Composite Powder (e.g., Coated, Etc.) Patents (Class 428/570)
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Patent number: 7951463Abstract: In an Al composite material collapsible in the presence of moisture, the external surface of small pieces or powder constructed from a single or a plurality of crystalline grains of Al or an Al alloy is covered with a film of a low melting point metal or alloy selected from the group consisting of In, Sn, combinations of In and Sn, and alloys thereof. The content of the foregoing low melting point metal or alloy ranges from 0.1 to 20% by mass on the basis of the total mass of the composite material. A component member for a film-forming chamber is also provided, which is provided with a water-collapsible Al film on the surface thereof. Film-forming operations are continued over a long period of time using the component member for a film-forming chamber provided with the water-collapsible Al film and then film-forming materials can be recovered from the component member on which the film-forming materials are deposited in a substantial thickness.Type: GrantFiled: March 4, 2005Date of Patent: May 31, 2011Assignee: Ulvac, Inc.Inventors: Akisuke Hirata, Shinji Isoda, Yutaka Kadowaki, Katsuhiko Mushiake
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Patent number: 7946467Abstract: A braze material and processes for making and using the material, such as for use in the manufacturing, coating, repair, and build-up of superalloy components. The braze material is composed of particles with melt-modifying constituents that are limited to the surfaces of the particles, yet are capable of sufficiently promoting the heating of the particles by conventional means and microwave radiation to achieve at least partial melting of the particles. The melt-modifying constituents are in the form of particulates embedded in the outer surface region of each particle. The particulates are formed of melting point depressant(s) and/or microwave coupling enhancer(s), are much smaller than the particle in which they are embedded.Type: GrantFiled: December 15, 2006Date of Patent: May 24, 2011Assignee: General Electric CompanyInventor: Laurent Cretegny
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Patent number: 7935419Abstract: Colloidal nanocrystal quantum dots comprising an inner core having an average diameter of at least 1.5 nm and an outer shell, where said outer shell comprises multiple monolayers, wherein at least 30% of the quantum dots have an on-time fraction of 0.80 or greater under continuous excitation conditions for a period of time of at least 10 minutes.Type: GrantFiled: February 6, 2009Date of Patent: May 3, 2011Assignee: Los Alamos National Security, LLCInventors: Jennifer A. Hollingsworth, Yongfen Chen, Victor I. Klimov, Han Htoon, Javier Vela
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Publication number: 20110091389Abstract: Techniques are generally described for particles with a surface including an adhesion material. The adhesion material may be selectively activated in response to radiation. The particles may be distributed proximate to a target through a fluid system. Radiation may be emitted toward the target causing the adhesion material to activate. The activated adhesive material on the surface of the particles may adhere to the target providing a fiducial mark or reference point. The fiducial mark may be visible through a medical imaging technique. In some examples, the particles may be nanoparticles. In some examples, the radiation may be infrared radiation.Type: ApplicationFiled: October 16, 2009Publication date: April 21, 2011Inventor: EZEKIEL KRUGLICK
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Patent number: 7918915Abstract: The present invention relates to a wear resistant iron-based powder, suitable for the production of pressed and sintered components, comprising 10-20% by weight of Cr, 0.5-5% by weight of Mo and 1-2% by weight of C. The powder is characterised in that it includes pre-alloyed water atomized iron-based powder particles and chromium carbide particles diffusion bonded onto said pre-alloyed powder particles. The invention also relates to a method of producing this powder.Type: GrantFiled: September 18, 2007Date of Patent: April 5, 2011Assignee: Höganäs ABInventors: Ola Bergman, Paul Nurthen
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Publication number: 20110031001Abstract: A composite metal fine particle material is provided, in which spherical silver nanoparticles synthesized from a silver compound, a solvent, a reducing agent, and a dispersant, and conductive fillers compose of non-spherical metal fine particles, are mixed. For example, the conductive fillers composed of the non-spherical metal fine particles are formed into slender columnar shapes, plate shapes, or ellipsoidal shapes.Type: ApplicationFiled: February 8, 2010Publication date: February 10, 2011Applicant: HITACHI CABLE LTD.Inventors: Dai ISHIKAWA, Tomiya ABE, Masanobu ITO
