Free Metal Or Alloy Containing Patents (Class 252/62.55)
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Publication number: 20100264358Abstract: Provided is a method for in-situ coating a substrate or matrix with magnetic metal nanoparticles. A metal salt, which may be organic or inorganic, is introduced into a solution of liquid polyol. In the presence of mechanical stirring and heat, a reduction process occurs wherein the magnetic metal nanoparticles precipitate out of solution and deposit or attach to one or more surfaces of the substrate. The concentration of reaction precursors, combined with the polyol, may be varied to control the size and shape of the magnetic nanoparticles.Type: ApplicationFiled: April 15, 2009Publication date: October 21, 2010Inventors: Julia J. Mack, Brian N. Cox, Vivek Mehrotra, Ten-Luen T. Liao, Rahul Ganguli
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Patent number: 7815820Abstract: An electromagnetic interference shielding composite is provided. The electromagnetic interference shielding composite comprises: a high permittivity polymer having a permittivity of at least about 5; a plurality of magnetic particles dispersed within the high permittivity polymer; and a plurality of dielectric particles dispersed within the high permittivity polymer. In another embodiment, an article comprising a device susceptible to electromagnetic radiation and a shielding material disposed to shield the device from electromagnetic radiation is provided. The shielding material comprises, a high permittivity polymer; a plurality of magnetic particles dispersed within the high permittivity polymer; and plurality of dielectric particles dispersed within the high permittivity polymer.Type: GrantFiled: October 18, 2007Date of Patent: October 19, 2010Assignee: General Electric CompanyInventors: Daniel Qi Tan, Yang Cao, Patricia Chapman Irwin
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Publication number: 20100243947Abstract: It is an object to provide a method for producing magnetic microparticles, which produces monodispersed magnetic microparticles, causes no clogging with a product due to self-dischargeability, requires no great pressure, and is excellent in productivity. In the method for producing magnetic microparticles, at least two fluids are used, and at least one kind of the fluids is a fluid containing at least one kind of magnetic raw material, and at least one kind of the fluids other than the above fluid is a fluid containing at least one kind of a magnetic microparticles-separating agent, and the respective fluids join together in a thin film fluid formed between two processing surfaces arranged to be opposite to each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other, whereby magnetic microparticles are separated in the thin film fluid to obtain the magnetic microparticles.Type: ApplicationFiled: September 11, 2008Publication date: September 30, 2010Inventor: Masakazu Enomura
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Publication number: 20100243946Abstract: A method to make a high resistivity permanent magnetic material comprising a non-conductive phase and a permanent magnetic phase microstructure, is disclosed. The method comprises the steps of, (a) disposing at least one layer comprising a non-conductive powder and at least one layer comprising a permanent magnetic powder adjacent to each other to obtain a multilayer, (b) compressing the multilayer, and (c) sintering the multilayer. A method to make a high resistivity soft magnetic material comprising a microstructure comprising a bulk metallic glass phase and a soft magnetic crystalline metal phase, is also disclosed.Type: ApplicationFiled: March 31, 2009Publication date: September 30, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Francis Johnson, Ayman Mohamed Fawzi El-Refaie, Lembit Salasoo, Venkat Subramaniam Venkataramani, Thomas Robert Raber
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Publication number: 20100237272Abstract: A method is disclosed for making semiconductor films from a eutectic alloy comprising a metal and a semiconductor. Through heterogeneous nucleation said film is deposited at a deposition temperature on relatively inexpensive buffered substrates, such as glass. Specifically said film is vapor deposited at a fixed temperature in said deposition temperature where said deposition temperature is above a eutectic temperature of said eutectic alloy and below a temperature at which the substrate softens. Such films could have widespread application in photovoltaic and display technologies.Type: ApplicationFiled: May 5, 2010Publication date: September 23, 2010Inventors: Praveen Chaudhari, Karin Chaudhari, Ashok Chaudhari, Pia Chaudhari
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Patent number: 7800271Abstract: The sintered magnet and the rotating machine equipped with the same are disclosed. The sintered magnet includes crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or oxyfluoride compound layer containing at least one element selected from an alkali metal element, an alkali earth metal element, and a rare earth element. The layer is formed inside some of the crystal grains or in a part of a grain boundary part. An oxyfluoride compound or fluoride compound layer containing carbon in a stratified form is formed on an outermost surface of the crystal grains. The fluoride compound or oxyfluoride compound layer has a concentration gradient of carbon, contains at least one light rare earth element and at least one heavy rare earth element. The heavy rare earth element has a concentration lower than that of the light rare earth element.Type: GrantFiled: January 28, 2009Date of Patent: September 21, 2010Assignee: Hitachi, Ltd.Inventors: Matahiro Komuro, Yuichi Satsu, Yutaka Matsunobu, Takashi Yasuhara
