Free Metal Or Alloy Containing Patents (Class 252/62.55)
  • Patent number: 11342099
    Abstract: Disclosed is a surface modification technique for permanent magnetic materials. First, a sintered Nd—Fe—B magnet is immersed in a chlorine-containing solution to corrode its surface after the sintered Nd—Fe—B magnet is ground, polished and cleaned, so that atomic vacancies or gaps are produced at the grain boundaries in the surface layer of the corroded sintered Nd—Fe—B magnet; then, compound nanopowders coated on the surface of the sintered Nd—Fe—B magnet are implanted into the grain boundaries by laser shock peening to obtain a gradient nanostructure layer along the depth direction; at the same time, the surface nanocrystallization of the sintered Nd—Fe—B magnet and a residual compressive stress layer are induced by laser shock peening which remarkably improves the corrosion resistance of the sintered Nd—Fe—B magnet.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: May 24, 2022
    Inventors: Kaiyu Luo, Changyu Wang, Fang Wang, Yefang Yin, Xiaohong Xu, Jinzhong Lu
  • Patent number: 11302467
    Abstract: Modified surfaces of the present disclosure include a surface or substrate material, a magnetic field, which may be generated through the use of a magnet placed at a distance beneath the surface or substrate, or placed above the surface or substrate, or through the use of a magnetic surface or substrate, and a magnetic fluid, such as ferrofluid or ferrogel, deposited in a layer on the top of the surface or substrate. The modified surfaces may be icephobic. In addition, a droplet of liquid placed on the modified surface can be manipulated through placement of a local heat source in proximity to the droplet, without contacting the droplet.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: April 12, 2022
    Assignee: UNIVERSITY OF HOUSTON SYSTEM
    Inventors: Hadi Ghasemi, Peyman Irajizad, Munib Hasnain
  • Patent number: 11264154
    Abstract: A rare earth permanent magnet includes a main phase containing: a rare earth element R of one or more types including Nd; an element L of one or more types selected from a group consisting of Co, Be, Li, Al, and Si; B; and Fe, wherein crystals which form the main phase belong to P42/mnm; some of B atoms occupying a 4f site of the crystals are substituted with atoms of the element L; each distribution of Nd atoms and the atoms of the element L appears along a C-axis direction of the crystals in a plurality of cycles; and the rare earth permanent magnet includes an area where a cycle of the atoms of the element L matches a cycle of the Nd atoms.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: March 1, 2022
    Assignee: IHI Corporation
    Inventors: Natsuki Yoneyama, Haruki Eguchi, Hidekazu Tomono, Isao Nakanowatari, Keisuke Nagao
  • Patent number: 11158444
    Abstract: A magnetic material may be fabricated with a plurality of magnetic filler particles dispersed within a carrier material, wherein at last one of the magnetic filler particles may comprise a ferromagnetic core coated with an inert material to form a shell surrounding the ferromagnetic core. Such a coating may allow for the use of ferromagnetic materials for forming embedded inductors in package substrates without the risk of being incompatible with fabrication processes used to form these package substrates.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: October 26, 2021
    Assignee: Intel Corporation
    Inventors: Brandon C. Marin, Frank Truong, Shivasubramanian Balasubramanian
  • Patent number: 11087907
    Abstract: A method is provided for producing an artificial permanent magnet, in a powder preparation step a main phase powder, which includes a rare-earth transition metal compound with permanently magnetic properties and has a first average particle size, is prepared and an anisotropic powder, which has a higher anisotropy field strength than the main phase powder and has a second average particle size, is prepared, wherein the second average particle size is smaller than the first average particle size. In a subsequent powder mixing step, the main phase powder and the anisotropic powder are mixed together to form a powder mixture and, in a subsequent heat treatment step, this powder mixture with the main phase powder of the first average particle size and with the anisotropic powder of the second average particle size is sintered to form an artificial permanent magnet.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: August 10, 2021
    Assignee: TECHNISCHE UNIVERSITÄT DARMSTADT
    Inventors: Konrad Löwe, Wilhelm Fernengel, Konstantin Skokov, Oliver Gutfleisch
  • Patent number: 11087922