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Publication number: 20110020663Abstract: The disclosure relates to metal reduction processes, which comprise adding a mixture comprising at least one metal-containing material, at least one reducing agent, and at least one additive into a reactor, heating the reactor to a selected reduction temperature, moving the mixture through the reactor while stirring the mixture, allowing a reduction period to occur, and obtaining a resulting composition comprising at least one zero-valent metal and a residue. The disclosure also relates to metallurgical processes comprising the metal reduction process, and products made by the metal reduction process. The disclosure further relates to metal reduction apparatuses, as well as metal reduction systems and metallurgical systems comprising the metal reduction apparatuses.Type: ApplicationFiled: June 28, 2010Publication date: January 27, 2011Inventor: Bairong LI
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Publication number: 20100304173Abstract: A nanoprism having a prismatic silver shell formed about a gold core and a process of forming the same are disclosed. The process includes irradiating a mixture of gold and silver nanoparticles with a narrow band of wavelengths capable of exciting the surface plasmon resonance of the gold.Type: ApplicationFiled: July 28, 2008Publication date: December 2, 2010Applicant: NORTHWESTERN UNIVERSITYInventors: Chad A. Mirkin, Can Xue, Jill E. Millstone
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Publication number: 20100266861Abstract: A method for producing a powder for a magnetic core, in which an alkoxide film formation step and a silicone resin film formation step are carried out to form an insulation film composed of an alkoxide film and a silicone resin film on the surface of a pure iron powder, wherein the alkoxide film formation step comprises immersing a pure iron powder in an alkoxide-containing solution which is prepared by mixing a Si alkoxide having at least one organic group having a polar group comprising at least one of N, P, S and O atoms and an Al alkoxide with a dehydrated organic solvent, and drying to remove the dehydrated organic solvent, thereby forming an alkoxide film comprising an Al—Si—O type composite oxide on the surface of the pure iron powder; and the silicone resin film formation step comprises immersing the pure iron powder having the alkoxide film formed thereon in a silicone resin-containing solution which is prepared by mixing a silicone resin with an organic solvent, and drying to remove the organic solvType: ApplicationFiled: October 30, 2008Publication date: October 21, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shin Tajima, Masaaki Tani, Daisuke Okamoto, Eisuke Hoshina, Hidefumi Kishimoto, Daisuke Ichigozaki
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Patent number: 7811355Abstract: The present invention relates to niobium powder for a capacitor, comprising a niobium layer and a mixed layer of silicon nitride and niobium, the mixed layer being present in the vicinity of the powder particle surface; granulated niobium powder thereof; a niobium sintered body using the niobium powder and the granulated powder; and a capacitor using the sintered body as one electrode. The niobium powder for a capacitor of the present invention enables to produce a niobium capacitor having a high capacitance, a low leakage current, a low ESR and good tan ? characteristics and being excellent particularly in the properties of the breakdown voltage and soldering heat resistance.Type: GrantFiled: November 9, 2004Date of Patent: October 12, 2010Assignee: Showa Denko K.K.Inventors: Kazuhiro Omori, Hitoshi Amita
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Publication number: 20100255332Abstract: Flowability-improving particles are adhered to surfaces of iron powder through a binder to provide an iron-based powder for powder metallurgy which has excellent flowability and which is capable of uniformly filling a thin-walled cavity and compaction with high performance of ejection force.Type: ApplicationFiled: December 13, 2007Publication date: October 7, 2010Applicant: JFE Steel CorporationInventors: Tomoshige Ono, Shigeru Unami, Takashi Kawano, Yukiko Ozaki
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Publication number: 20100247944Abstract: The invention relates to a metal matrix material made of a hydrogen-permeable metal 1 and a chemically stable metal 2 that is also hydrogen permeable, said matrix material having a structure comprised of a plurality of centers made of the metal 2 surrounded by the metal 1. The invention further relates to a method for the production of said matrix material, having the following steps: a. optionally pretreating the metal 1 and/or 2 b. coating metal 1 with a metal 2 to form a composite metal powder c. pressing the composite metal powder into the metal matrix material according to the invention in the form of a pressed body d. optionally deforming the pressed body thus obtained to form a molded body. The metal matrix material has a greater mechanical stability as compared to a conventionally coated metal film by virtue of a more homogeneous stress distribution during the change in volume of the metal phases as a result of hydrogen absorption and thermal expansion.Type: ApplicationFiled: September 9, 2008Publication date: September 30, 2010Applicant: BAYER TECHNOLOGY SERVICES GMBHInventors: Leslaw Mleczko, Juergen Kintrup, Ralph Weber, Andre Dammann, Rafael Warsitz, Aurel Wolf