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Publication number: 20100230630Abstract: To provide ferrite magnetic powders for bond magnet capable of surely suppressing residual hexavalent chrome, being an environmental load substance, having no adverse influence on the magnetic characteristics, which is an obstacle in use, and without damaging productivity and at a low cost. The method includes the steps of obtaining sintered powders by sintering raw material powders; wet-pulverizing the sintered powders; wet-cleaning the sintered powders; and annealing the cleaned sintered powders, wherein in the step of the wet-pulverization and in the step of wet-cleaning, generation of the hexavalent chrome, being an environmental load substance, is suppressed by performing the pulverization and cleaning while maintaining pH of a dispersion solvent at 8.5 or less, at the time of pulverization and cleaning.Type: ApplicationFiled: March 6, 2007Publication date: September 16, 2010Applicants: DOWA F-TEC CO., LTD., DOWA ELECTRONICS MATERIALS CO., LTD.Inventors: Shuichi Kohayashi, Hiroya Ikeda, Hideki Katayama, Keisuke Ayabe
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Publication number: 20100227187Abstract: A novel solution route has been developed that after heat-treatment to 500-600° C. under inert atmosphere, yields highly porous composites of nano-sized metal (Ni) particle inclusions in ceramics (Al2O3). Metal loadings could be made from <1% to >95% Ni. The metal inclusion sizes in the Ni—Al2O3 system with the 10 atom % Ni sample were 4-7 nm, while for the 75 atom % Ni sample they were 5-8 nm. It was shown that the 10 atom % Ni sample could be used as a catalyst for the conversion of CO2 and CH4 in the temperature range 550-700° C., while higher temperatures led to growth of the Ni particles and carbon poisoning over time. The solution routes could also be deposited as thin dense films containing <10 nm Ni particles. Such films with high Ni-particle loadings deposited on aluminium substrates have shown very good solar heat absorber proficiency and provide good substrates for carbon tube growth.Type: ApplicationFiled: May 21, 2010Publication date: September 9, 2010Applicant: SUNSTRIP ABInventors: GUNNAR WESTIN, Annika Pohl, Asa Ekstrand
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Publication number: 20100224822Abstract: The present invention relates to ferromagnetic powders with an electrically insulating layer on iron particles intended for the manufacture of components having improved soft magnetic properties at low and medium frequencies. The invention comprises an iron powder coated with a dielectric insulating layer comprising boron bearing compounds to form an insulated ferromagnetic powder. The present invention also relates to a method of making these insulated ferromagnetic powders. The present invention further relates to a method of synthesizing a product made from insulated ferromagnetic powders via a post-heat treatment at a moderate temperature (300° C. to 700° C.), to form a glass-like coating which acts as an electrical insulator. A preferred embodiment of the present invention is obtained when small amounts of alkali bearing compounds are added to the precursors to modify the coating chemistry and significantly increase the electrical resistivity after heat treatment.Type: ApplicationFiled: March 5, 2009Publication date: September 9, 2010Applicant: Quebec Metal Powders, Ltd.Inventors: Guillem Vachon, Claude Gelinas
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Publication number: 20100193727Abstract: A method of functionalizing nano-carbon materials with a diameter less than 1 ?m, comprising: contacting the nano-carbon materials with a free radical generating compound such as azo-compound in an organic solvent under an inert gas atmosphere, thereby obtaining nano-carbon materials with functional groups thereon. The physical and chemical properties of the nano-carbon materials can be modified through the aforementioned method.Type: ApplicationFiled: December 27, 2006Publication date: August 5, 2010Inventors: Chrong-Ching Lee, Kuo-Chen Shih, Mei Hua Wang, Sui-Wen Ho, Shu-Jiuan Huang
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Publication number: 20100193726Abstract: A soft magnetic material includes a plurality of composite magnetic particles (30) each including an iron-based particle (10) containing iron and an insulating coating film (20) surrounding a surface of the iron-based particle (10). The insulating coating film contains an organic group derived from an organic acid having at least one substance selected from the group consisting of titanium, aluminum, silicon, calcium, magnesium, vanadium, chromium, strontium, and zirconium. The at least one substance in the insulating coating film (20) is bonded to iron in the iron-based particles (10) through the organic group derived from the organic acid in the insulating coating film (20). Furthermore, a method for producing a soft magnetic material includes the steps of preparing the iron-based particles (10) containing iron and forming the insulating coating film (20) surrounding a surface of each of the iron-based particles (10).Type: ApplicationFiled: August 26, 2008Publication date: August 5, 2010Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Toru Maeda, Kazushi Kusawake
