 Al and, preferably, Ni3 Ti strengthening precipitates dispersed uniformly, and being substantially ... | 02/24/1998 |
| 5651841 | Powder magnetic core A powder magnetic core having reduced core losses and increased mechanical strength is provided at low costs. The core is obtained by compressing a ferromagnetic metal powder and an insulating agent and then annealing the compressed body. The ferromagneti... | 07/29/1997 |
| 5580399 | Magnetic recording medium In a magnetic recording medium of the coating type using a metal magnetic powder, for the purpose of improving switching field distribution (SFD) and electromagnetic properties, there is used a metal magnetic powder based on iron and containing Al and/or ... | 12/03/1996 |
| 5565272 | Grain oriented silicon steel sheet having excellent primary film properties A grain oriented silicon steel sheet having excellent primary glass film property and magnetic property, comprising 2.0 to 5.0% by weight of Si, wherein a primary glass film formed during secondary recrystallization annealing is composed mainly of forster... | 10/15/1996 |
| 5411605 | Soft magnetic steel material having excellent DC magnetization properties and corrosion resistance and a method of manufacturing the same This invention is intended for providing a soft magnetic steel material having excellent DC magnetization properties and corrosion resistance, and capable of being manufactured at a low cost, and a method of manufacturing the same. The soft magnetic steel... | 05/02/1995 |
| 5306356 | Magnetic sheet metal obtained from hot-rolled strip steel containing, in particular, iron, silicon and aluminum Magnetic sheet metal obtained from hot-rolled strip steel containing, in particular, iron, silicon and aluminium and forming part of a family of sheet metals having orientated grains, characterized in that its composition is as follows: silicon less than ... | 04/26/1994 |
| 5207841 | Soft magnetic powder and magnetic shield composition Soft magnetic powder comprising flat soft magnetic particles of an alloy having a composition defined and encompassed by polygon ABCDE in a Fe-Si-Cr ternary composition diagram of FIG. 1 or polygon JKLMN in a Fe-Si-Al ternary composition diagram of FIG. 4... | 05/04/1993 |
| 5156922 | Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same Disclosed herein are acicular magnetic iron based alloy particles for magnetic recording, containing 1.5 to 10 mol % of B based on Fe (calculated as B) and 1.5 to 10 mol % of Co based on Fe (calculated as Co) in the vicinity of the surfaces of said partic... | 10/20/1992 |
| 5133814 | Soft magnetic thin film A novel soft magnetic amorphous alloy thin film which, on account of the composition of the film consisting in a combination of a transition metal, a metalloid or semiconducting element, namely B, C or Si and an oxide derived from the starting material, i... | 07/28/1992 |
| 5073214 | Magnetic material for a magnetic head A magnetic material having an Fe-Si-Al type magnetic alloy with addition of one or more additive elements selected from a group consisting of Be, Mg, Ca, Sr, Ba, Sc, Y, Nb, Ta and Hf. The material has been subjected to an oxidation heat-treatment so as to... | 12/17/1991 |
| 4957699 | Soft magnetic Cr-Al steel The present invention relates to a soft magnetic steel improved in electric resistance, coercive force, magnetic flux density, magnetic response, cold forgeability, machinability, and corrosion resistance, which is characterized by the composition contain... | 09/18/1990 |
| 4946746 | Novel metal fiber and process for producing the same A metal fiber having unidirectional dendritic texture which is an assembly of a group of dendrites wherein primary arms have grown at angle of within 20° relative to the metal fiber axis, diameter of said fiber being not greater than 100 μm. There is al... | 08/07/1990 |
| 4762755 | Ferromagnetic material and a magnetic head using the same material A ferromagnetic material is composed of an iron alloy which contains 2 to 12% by weight of silicon and 5 to 25% by weight of at least one element selected from the group consisting of ruthenium, rhodium, palladium, iridium, platinum, gold and silver. This... | 08/09/1988 |
| 4735865 | Magnetic head core Disclosed is a magnetic head core material having very high corrosion resistance even under severe conditions and a method for preparing the same. The material consists of 3 to 6 wt % of aluminum, 7 to 12 wt % of silicon, not more than 3 wt % of chromium ... | 04/05/1988 |
| 4671828 | Magnetic thin film A magnetic thin film consisting essentially of Fe, Al and Si and further containing oxygen has high magnetic permeability and high hardness without lowering the magnetic properties such as saturation magnetic flux density or coercive force. The magnetic t... | 06/09/1987 |