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Publication number: 20100248297Abstract: Particles and manufacturing methods thereof are provided. The manufacturing method of the particle includes providing a precursor solution containing a precursor dissolved in a solution, and irradiating the precursor solution with a high energy and high flux radiation beam to convert the precursor to nano-particles. Particles with desired dispersion, shape, and size are manufactured without adding a stabilizer or surfactant to the precursor solution.Type: ApplicationFiled: August 22, 2009Publication date: September 30, 2010Inventors: Yeu-Kuang Hwu, Chang-Hai Wang, Chi-Jen Liu, Cheng-Liang Wang, Chi-Hsiung Chen, Chung-Shi Yang, Hong-Ming Lin, Jung-Ho Je, Giorgio Margartondo
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Publication number: 20100243579Abstract: This invention describes a process for producing a nanoscale zero-valent metal, including reduction of a metal ion solution with a dithionite compound, wherein the reduction is carried out under alkaline conditions under substantially an inert atmosphere. A nanoscale zero-valent metal obtainable by this process, and having a new crystalline form, is also described. The nanoscale zero-valent metal produced by the process of the invention is preferably iron, and is advantageously used for the remediation of contaminated water.Type: ApplicationFiled: February 26, 2010Publication date: September 30, 2010Applicant: CRC for Waste Management and Pollution Control LimitedInventors: Andrew FEITZ, Jing GUAN, David WAITE
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Publication number: 20100239879Abstract: Since a surface of an iron powder is covered with an oxide film composed of a Si-based oxide in which the ratio of Si to Fe satisfies Si/Fe?0.8 on an atomic number basis, an iron powder for dust cores is provided which can be formed into a dust core having a high resistivity and hence having a low iron loss without degrading the mechanical strength.Type: ApplicationFiled: December 11, 2008Publication date: September 23, 2010Applicants: JFE STEEL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Kawano, Noriko Makiishi, Tatsuhiko Hiratani, Naomichi Nakamura, Yusuke Oishi, Eisuke Hoshina, Toshiya Yamaguchi, Daisuke Okamoto, Takeshi Hattori
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Publication number: 20100233011Abstract: There are provided are a method wherein a surface treating agent, which is essential for making copper particles antioxidative and dispersing the copper particles in the prior art, is hardly used but copper particles, which cause little electromigration and are small in the price rate of material itself, are used to form a low-resistance copper wiring pattern while the generation of cracks therein is restrained; and a copper oxide particle dispersed slurry used therein. The method is a method for forming a copper wiring pattern including the step of using a dispersion slurry wherein copper based particles having a copper oxide surface are dispersed to form any pattern over a substrate, and the step of reducing the copper oxide surface of the copper based particles in the pattern with atomic form hydrogen to return the oxide to copper, and sintering particles of the copper metal generated by the reduction and bonding the particles to each other.Type: ApplicationFiled: October 20, 2008Publication date: September 16, 2010Inventors: Hideo Nakako, Kazunori Yamamoto, Youichi Machii, Yasushi Kumashiro, Shunya Yokozawa, Yoshinori Ejiri, Katsuyuki Masuda
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Publication number: 20100233014Abstract: A powder metallurgical combination is provided comprising an iron-based powder A comprising core particles of iron to which core particles nickel is diffusion alloyed and wherein said nickel diffusion alloyed to said core particles comprises 4-7% (preferably 4.5-6%) by weight of said iron-based powder A, and a powder B substantially consisting of particles of pure iron. Further a method is provided for preparing a powder metallurgical combination.Type: ApplicationFiled: July 10, 2008Publication date: September 16, 2010Applicant: HOGANAS AB (PUBL)Inventor: Mats Larsson
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Publication number: 20100227189Abstract: A method of synthesizing ligand-capped metal nanoparticles is disclosed and described. A method of synthesizing ligand-capped metal nanoparticles can comprise reacting a metal salt with 9-borabicyclo [3.3.1] nonane as a reducing agent in the presence of a capping ligand to form the ligand-capped metal nanoparticles. The method can be a single step approach which also significantly broadens choices for capping agents which can be readily incorporated during formation of the metal nanoparticles.Type: ApplicationFiled: March 9, 2010Publication date: September 9, 2010Inventors: Jennifer S. Shumaker-Parry, Rajesh Sardar, Patrick M. Shem