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Patent number: 7767034Abstract: A soft magnetic material is a soft magnetic material including a composite magnetic particle (30) having a metal magnetic particle (10) mainly composed of Fe and an insulating coating (20) covering metal magnetic particle (10), and insulating coating (20) contains an iron phosphate compound and an aluminum phosphate compound. The atomic ratio of Fe contained in a contact surface of insulating coating (20) in contact with metal magnetic particle (10) is larger than the atomic ratio of Fe contained in the surface of insulating coating (20). The atomic ratio of Al contained in the contact surface of insulating coating (20) in contact with metal magnetic particle (10) is smaller than the atomic ratio of Al contained in the surface of insulating coating (20). Thus, iron loss can be reduced.Type: GrantFiled: September 29, 2005Date of Patent: August 3, 2010Assignees: Sumitomo Electric Industries, Ltd., Toda Kogyo Corp.Inventors: Toru Maeda, Naoto Igarashi, Haruhisa Toyoda, Hirokazu Kugai, Kazuyuki Hayashi, Hiroko Morii, Seiji Ishitani
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Patent number: 7763094Abstract: A precursor particle having a particle size of 10 nm or more and 1 ?m or less, and comprising a first compound selected from an alkoxide, a hydroxide, a sulfate, a nitrate, a carbonate, or a carboxylate of magnetic metal containing at least one metal of Fe and Co, and a second compound selected from an alkoxide or a hydroxide, a sulfate, a nitrate, a carbonate, or a carboxylate of a metal element for forming an oxide, is prepared. Then the precursor particle is heated in a reducing atmosphere to form an insulating particle made of an oxide of the metal element by decomposing the second compound, and to precipitate a particle of the magnetic metal in the insulating particle at a particle size of 1 nm or more and 100 nm or less, thereby manufacturing a high frequency magnetic material.Type: GrantFiled: July 23, 2007Date of Patent: July 27, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tomohiro Suetsuna, Seiichi Suenaga, Kouichi Harada, Maki Yonetsu
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Publication number: 20100181522Abstract: This invention relates to a magnetic composite powder, a method of preparing the same and an electromagnetic noise suppressing film comprising the same. The magnetic composite powder and the electromagnetic noise suppressing film can effectively suppress unwanted electromagnetic waves emitted by various parts of an advanced digital device having high performance characteristics in terms of speed, frequency and functionality.Type: ApplicationFiled: October 2, 2009Publication date: July 22, 2010Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang Woo KIM, Ji Hea Park, Yoon Bae Kim
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Publication number: 20100171064Abstract: A nanoparticle for conductive ink including a ferromagnetic core and a conductive layer surrounding the ferromagnetic core. The ferromagnetic core is 5 to 40 parts by weight, per 100 parts by weight of the nanoparticles. The conductive ink provides electrical reliability by allowing a uniform distribution of nanoparticles in ejected ink and prevents the coffee stain phenomenon and migration.Type: ApplicationFiled: August 23, 2006Publication date: July 8, 2010Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: In-Keun Shim, Jae-Woo Joung
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Publication number: 20100163778Abstract: The present invention provides a simple method for introducing magnetic particles into a polymer for further preparing a magnetic polymer, the method using the capability of polymer to absorb Fe3+ and other divalent metal ions M2+, adding alkali immediately each time after absorbing Fe3+ or M2+, thereby generating hydrated oxide of the Fe3+ and hydrated oxide of the divalent metal ions in sequence inside the polymer, and then heating, so that the hydrated oxide of the Fe3+ and the hydrated oxide of the divalent metal ions are transformed into magnetic particles MFexOy, where M may be Fe2+, Zn2+, Mg2+, Cu2+, Ca2+, Ba2+, Sr2+, Ni2+, Co2+, Mn2+ and the like, and x=1.0˜2.0; y=3.0˜4.0. Compared with the prior art method, the present one is simpler, wider in application, and more operable.Type: ApplicationFiled: May 18, 2007Publication date: July 1, 2010Applicant: BEIJING DINGGUOCHANGSHENG BIOTECH, CO. LTD.Inventors: Congyun Zhang, Weidong Zhou
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Publication number: 20100159244Abstract: The present invention relates to a hexagonal boron nitride platelet particle having a layer of a ferromagnetic metal between the layers of hexagonal boron nitride thereof, and a process for preparing the composition thereof. The present invention further relates to polymeric composites formed therefrom. The present invention describes improvements in thermal conductivity of said composites when subject to an orienting magnetic field.Type: ApplicationFiled: December 18, 2009Publication date: June 24, 2010Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventor: Salah BOUSSAAD