    Abstract: A method for producing a rare earth magnet, including preparing a melt of a first alloy having a composition represented by (R1vR2wR3x)yTzBsM1t (wherein R1 is a light rare earth element, R2 is an intermediate rare earth element, R3 is a heavy rare earth element, T is an iron group element, and M1 is an impurity element, etc.), cooling the melt of the first alloy at a rate of from 100 to 102 K/sec to obtain a first alloy ingot, pulverizing the first alloy ingot to obtain a first alloy powder having a particle diameter of 1 to 20 ?m, preparing a melt of a second alloy having a composition represented by (R4pR5q)100-uM2u (wherein R4 is a light rare earth element, R5 is an intermediate or heavy rare earth element, M2 is an alloy element, etc.), and putting the first alloy powder into contact with the melt of the second alloy.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: August 10, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaaki Ito, Noritsugu Sakuma, Masao Yano, Hidefumi Kishimoto, Tetsuya Shoji
  • Patent number: 11053135
    Abstract: Producing CoxFe100-x, where x is an integer from 20 to 95, nanoparticles by: (a) providing a first aqueous hydroxide solution; (b) preparing a second aqueous solution containing iron ions and cobalt ions; and (c) depositing measured volumes of the second aqueous solution into the first aqueous solution whereby coprecipitation yields CoFe alloy nanoparticles, wherein step (c) occurs in an essentially oxygen-free environment. The nanoparticles are annealed at ambient temperatures to yield soft nanoparticles with targeted particle size, saturation magnetization and coercivity. The chemical composition, crystal structure and homogeneity are controlled at the atomic level. The CoFe magnetic nanoparticles have Ms of 200-235 emu/g, (Hc) coercivity of 18 to 36 Oe and size range of 5-40 nm.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: July 6, 2021
    Assignee: Aegis Technology Inc.
    Inventors: Qi Chen, Zhigang Lin
  • Patent number: 11021624
    Abstract: An oil-based magnetic ink can be provided that has low viscosity and improved storage stability. Specifically disclosed is an oil-based magnetic ink containing a magnetic pigment that contains a ferrite, a pigment dispersant A that has an acid value but has no base value, a pigment dispersant B that has an acid value and a base value, and a non-aqueous solvent. One example of the pigment dispersant A is at least one compound selected from the group consisting of hydroxystearic acid and polyhydroxystearic acid. One example of the pigment dispersant B has an acid value of at least 5 mgKOH/g.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: June 1, 2021
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Kenji Yamada, Naofumi Ezaki, Yoshifumi Watanabe
  • Patent number: 10923255
    Abstract: A magnetic material is expressed by a composition formula: (R1-xZx)aMbTc, and includes a main phase having a ThMn12 crystal structure. In the ThMn12 crystal structure, when an amount of the element Z occupying 2a site is Z2a atomic percent, an amount of the element Z occupying 8i site is Z8i atomic percent, an amount of the element Z occupying 8j site is Z8j atomic percent, and an amount of the element Z occupying 8f site is Z8f atomic percent, Z2a, Z8i, Z8j, and Z8f satisfy (Z8i+Z8j+Z8f)/(Z2a+Z8i+Z8j+Z8f)<0.1.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: February 16, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Naoyuki Sanada, Masaya Hagiwara, Shinya Sakurada
  • Patent number: 10784029
    Abstract: An object of the present invention is to provide an R-T-B based permanent magnet having a low coercive force and a low magnetizing field, and having a high residual magnetic flux density and a high minor curve flatness even in the low magnetizing field. Provided is an R-T-B based permanent magnet including a main phase including a compound having an R2T14B type tetragonal structure and a grain boundary phase existing between the main phases, in which R is at least one rare earth element including scandium and yttrium, T is at least one transition metal element including iron, or at least two transition metal elements including iron and cobalt, the grain boundary includes an R-T-B—C based compound having a higher R concentration, B concentration and C concentration than that of the main phase and having a lower T concentration than that of the main phase.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: September 22, 2020
    Assignee: TDK CORPORATION
    Inventors: Keiji Takeda, Shota Miyazaki
  • Patent number: 10661253
    Abstract: The present invention provides a process for in-situ preparation of metal oxide(s) comprising the step of precipitating a metal salt solution with Fehling's reagent B and glucose at a suitable temperature. The metal oxide(s) prepared according to the present invention can be used for diverse applications including their utility as catalyst(s) in one or more reactions. The present invention further provides a highly selective bi-functional hybrid catalyst for direct conversion of syn-gas to dimethyl ether (DME) and methods of preparation thereof. The one or more metal oxide(s) can be directly obtained from the metal precursors following the method(s) of the present invention instead of metal hydroxides as in conventional known methods, thereby eliminating the necessity of high temperature calcination step(s) and rigorous reduction procedure(s).