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Publication number: 20100221608Abstract: An electrode alloy powder includes a hydrogen storage alloy and magnetic material clusters. The hydrogen storage alloy contains 20 to 70 wt % of Ni. The magnetic material clusters contain metal nickel, and have an average cluster size of 8 to 10 nm. A method for producing the electrode alloy powder includes an activation step of allowing a raw material powder including a hydrogen storage alloy to be in contact with an aqueous solution containing A wt % of sodium hydroxide and held at 100° C. or greater for B minutes. A and B satisfy 2410?A×B?2800.Type: ApplicationFiled: September 14, 2006Publication date: September 2, 2010Inventors: Hideaki Ohyama, Kyoko Nakatsuji, Yoshitaka Dansui, Shinichi Orimo, Yuko Nakamori, Hai-Wen Li, Kazutaka Ikeda
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Publication number: 20100212455Abstract: An iron-based soft magnetic powder for dust core having a high magnetic flux density, maintaining high electric insulation even after annealing, and more excellent in the mechanical strength in which a coating film having a phosphate conversion coating film is formed on the surface thereof and the peak height for the absorption of hydroxyl groups formed at 3700 cm?1 to 2500 cm?1 is 0.04 or more being indicated by absorbance when the coating film is analyzed by infrared diffuse reflectance spectroscopy.Type: ApplicationFiled: December 29, 2009Publication date: August 26, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd)Inventors: Takeshi OHWAKI, Hiroyuki Mitani, Hirofumi Hojo, Kasumi Yanagisawa, Nobuaki Akagi
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Patent number: 7776450Abstract: A thermal spraying powder contains 30 to 50% by mass of chromium carbide with the remainder being an alloy containing chromium, aluminum, yttrium, and at least one of cobalt and nickel. The thermal spraying powder has an average particle size of 20 to 60 ?m. The thermal spraying powder may contain 20% by mass or less of yttrium oxide in place of a part of the alloy. A thermal spray coating obtained by thermal spraying of the thermal spraying powder, particularly, a thermal spray coating obtained by high-velocity flame spraying of the thermal spraying powder is suitable for the purpose of a hearth roll.Type: GrantFiled: March 27, 2008Date of Patent: August 17, 2010Assignee: Fujimi IncorporatedInventors: Hiroaki Mizuno, Satoshi Tawada, Isao Aoki, Noriyuki Yasuo, Tatsuo Suidzu, Sho Hashimoto
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Publication number: 20100188179Abstract: The invention relates to an iron-based soft magnetic powder for a dust core, wherein a film comprising Fe and Co, a phosphoric acid-based chemical conversion film and a silicone resin film are formed in this order on the surface of an iron-based soft magnetic powder, and to a dust core obtained by molding the iron-based soft magnetic powder for a dust core. The invention also relates to an iron-based soft magnetic powder for a dust core formed by coating the surface of an iron-based soft magnetic powder with an insulating film, wherein the powder has a particle diameter of from 45 ?m to 180 ?m, the insulating film is composed of two layers in which a lower layer composed of a phosphoric acid-based chemical conversion film and an upper layer composed of a silicone resin film, and each of the films has a thickness of from 100 nm to 280 nm, and to a dust core obtained by molding the iron-based soft magnetic powder for a dust core.Type: ApplicationFiled: July 2, 2008Publication date: July 29, 2010Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Hiroyuki Mitani, Nobuaki Akagi, Hirofumi Houjou
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Publication number: 20100173170Abstract: A method of producing titanium metal from a titanium-containing material includes the steps of producing a solution of M?TiF6 from the titanium-containing material, selectively precipitating M?2TiF6 from the solution by the addition of (M?)aXb and using the selectively precipitated M?2TiF6 to produce titanium. M? is a cation of the type which forms a hexafluorotitanate, M? is selected from ammonium and the alkali metal cations, X is an anion selected from halide, sulphate, nitrite, acetate and nitrate and a and b are 1 or 2.Type: ApplicationFiled: December 8, 2009Publication date: July 8, 2010Applicant: Peruke Investment Holdings (Proprietary) LimitedInventor: Gerard Pretorius
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Patent number: 7745013Abstract: A foamed solder or a nano-porous solder is formed on a substrate of an integrated circuit package. The foamed solder exhibits a low modulus that resists cracking during shock and dynamic loading. The foamed solder is used as a solder bump for communication between an integrated circuit device and external structures.Type: GrantFiled: December 30, 2005Date of Patent: June 29, 2010Assignee: Intel CorporationInventors: Heeman Choe, Daewoong Suh
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Publication number: 20100154588Abstract: A water-atomized iron-based powder is provided that is pre-alloyed with 0.75-1.1% by weight of Ni, 0.75-1.1% by weight of Mo and up to 0.45% by weight of Mn, and further including 0.5-3.0%, preferably 0.5-2.5% and most preferably 0.5-2.0% by weight of Cu, and inevitable impurities, the balance being Fe.Type: ApplicationFiled: June 12, 2008Publication date: June 24, 2010Inventors: Sigurd Berg, Ulf Engström, Caroline Larsson