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Publication number: 20100155650Abstract: An amidine-carboxylic acid complex in accordance with an aspect of the invention has an amidine ligand and a carboxylic acid ligand that are coordinated to one metal atom or a plurality of metal atoms of the same element. A multiple-complex-containing compound, i.e. a bridged polynuclear complex, in accordance with the aspect of the invention is formally derived from two or more such amidine-carboxylic acid complexes, linked by a polyvalent carboxylic acid ligand. The bridged polynuclear complex may be used in a production method to support metal (oxide) clusters on a porous support by impregnating these with a solution thereof, followed by drying and firing.Type: ApplicationFiled: June 7, 2007Publication date: June 24, 2010Inventors: Kazushi Mashima, Masato Ohashi, Akihiro Yagyu, Hirohito Hirata
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Publication number: 20100123456Abstract: A method for influencing and/or detecting magnetic particles in a region of action, magnetic particles and the use of magnetic particles is disclosed, which method comprises the steps of: —introducing magnetic particles into a region of action, —generating a magnetic selection field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action —changing the position in space of the two sub-zones in the region of action by means of a magnetic drive field so that the magnetization of the magnetic particles change locally, —acquiring signals, which signals depend on the magnetization in the region of action, which magnetization is influenced by the change in the position in space of the first and second sub-zone, wherein the magnetic particles comprise a core region and a shell region, the core region comprising a magnetic material, wherein the magnetic materType: ApplicationFiled: January 18, 2008Publication date: May 20, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Hans M. Boeve, Denis Markov
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Patent number: 7718082Abstract: The invention concerns a powder metallurgical composition containing, preferably a coarse, soft magnetic iron or iron-based powder, wherein the particles are surrounded by an insulating inorganic coating and as lubricant at least one non-drying oil or liquid having a crystalline melting point below 25° C., a viscosity (?) at 40° C. above 15 mPas and wherein said viscosity is temperature dependent according to the following formula: 10 log ?=k/T+C wherein the slope k is above 800 T is in Kelvin and C is a constant in an amount between 0.05 and 0.4% by weight of the composition.Type: GrantFiled: June 21, 2005Date of Patent: May 18, 2010Assignee: Höganäs ABInventors: Hilmar Vidarsson, Paul Skoglund, Björn Sk{dot over (a)}rman
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Patent number: 7708910Abstract: The present invention relates to ink jet printing ink consisting of an independently dispersed metal ultrafine particles-containing liquid dispersion in which the metal ultrafine particles having a particle size of not more than 100 nm are independently and uniformly dispersed and which is excellent in characteristic properties required for ink. The ink is used in the printing or the formation of conductive circuits using an ink jet printer.Type: GrantFiled: October 21, 2001Date of Patent: May 4, 2010Assignee: ULVAC, Inc.Inventors: Noriyuki Abe, Masaaki Oda
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Publication number: 20100104861Abstract: Metalforming tools comprising WC—Co cemented tungsten carbide are provided for warm and/or hot working operations. The WC—Co materials have controlled compositions and microstructures, resulting in properties that allow the material to be used in such warm and hot metalworking applications.Type: ApplicationFiled: October 24, 2008Publication date: April 29, 2010Inventors: David Richard Siddle, Irene Spitsberg
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Publication number: 20100104514Abstract: A method for providing nanoparticle clusters of controlled dimensions is described. The method involves an activation of individual nanoparticles and the subsequent interaction between activated particles to form a cluster.Type: ApplicationFiled: December 12, 2007Publication date: April 29, 2010Inventors: Dermot Brougham, Swapankumar Ghosh
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Patent number: 7704403Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.Type: GrantFiled: April 13, 2004Date of Patent: April 27, 2010Assignee: Electromagnetic CorporationInventor: Christopher J. Nagel