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: May 26, 2020
    Assignee: BHARAT PETROLEUM CORPORATION
    Inventors: Sonal Asthana, Chanchal Samanta, Ravi Kumar Voolapalli, Sanjay Bhargava, Basudeb Saha
  • Patent number: 10655399
    Abstract: A metal matrix composite (MMC) may be formed with two or more portions each having different reinforcing particles that enhance strength, wear resistance, or both of their respective portions of the MMC. Selective placement of the different reinforcing particles may be achieved using magnetic members. For example, in some instances, forming an MMC may involve placing reinforcement materials within an infiltration chamber of a mold assembly, the reinforcement materials comprising magnetic reinforcing particles and non-magnetic reinforcing particles; positioning one or more magnetic members relative to the mold assembly to selectively locate the magnetic reinforcing particles within the infiltration chamber with respect to the non-magnetic reinforcing particles; and infiltrating the reinforcement materials with a binder material to form a hard composite.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: May 19, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Grant O. Cook, III, Jeffrey G. Thomas, Garrett T. Olsen, Seth Garrett Anderle
  • Patent number: 10614937
    Abstract: An R-T-B based rare earth permanent magnet is expressed by formula: (R11-x(Y1-y-z Cey Laz)x)aTbBcMd in which, R1 is one or more kinds of rare earth element not including Y, Ce and La, “T” is one or more kinds of transition metal, and includes Fe or Fe and Co as an essential component, “M” is an element having Ga or Ga and one or more of Sn, Bi and Si, 0.4?x?0.7, 0.00?y+z?0.20, 0.16?a/b?0.28, 0.050?c/b?0.070, 0.005?d/b?0.028, 0.25?(a-2c)/(b-14c)?2.00 and 0.025?d/(b-14c)?0.500. The magnet has a structure having a main phase, having a compound having a R2T14B type tetragonal structure, and a grain boundary phase, on an arbitrary cross sectional area, an area ratio of R-T-M, T-rich and R-rich phases, with respect to a total grain boundary phase area is 10.0% or more, 60.0% or less and 70.0% or less, respectively, and the coating rate of the grain boundary phase is 70.0% or more.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: April 7, 2020
    Assignee: TDK CORPORATION
    Inventors: Shota Miyazaki, Keiji Takeda
  • Patent number: 10566117
    Abstract: An R-T-B based rare earth permanent magnet is expressed by a compositional formula: (R11?x(Y1?y?z Cey Laz)x)aTbBcMd in which R1 is one or more kinds of rare earth element not including Y, Ce and La, “T” is one or more kinds of transition metal, and includes Fe or Fe and Co as an essential component, “M” is an element having Ga or Ga and one or more kinds selected from Sn, Bi and Si, and 0.4?x?0.7, 0.00?y+z?0.20, 0.16?a/b?0.28, 0.050?c/b?0.075 and 0.005?d/b?0.028. The magnet includes a main phase, including a compound having a R2T14B type tetragonal structure, and a grain boundary phase. D10, D50, D90 of crystal grain diameter according to the main phase crystal grains satisfies the following formula: D50?4.00 ?m and (D90?D10)/D50?1.60. A coating rate of the grain boundary is 70.0% or more.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 18, 2020
    Assignee: TDK CORPORATION
    Inventors: Keiji Takeda, Shota Miyazaki
  • Patent number: 10522275
    Abstract: A method for producing a nanoheterostructured permanent magnet includes a first step of preparing a raw material solution by dissolving, in a solvent, (1) a block copolymer comprising polymer block components that are immiscible but linked to each other, (2) a first inorganic precursor which is one of a hard magnetic material precursor and a soft magnetic material precursor, and (3) a second inorganic precursor which is the other of the hard magnetic material precursor and the soft magnetic material precursor, and a second step including a phase-separation treatment for forming a nanophase-separated, a conversion treatment for converting the hard magnetic material precursor and the soft magnetic material precursor to a hard magnetic material and a soft magnetic material, respectively, and a removal treatment for removing the block copolymer from the nanophase-separated structure.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: December 31, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hiroaki Wakayama, Hirotaka Yonekura, Yasuaki Kawai
  • Patent number: 10458039