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Patent number: 7740939Abstract: An insulating magnetic metal particle includes a magnetic metal particle containing at least one metal selected from the group consisting of Co, Fe, and Ni and having a diameter of 5 to 500 nm, a first inorganic insulating layer made of an oxide that covers the surface of the magnetic metal particle, and a second inorganic insulating layer made of an oxide that produces a eutectic crystal by reacting together with the first inorganic insulating layer at the time of heating them, the second inorganic insulating layer being coated on the first inorganic insulating layer. A thickness ratio of the second inorganic insulating layer with respect to the first inorganic insulating layer is set so that the first inorganic insulating layer remains on the surface of the magnetic metal particle after producing the eutectic crystal.Type: GrantFiled: July 23, 2007Date of Patent: June 22, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Kouichi Harada, Tomohiro Suetsuna, Seiichi Suenaga, Maki Yonetsu
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Publication number: 20100151267Abstract: A powder batch is described comprising single crystal metal-containing particles having a crystal size of less than 50 nm as measured by X-ray diffraction and having a weight average particle size of from about 10 nanometers to less than 100 nanometers as measured by transmission electron microscopy and including a continuous or non-continuous coating of a ceramic material. The powder batch is preferably produced by flame spraying.Type: ApplicationFiled: June 19, 2007Publication date: June 17, 2010Applicant: Cabot CorporationInventors: Toivo T. Kodas, Miodrag Oljaca, Mark J. Hampden-Smith, George P. Fotou, Ralph E. Kornbrekke, Jian-Ping Shen
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Patent number: 7726023Abstract: In order to create titanium components with a titanium composite insert, a method is provided whereby an initial pre form 1 has a groove 2 formed in it. An encapsulating member 4 is then provided about the groove 2 in order to create a cavity 5 which is filled with titanium alloy powder 6. This titanium alloy powder 6 is densified and then accurately machined in order to create a groove insert form 7 which can accommodate a titanium composite material pre form insert 8 and further titanium alloy powder 9 such that through a high temperature isostatic pressing (HIP) process, the insert 8 is embedded. The original component form 1 can then be machined in order to create the final component elements such as aerofoils 13.Type: GrantFiled: June 15, 2006Date of Patent: June 1, 2010Assignee: Rolls-Royce PLCInventor: John Gareth Pursell
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Patent number: 7727630Abstract: Nickel powder batches and methods for producing nickel powder batches. The powder batches include particles having a small particle size, narrow size distribution and a spherical morphology. The present invention is also directed to devices incorporating the nickel metal powders.Type: GrantFiled: June 5, 2008Date of Patent: June 1, 2010Assignee: Cabot CorporationInventors: Toivo T. Kodas, Mark J. Hampden-Smith, James Caruso, Quint H. Powell, Daniel J. Skamser, Clive D. Chandler
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Patent number: 7700194Abstract: A high-frequency magnetic material is provided and includes: an oxide phase including: a first oxide of a first element being at least one selected from the group consisting of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and a second oxide of a second element being at least one selected from the group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, and Zn, the first oxide and at least a part of the second oxide being formed into a solid solution; and magnetic metal particles including at least one of Fe and Co and having a particle size of 1 to 100 nm, the magnetic metal particles being deposited on a surface and inside of the oxide phase, the magnetic metal particles occupying 50% of a volume of the high-frequency magnetic material exclusive of a void.Type: GrantFiled: March 11, 2008Date of Patent: April 20, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tomohiro Suetsuna, Seiichi Suenaga, Kouichi Harada
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Patent number: 7700193Abstract: A core-shell structure with magnetic, thermal, and optical characteristics. The optical absorption band is tailorable by choice of the mixing ratio of the core/shell component to give the desired shell thickness. The core-shell structure is particularly suitable for biomedical applications such as MRI (magnetic resonance imaging) developer, specific tissue identification developer, and magnetic thermal therapy.Type: GrantFiled: September 29, 2005Date of Patent: April 20, 2010Assignee: Industrial Technology Research InstituteInventors: Ming-Yao Chen, Wen-Hsiang Chang, Chin-I Lin, Shian-Jy Jassy Wang, Yuh-Jiuan Lin