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Patent number: 7686894Abstract: A magnetically soft powder composite material is described, which is composed of at least 99.4 wt. % of a pure iron powder, a phosphatized iron powder, or an iron alloy powder and 0.05 wt. % to 0.6 wt. % of a soft ferrite powder and which is primarily suited for use in rapidly switching solenoid valves in motor vehicle engines. Furthermore, a method for manufacturing such a magnetically soft powder composite material includes the following method steps: a) preparation of a starting mixture including a pure iron powder, a phosphatized iron powder, or an iron alloy powder and a soft ferrite powder, b) mixing of the starting mixture, c) compacting of the starting mixture in a press under increased pressure, d) debinding of the compacted starting mixture in an inert gas atmosphere or in an oxygen-containing gas atmosphere, and e) heat treatment of the compacted starting mixture in an oxidizing gas atmosphere at a temperature of 410° C. to 500° C.Type: GrantFiled: January 27, 2003Date of Patent: March 30, 2010Assignee: Robert Bosch GmbHInventors: Adnan Okumus, Waldemar Draxler
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Publication number: 20100064771Abstract: An oxide semiconductor doped with a transition metal and exhibiting room-temperature ferromagnetism is disclosed. The transition metal-doped oxide semiconductor is preferably manufactured in powder form, and the transition metal is preferably evenly distributed throughout the oxide semiconductor. The preferred embodiments are iron-doped tin dioxide and cobalt-doped tin dioxide. Gases may be detected by passing them across a material and measuring the change in magnetic properties of the material; the preferred material is iron-doped tin dioxide.Type: ApplicationFiled: September 1, 2009Publication date: March 18, 2010Applicant: BOISE STATE UNIVERSITYInventor: ALEX PUNNOOSE
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Publication number: 20100061877Abstract: In a soft magnetic material, multiple flake-shaped magnetic particles: are coated by respective magnetic insulators; contain respective groups of magnetic nanoparticles; and are compacted to achieve magnetic exchange coupling between adjacent flake-shaped magnetic particles, and between adjacent magnetic nanoparticles within at least one of the flake-shaped magnetic particles.Type: ApplicationFiled: September 11, 2008Publication date: March 11, 2010Inventors: Mariam Sadaka, Chris Young, Vivek Mehrotra, Rahul Ganguli
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Publication number: 20100060539Abstract: The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band.Type: ApplicationFiled: March 26, 2009Publication date: March 11, 2010Inventors: Tomohiro Suetsuna, Kouichi Harada, Maki Yonetsu, Seiichi Suenaga
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Publication number: 20100047527Abstract: A reactive sintered magnetic article, a composite article comprising a mantle and at least one core and a laminate article comprising two or more composite articles are provided which each comprise (La1-aMa) (Fe1-b-cTbYc)13-dXe, wherein 0?a?0.9, 0?b?0.2, 0.05?c?0.2, ?1?d?+1, 0?e?3.Type: ApplicationFiled: February 12, 2007Publication date: February 25, 2010Applicant: Vacuumschmeize GmbH & Co. KGInventor: Matthias Katter
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Publication number: 20100044618Abstract: A soft magnetic material, a dust core, a method for manufacturing the soft magnetic material, and a method for manufacturing the dust core that can improve DC bias characteristics are provided. A soft magnetic material includes a plurality of metal magnetic particles 10 whose coefficient of variation Cv (?/?), which is a ratio of a standard deviation (?) of a particle size of the metal magnetic particles 10 to an average particle size (?) thereof, is 0.40 or less and whose circularity Sf is 0.80 or more and 1 or less. The metal magnetic particles 10 preferably have an average particle size of 1 ?m or more and 70 ?m or less. The soft magnetic material preferably further includes an insulating coated film that surrounds a surface of each of the metal magnetic particles 10.Type: ApplicationFiled: September 3, 2008Publication date: February 25, 2010Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tomoyuki Ishimine, Toshihiro Sakamoto, Toru Maeda, Naoto Igarashi
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Publication number: 20100045120Abstract: According to the present invention, a magnetic powder for a dust core, which is excellent in terms of insulation properties without causing a decrease in the dust core magnetic flux density, a dust core comprising the magnetic powder, and a motor or a reactor having a core composed of the dust core are provided. Therefore, a magnetic powder 10 for a dust core is characterized in that relatively hard oxide fine powder particles 2 are dispersed over and fixed to the surface of a soft magnetic metal powder particle 1, and that a relatively soft insulating coat 3 is fixed to the oxide fine powder particles 2 and portions where the dispersed and fixed oxide fine powder particles 2 do not exist on the surface of the soft magnetic metal powder particle 1.Type: ApplicationFiled: December 28, 2007Publication date: February 25, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyasu Kitano, Eisuke Hoshina, Daisuke Ichigozaki
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Publication number: 20100038580Abstract: A powder magnetic core is provided for operating at high frequencies that is obtained by pressure forming an iron-based magnetic powder covered with an insulation film, which has a specific resistance less than 1000, preferably less than 2000, and most preferably less than 3000 ?m, and a saturation magnetic flux density B above 1.5, preferably above 1.7, and most preferably above 1.9 (T). A method for the preparation of such cores as well as a powder which is suitable for the preparation also are provided.Type: ApplicationFiled: December 6, 2007Publication date: February 18, 2010Applicant: HOGANAS ABInventors: Zhou Ye, Björn Skårman