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Publication number: 20100072434Abstract: It provides a method for preparing metal nanoparticles using a metal seed and metal nanoparticles including the metal seed, the method including: preparing a solution by adding a polymer surfactant in an alcohol solvent; heating the solution; forming a metal seed by adding a first metal salt of at least one metal salt selected from the group consisting of platinum, palladium and iridium in the heated solution; and adding a second metal salt into the solution including the metal seed. This method allows the production of uniform-sized nanoparticles under high concentration conditions in high yield and mass production in which the metal nanoparticles have high dispersion stability so that they are suitable for various application.Type: ApplicationFiled: May 8, 2009Publication date: March 25, 2010Inventors: Kwi-Jong Lee, Hyun-Joo Song, Dae-Ha Seo, Jong-Wook Jung, Dong-Hoon Kim
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Patent number: 7670406Abstract: A composite powder for a deposition of a composite coating comprises a nonmetallic component and a metallic component, the metallic component having an amorphous structure or a nanocrystalline structure. The metallic component may include an amorphous metallic alloy. The metallic alloy may include constituents having the amorphous structure. The metallic component may include a combination of the metallic alloy existing in the amorphous state and constituents of the amorphous metallic alloy in the amorphous state. The composite metal-ceramic powders are used for depositing composite coatings on a selected surface. Disclosed are several methods and systems for producing such composite powders. Disclosed are also several methods and systems for depositing composite coatings. Advantageously, the deposited coatings exhibit high corrosion resistance, high wear resistance, and excellent structural properties.Type: GrantFiled: March 15, 2007Date of Patent: March 2, 2010Inventor: Vladimir E. Belashchenko
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Patent number: 7641970Abstract: A low temperature sinterable dielectric ceramic composition is obtained by bending 2.5-20 parts by weight of a glass component per 100 parts by weight of an aggregate of dielectric particles which are composed of Ti-containing dielectric material and contain an oxide including Ti and Zn in the surface portions. A low temperature sintered dielectric ceramic is produced by sintering this low temperature sinterable dielectric ceramic composition at 880 to 1000° C. With this low temperature sinterable dielectric ceramic composition, there can be obtained a multiplayer electronic component having an internal conductor composed of Ag, Cu or an alloy containing at least one of them.Type: GrantFiled: March 3, 2005Date of Patent: January 5, 2010Assignee: UBE Industries, Ltd.Inventors: Takafumi Kawano, Masataka Yamanaga, Koichi Fukuda
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Patent number: 7641983Abstract: Medical devices, such as endoprostheses, and methods of making the devices are disclosed. In some embodiments, a medical device includes a composite having a metallic matrix and a plurality of particles in the matrix, the particles and the matrix having different compositions.Type: GrantFiled: April 4, 2005Date of Patent: January 5, 2010Assignee: Boston Scientific SciMed, Inc.Inventor: Jonathan S. Stinson
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Patent number: 7635518Abstract: 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: GrantFiled: February 24, 2006Date of Patent: December 22, 2009Assignee: University of Louisiana at LafayetteInventor: Devesh Kumar Misra
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Patent number: 7628840Abstract: Each of the metal nano-particles present in a dispersion, which comprises at least one metal selected from the group consisting of precious metals and transition metals or an alloy of at least two metals selected from the foregoing metals, comprises a metal particle in which an organic metal compound of a fatty acid and/or an amine-metal complex is adhered to the periphery of the metal particle. This organic metal compound and the amine-metal complex are admixed together in a solvent and then the resulting mixture is subjected to a reducing treatment to thus form a dispersion containing metal nano-particles in a concentration of not less than 5% by mass and not more than 90% by mass. The resulting dispersion is applied onto the surface of a base material, followed by drying the applied layer of the dispersion and then firing the dried layer of the dispersion at a low temperature to thus form a thin metallic wire or a metal film having conductivity.Type: GrantFiled: September 7, 2004Date of Patent: December 8, 2009Assignees: ULVAC, Inc., JEMCO, Inc.Inventors: Tsutomu Atsuki, Masaaki Oda, Toshiharu Hayashi, Reiko Kiyoshima
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Publication number: 20090295518Abstract: A water atomized Fe powder for a magnetic compact reduced in deformation resistance during molding and annealing temperature for removing strains is provided. A compact having improved magnetic properties is also provided. The water atomized powder containing at least one element selected from Nb, Ta, Ti, Zr and V in an amount of 0.001-0.03 atom % is soft magnetic and has a precipitation in the matrix, which is composed of at least one element selected from Nb, Ta, Ti, Zr and V and oxygen as a main component and has an average size of 0.02-0.5 ?m. Disclosed is a method for manufacturing a soft magnetic powder includes adding at least one element selected from Nb, Ta, Ti, Zr and V, and annealing in a hydrogen-containing reduction atmosphere. This method decrease gaseous impurities, particularly oxygen, and defuse it, to improve the magnetic properties of the powder and compact.Type: ApplicationFiled: May 28, 2009Publication date: December 3, 2009Applicant: Hitachi, Ltd.Inventors: Kazuya Nishi, Yasuhisa Aono