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Publication number: 20100035086Abstract: A spherical or ellipsoidal iron nitride magnetic powder having a core comprising iron nitride including a Fe16N2 phase as a primary phase and an outer layer containing yttrium (Y) and aluminum (Al), in which an average particle size r of the iron nitride magnetic powder is 20 nm or less, an average diameter d of the core is 4 to 10 nm, and a ratio of r to d (r/d) is 2 to 3, and average content of yttrium and aluminum in the outer layer are from 0.9 to 5 atomic % and from 30 to 50 atomic %, respectively, each based on the total number of iron atoms in the iron nitride magnetic powder, and standard deviations of the contents of yttrium and aluminum are 0.6 atomic % or less and 17 atomic % or less, respectively.Type: ApplicationFiled: August 4, 2009Publication date: February 11, 2010Applicant: HITACHI MAXELL. LTD.Inventors: Tetsutaro INOUE, Yuji SASAKI
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Publication number: 20100035775Abstract: A plurality of carbon-metal nanocomposites. In one embodiment, the plurality of carbon-metal nanocomposites includes a plurality of carbons with a molecular structure that shows a first peak in the range of 1585 to 1565 cm?1 in a corresponding Raman spectrum, and a second peak in the range of 1325 to 1355 cm?1 in the corresponding Raman spectrum, wherein the first peak represents carbons with a graphitic nature and the second peak represents nanodiamonds, and wherein the plurality of carbon-metal nanocomposites is made from a metal derivative or metal chelated derivative of a carbon-containing precursor in solid form that is subjected to microwave radiation at a frequency in the range of 900 MHz to 5.8 GHz, for a period of time effective to allow the plurality of carbon-metal nanocomposites to be formed.Type: ApplicationFiled: June 18, 2009Publication date: February 11, 2010Applicant: Board of Trustees of the University of ArkansasInventor: Tito Viswanathan
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Publication number: 20100032609Abstract: Magnetic nanostructures comprised of an assembly of magnetic nanorods held together by dipole forces in a dendritic pattern and their method of manufacture. The dendritic magnetic nanostructures are prepared at room temperature by applying a magnetic field to a reverse micelle system wherein at least one salt of a magnetic metal is being precipitated within the core of the reverse micelle.Type: ApplicationFiled: October 7, 2009Publication date: February 11, 2010Inventor: Devesh Kumar Misra
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Publication number: 20100001226Abstract: The present invention is to impart, to a sheet-like soft magnetic material, a configuration in which sheet thickness change is suppressed and in which fluctuation in magnetic permeability is small even under a high-temperature or a high-temperature, high-humidity environment, even when a plurality of thin curable soft magnetic sheets produced by a coating method are laminated. The sheet-like soft magnetic material is formed from a soft magnetic composition which is formed by mixing at least a flat soft magnetic powder, an acrylic rubber, an epoxy resin, a curing agent for the epoxy resin, and a solvent. The flat soft magnetic powder is arranged in an in-plane direction of the sheet-like soft magnetic material. An acrylic rubber having a glycidyl group is used for the acrylic rubber. The weight ratio of the flat soft magnetic powder with respect to the total amount of the acrylic rubber, the epoxy resin, and the curing agent for the epoxy resin is 3.7 to 5.8.Type: ApplicationFiled: October 22, 2007Publication date: January 7, 2010Applicant: Sony Chemical & Information Device CorporationInventors: Keisuke Aramaki, Junichiro Sugita, Morio Sekiguchi
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Publication number: 20100000769Abstract: There are provided a composite magnetic body exhibiting a sufficiently low magnetic loss at frequencies of several hundreds of megahertz to several gigahertz, and a method of manufacturing the same. The composite magnetic body contains a magnetic powder dispersed in an insulating material. The magnetic powder is in a spherical shape or an elliptic shape. The composite magnetic body has any one of the following characteristics (a) to (c): (a) the relative magnetic permeability ?r is larger than 1 and the loss tangent tan ? is 0.1 or less, at a frequency of 1 GHz or 500 MHz; (b) the real part ?r? of the complex permeability is more than 10 and the loss tangent tan ? is 0.3 or less, at a frequency of 1.2 GHz or less; and (c) the real part ?r? of the complex permeability is more than 1 at a frequency of 4 GHz or less, and the loss tangent tan ? is 0.1 or less at a frequency of 1 GHz or less.Type: ApplicationFiled: January 22, 2008Publication date: January 7, 2010Inventors: Tadahiro Ohmi, Akinobu Teramoto, Masayuki Ishizuka, Nobuhiro Hidaka, Yasushi Shirakata
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Publication number: 20100003167Abstract: The present invention includes a magnetically susceptible polymer component, a method of making the same, and apparatuses and systems for mixing, separating or localizing a magnetically susceptible polymer compound in a reaction. The magnetically susceptible polymer component includes a polymer and a magnetically susceptible particle of a predetermined size, which yields a component having a much-improved magnetic reactivity due to the increase in magnetic material by mass percentage. The apparatuses and systems of the present invention employ controllable magnetic fields distributable in perpendicular directions in order to precisely control the orientation, position and relative motion of any magnetically susceptible components within a reaction vessel.Type: ApplicationFiled: October 30, 2007Publication date: January 7, 2010Applicant: STC.UNMInventors: Bentley Paul, Davenport Michael
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Publication number: 20090321676Abstract: An ink including stabilized magnetic single-crystal nanoparticles, wherein the value of the magnetic anisotropy of the magnetic nanoparticles is greater than or equal to 2×104 J/m3. The magnetic nanoparticle may be a ferromagnetic nanoparticle, such as FePt. The ink includes a magnetic material that minimizes the size of the particle, resulting in excellent magnetic pigment dispersion stability, particularly in non-aqueous inkjet inks. The smaller sized magnetic particles of the ink also maintains excellent magnetic properties, thereby reducing the amount of magnetic particle loading required in the ink.Type: ApplicationFiled: June 26, 2008Publication date: December 31, 2009Applicant: XEROX CORPORATIONInventors: Marcel P. BRETON, Richard P.N. VEREGIN, Karen A. MOFFAT, Peter M. KAZMAIER, Patricia A. BURNS, Paul F. Smith
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Publication number: 20090314981Abstract: A sintered ferrite magnet having a ferrite phase with a hexagonal structure as the main phase, wherein the composition of the metal elements composing the main phase is represented by the following general formula (1): RxCamA1?x?m(Fe12?yMy)z: ??(1), x, m, y and z in formula (1) satisfying all of the conditions represented by the following formulas (2)-(6): 0.2?x?0.5: ??(2) 0.13?m?0.41: ??(3) 0.7x?m?0.15: ??(4) 0.18?yz?0.31: ??(5) 9.6?12z?11.8: ??(6), and wherein the density of the sintered ferrite magnet is at least 5.05 g/cm3, and the crystal grains of the sintered ferrite magnet satisfy all of the conditions represented by the following formulas (7) and (8), where L ?m is the average for the maximum value and S ?m is the average for the minimum value among the diameters passing through the center of gravity of each grains in the crystal cross-section parallel to the c-axis direction of hexagonal structures. L?0.95: ??(7) 1.8?L/S?2.Type: ApplicationFiled: February 27, 2008Publication date: December 24, 2009Applicant: TDK CorporationInventors: Shigeki Yanagida, Noboru Ito, Yuuki Aburakawa, Naoki Mori, Yoshihiko Minachi
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Publication number: 20090306455Abstract: A method of providing magnetised particles at a location using particles which can be switched between magnetic and non-magnetic states by exposure to a suitable magnetic field. The method comprises conveying the particles in their non-magnetic state to the location; and then exposing the particles to the suitable magnetic field so that they switch to their magnetic state.Type: ApplicationFiled: June 14, 2006Publication date: December 10, 2009Inventors: Robert Andrew Slade, John Simon Owen Evans, David Parker, Russell Paul Cowburn, Michael Eaton
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Publication number: 20090267017Abstract: A flat soft magnetic material to be used for a noise-suppressing magnetic sheet, wherein the 50% particle size D50 (?m), coercive force Hc (A/m) and bulk density BD (Mg/m3) of the flat soft magnetic material satisfy the following formula (1). D50/(HC×BD)?1.Type: ApplicationFiled: April 20, 2009Publication date: October 29, 2009Applicant: TDK CorporationInventors: Atsuhito Matsukawa, Katsuhiko Wakayama, Hideharu Moro, Naoyoshi Sato, Yoshihito Hirai, Toshihisa Murayoshi
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Publication number: 20090242826Abstract: To provide a high-frequency magnetic material having a superior radio wave absorption property in a high frequency region and a method of manufacturing the same. The high-frequency magnetic material and the method of manufacturing the same includes a magnetic substance containing metal nanoparticles, the metal nanoparticles are magnetic metals containing at least one kind of Fe, Co, and Ni, an average particle diameter of the metal nanoparticles is equal to or less than 200 nm, first clusters having network-like structures with continuous metal nanoparticles and the average diameter equal to or less than 10 ?m are formed, second clusters having network-like structures with the continuous first clusters and the average diameter equal to or less than 100 ?m are formed, and the entire magnetic substance has a network-like structure with the continuous second clusters.Type: ApplicationFiled: March 18, 2009Publication date: October 1, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kouichi Harada, Tomohiro Suetsuna, Seiichi Suenaga