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Patent number: 7625637Abstract: Metallic nanoparticles and processes for forming metallic nanoparticles. In one aspect, the invention is to a process for forming nanoparticles comprising the step of heating a solution comprising a first metal precursor and a nucleating agent (e.g., nucleate nanoparticles or a nucleate precursor) in the presence of a base under conditions effective to form the nanoparticles. The first metal precursor preferably comprises a cationic metal species having a low reduction potential. The invention is also to a nanoparticle or plurality of nanoparticles, each nanoparticle comprising a core having a largest dimension less than about 10 nm; and a metal layer substantially surrounding the core and having a largest dimension less than about 200 nm.Type: GrantFiled: May 31, 2006Date of Patent: December 1, 2009Assignee: Cabot CorporationInventor: Hyungrak Kim
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Publication number: 20090286099Abstract: A silver-coated ball 10 according to the present invention includes: a spherical core 1; and a coating layer 2 including silver superfine particles, which is arranged so as to surround the core 1. The silver superfine particles included in the coating layer 2 have a mean particle size of 1 nm to 50 nm.Type: ApplicationFiled: May 23, 2006Publication date: November 19, 2009Applicant: NEOMAX MATERIALS CO., LTD.Inventors: Ken Asada, Fumiaki Kikui
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Publication number: 20090258244Abstract: A method for producing composite, shelled, alloy and compound nanoparticles as well as nanostructured films of composite, shelled, alloy and compound nanoparticles by using laser ablation of microparticles is disclosed.Type: ApplicationFiled: March 24, 2009Publication date: October 15, 2009Applicant: The Board of Regents, The University of Texas SystemInventors: Michael F. Becker, John W. Keto, Desiderio Kovar
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Patent number: 7579069Abstract: A negative coefficient of thermal expansion particle includes a first bilayer having a first bilayer inner layer and a first bilayer outer layer, and a second bilayer having a second bilayer inner layer and a second bilayer outer layer. The first and second bilayers are joined together along perimeters of the first and second bilayer outer layers and first and second bilayer inner layers, respectively. The first bilayer inner layer and the second bilayer inner layer are made of a first material and the first bilayer outer layer and the second bilayer outer layer are made of a second material. The first material has a greater coefficient of thermal expansion than that of the second material.Type: GrantFiled: November 6, 2003Date of Patent: August 25, 2009Assignee: International Business Machines CorporationInventors: Gareth Geoffrey Hougham, Xiao Hu Liu, S. Jay Chey, James Patrick Doyle, Joseph Zinter, Jr., Michael J. Rooks, Brian Richard Sundlof, Jon Alfred Casey
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Patent number: 7572314Abstract: Carbon-containing nickel-particle powder is provided. The carbon-containing nickel-particle powder has improved shrinkage property when fired due to the presence of carbon. Also, the carbon-containing nickel-particle powder has a very restricted degree of forming agglomerates.Type: GrantFiled: July 9, 2007Date of Patent: August 11, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-young Choi, Soon-ho Kim, Tae-Kyoung Kim, Hak-joon Lee, Seon-mi Yoon
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Publication number: 20090191421Abstract: The present invention relates to a composite soft magnetic powdery material. The composite soft magnetic powdery material includes a strong permanent magnetic powder and a Fe-based soft magnetic powder. The mixing ratio of the Fe-based soft magnetic powder to the strong permanent magnetic powder is from 5:5 to 9:1. The composite soft magnetic powdery material has a magnetic permeability of from 5 to 50.Type: ApplicationFiled: April 18, 2008Publication date: July 30, 2009Applicant: DELTA ELECTRONICS, INC.Inventors: Zhi Huang, Wei Chen, Yi-Lin Chen, Yu-Chin Chen
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Patent number: 7556863Abstract: A process of preparing gold-coated magnetic nanoparticles is disclosed and includes forming a suspension of magnetic nanoparticles within a suitable liquid, adding an amount of a reducible gold compound and a reducing agent to the suspension, and, maintaining the suspension for time sufficient to form gold-coated magnetic nanoparticles.Type: GrantFiled: June 5, 2007Date of Patent: July 7, 2009Assignee: Los Alamos National Security, LLCInventors: Douglas E. Berning, Robert H. Kraus, Jr., Robert W. Atcher, Jurgen G. Schmidt
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Patent number: 7527875Abstract: A group of metal magnetic nanoparticles is provided. The metal magnetic nanoparticle includes a core having a noble metal cluster of a diameter of 3 nm or less; and a metal shell, formed to surround the core, having noble metal atoms randomly distributed therein; wherein the metal shell has a noble metal atom content: (number of noble metal atoms)/(number of whole metal atoms)×100 of 1 to 15 at. %.Type: GrantFiled: May 25, 2005Date of Patent: May 5, 2009Assignee: Sony CorporationInventors: Mikihisa Mizuno, Yuichi Sasaki, Makoto Inoue
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Publication number: 20090104470Abstract: A method of producing an aluminum matrix composite material is described that comprises the steps of: mixing an aluminum powder and a ceramic powder to prepare a mixed powder; providing a lower casing made of aluminum and formed in a hollow rectangular parallelepiped shape having an open top, and a closing member made of aluminum and formed in a shape adapted to hermetically close the open top of the lower casing; packing the mixed powder into the lower casing; closing the open top of the lower casing filled with the mixed powder, by the closing member, to prepare a pre-rolling assembly having the mixed powder hermetically sealed therein; preheating the pre-rolling assembly; and rolling the preheated assembly to obtain the aluminum matrix composite material, where the aluminum matrix composite material includes a pair of metal plates having the mixed powder therebetween.Type: ApplicationFiled: October 23, 2007Publication date: April 23, 2009Inventors: Hideki Suzuki, Kazuto Sanada, Yuichi Tamaki, Toshimasa Nishiyama, Hideki Honmou, Toshiaki Yamazaki
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Publication number: 20090090440Abstract: The compositions of different energetic metallic particles and corresponding coatings are chosen to take advantage of the resulting exothermic alloying reactions when the metals are combined or alloyed through heat activation. Bimetallic particles composed of a core/shell structure of differing metals are chosen such that, upon achieving the melt point for at least one of the metals, a relatively substantial amount of exothermic heat of alloying is liberated. In an embodiment, the core metal is aluminum and the shell metal is nickel. The nickel may be applied to the outer surface of the aluminum particles using an electroless process from a metal salt solution with a reducing agent in an aqueous solution or a solvent media. The aluminum particles may be pretreated with zinc to remove any aluminum oxide. The resulting bimetallic particles may be utilized as an enhanced blast additive by being dispersed within an explosive material.Type: ApplicationFiled: October 4, 2007Publication date: April 9, 2009Applicant: Ensign-Bickford Aerospace & Defense CompanyInventor: Richard M. Kellett
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Patent number: 7510766Abstract: A magnetic composite for AC applications with improved magnetic properties (i.e. low hysteresis losses and low eddy current losses) is disclosed. The composite comprises a consolidation of magnetizable metallic microlamellar particles each having a top and bottom surfaces and opposite ends. The top and bottom surfaces are coated with a dielectric coating for increasing the resistivity of the composite and reducing eddy current losses. The dielectric coating is made of a refractory material and the ends of the lamellar particles are metallurgically bonded to each other to reduce hysteresis losses of the composite. A process for manufacturing the same is also disclosed. The composite is suitable for manufacturing devices for AC applications such as transformers, stator and rotor of motors, generators, alternators, field concentrators, chokes, relays, electromechanical actuators, synchroresolvers, etc.Type: GrantFiled: February 4, 2004Date of Patent: March 31, 2009Assignee: Corporation Imfine Inc.Inventor: Patrick Lemieux
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Publication number: 20090068488Abstract: An object of the present invention is to provide a method for producing granulated metallic iron superior in rust resistance. Another object of the present invention is to provide a method for producing such granulated metallic iron. In the method, the granulated metallic iron is produced by agglomerating a material mixture including an iron-oxide-containing material and a carbonaceous reducing agent; charging and heating the agglomerated material mixture in a moving hearth-type reducing furnace to reduce the iron oxide in the material mixture with the carbonaceous reducing agent to obtain hot granulated metallic iron; and cooling the hot granulated metallic iron, wherein the hot granulated metallic iron is cooled while its relative position is changed; and an oxide coating is formed on the surface of the hot granulated metallic iron by bringing moisture into contact with almost the entire surface of the hot granulated metallic iron.Type: ApplicationFiled: March 24, 2006Publication date: March 12, 2009Applicant: Mesabi Nugget LLCInventors: Koji Tokuda, Osamu Tsuge