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Publication number: 20090224615Abstract: The sintered magnet and the rotating machine equipped with the same are disclosed. The sintered magnet includes crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or oxyfluoride compound layer containing at least one element selected from an alkali metal element, an alkali earth metal element, and a rare earth element. The layer is formed inside some of the crystal grains or in a part of a grain boundary part. An oxyfluoride compound or fluoride compound layer containing carbon in a stratified form is formed on an outermost surface of the crystal grains. The fluoride compound or oxyfluoride compound layer has a concentration gradient of carbon, contains at least one light rare earth element and at least one heavy rare earth element. The heavy rare earth element has a concentration lower than that of the light rare earth element.Type: ApplicationFiled: January 28, 2009Publication date: September 10, 2009Applicant: Hitachi, Ltd.Inventors: Matahiro KOMURO, Yuichi SATSU, Yutaka MATSUNOBU, Takashi YASUHARA
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Patent number: 7572388Abstract: A magnet compound material to be compression molded, said magnet compound material comprising a magnetic powder and a binder resin particles, wherein a ratio of Dv to Dn is in a range of 1.1 to 1.3, Dv and Dn of the binder resin particles denote the volume average particle diameter and the number average particle diameter, respectively.Type: GrantFiled: August 2, 2006Date of Patent: August 11, 2009Assignee: Ricoh Company, Ltd.Inventors: Satoshi Terashima, Sumio Kamoi, Yoshiyuki Takano, Tsuyoshi Imamura, Kyohta Koetsuka, Noriyuki Kamiya, Mieko Terashima
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Publication number: 20090191401Abstract: Magnetic receptive Paints and coatings have been developed to allow one to paint a wall with this coating and apply magnets to this surface. The further development of magnetic receptive coatings incorporates the use of multiple size particles giving the finished surface a smoother appearance and increasing the particle load in the dry mill surface. This is useful in the coating of substrates where the need to coat the thinnest possible coating on the surface of a substrate such as papers and films as well as painting on walls, gives you the highest magnetic receptive surface possible at the thinnest mill thickness of applied coating.Type: ApplicationFiled: April 28, 2005Publication date: July 30, 2009Inventor: Dayton Joseph Deetz
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Publication number: 20090184705Abstract: 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: Fe100-x-a-y-cMxCuaM?yX?c (atomic %), wherein M is at least one element selected from Co and Ni, M? is at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, X? is at least one element selected from Si and B, and x, a, y, and c meets the composition of 3?x?50, 0.1?a?3, 1?y?10, 2?c?30, and also 7?y+c?30, and an alloy comprising a crystal grain consisting of at least a part or all of the composition with a mean particle size of less than or equal to 50 nm.Type: ApplicationFiled: March 19, 2007Publication date: July 23, 2009Inventor: Yoshihito Yoshizawa
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Publication number: 20090184281Abstract: Nanotechnology methods for creating stoichiometric and non-stoichiometric substances with unusual combination of properties by lattice level composition engineering are described.Type: ApplicationFiled: October 31, 2003Publication date: July 23, 2009Inventors: Tapesh Yadav, John Alexander
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Publication number: 20090173908Abstract: The invention relates to composites made of an elastic carrier medium comprising polynorbornene (PNR) and magnetisable particles which are polarised reversibly in a magnetic field. Thus the mechanical properties, such as e.g. storage modulus G? (describes the elastic behaviour or the energy storage) and loss modulus G? (describes the viscous behaviour or the energy dissipation), of such elastomer composites can be increased rapidly and reversibly within wide limits (up to approx. two orders of magnitude) as a function of an external magnetic field. Wide-ranging application possibilities are produced herefrom, e.g. for adaptive damping systems, in which the damping force can be adjusted via the strength of the magnetic field.Type: ApplicationFiled: April 10, 2007Publication date: July 9, 2009Applicant: Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V.Inventors: Holger Böse, Rene' Röder, Nikolaus Rennar
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Publication number: 20090173907Abstract: The invention relates to a composite material formed by millimeter-scale particles of magnetic material A and a conductive liquid B. The material is characterized in that the material A is chosen from magnetic compounds and magnetic alloys and is in the form of particles, the mean size of which is between 0.1 and 2 mm, and in that the support fluid B is a conductive fluid chosen from metals, metal alloys and salts that are liquid at temperatures below the Curie temperature of the material A, or from mixtures thereof.Type: ApplicationFiled: June 26, 2006Publication date: July 9, 2009Inventors: Emmanuelle Dubois, Jean Chevalet