    Abstract: The fabrication of asymmetric monometallic nanocrystals with novel properties for plasmonics, nanophotonics and nanoelectronics. Asymmetric monometallic plasmonic nanocrystals are of both fundamental synthetic challenge and practical significance. In an example, a thiol-ligand mediated growth strategy that enables the synthesis of unprecedented Au Nanorod-Au Nanoparticle (AuNR-AuNP) dimers from pre-synthesized AuNR seeds. Using high-resolution electron microscopy and tomography, crystal structure and three-dimensional morphology of the dimer, as well as the growth pathway of the AuNP on the AuNR seed, was investigated for this example. The dimer exhibits an extraordinary broadband optical extinction spectrum spanning the UV, visible, and near infrared regions (300-1300 nm). This unexpected property makes the AuNR-AuNP dimer example useful for many nanophotonic applications.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 29, 2019
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Yu Han, Jianfeng Huang, Yihan Zhu
  • Patent number: 10438742
    Abstract: A manufacturing method of a rare-earth magnet includes: manufacturing a sintered body having by performing pressing on a magnetic powder for a rare-earth magnet; and manufacturing a rare-earth magnet by putting the sintered body in a plastic working mold and by performing hot plastic working on the sintered body while pressing the sintered body to give anisotropy to the sintered body. The sintered body has a cuboid shape and includes at least one recessed side face that has a recessed portion curved inward. The plastic working mold includes a lower die, a side die forming a rectangular frame of four side faces, and an upper die slidable in the side die. The hot plastic working is hot upsetting.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: October 8, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Dai Kobuchi, Eisuke Hoshina, Daisuke Ichigosaki, Osamu Yamashita
  • Patent number: 10421695
    Abstract: A new class of energetic nanoparticles, and a method to produce the same. The energetic nanoparticles are differentiated from other metallic energetic nanoparticles by their core-shell nanostructure including an intermediate boride layer that provides oxidation protection and acts as an active mass. An intermetallic reaction occurs between aluminum and nickel. Aluminum based nanoparticles were used for the examples, but the principle is applicable to other materials as well.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: September 24, 2019
    Assignee: NEI Corporation
    Inventors: Mohit Jain, Biju Mathew
  • Patent number: 10335775
    Abstract: The present invention discloses an iron-based nitrogen doped graphene catalyst, process for preparation thereof and use of said catalyst in oxidant-free catalytic dehydrogenation of alcohols and amines to the corresponding carbonyl compounds, amines and N-heterocylic compounds with extraction of molecular hydrogen as the only by-product.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: July 2, 2019
    Assignee: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Ekambaram Balaraman, Dinesh Jagadeesan, Garima Jaiswal, Sanjay Pandurang Borikar
  • Patent number: 10207323
    Abstract: A composite magnetic material includes a plurality of soft-magnetic metal powders, a first oxide that covers a surface of each of the plurality of soft-magnetic metal powders, and a second oxide that covers a surface of the first oxide and is interposed among the plurality of soft-magnetic metal powders each coated with the first oxide. The first oxide has a first recess in a surface, and the second oxide is provided in the first recess. With this configuration, peeling between the first oxide and the second oxide can be prevented, so that the composite magnetic material having high mechanical strength can be provided.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: February 19, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Nobuya Matsutani, Takeshi Takahashi, Junichi Kotani
  • Patent number: 10189204
    Abstract: Techniques and compositions are disclosed for composite feedstocks with powder/binder systems suitable for three-dimensional printing, such as fused filament fabrication. The composite feedstocks may include a jacket about a core, with at least the core including a powder material suspended in a binder system and the jacket having a hardness or toughness greater than a hardness or toughness of the core for the feedstock. In general, the harder jacket may protect the core from unintended deformation or damage during transportation, storage, or use. For example, the difference in hardness or toughness between the jacket and the core may facilitate gripping the feedstock (e.g., by gear drives or the like) with a higher amount of force than is otherwise applicable if the feedstock were composed of the core alone, without damaging the core, during a fused filament fabrication process or another additive manufacturing process.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: January 29, 2019
    Assignee: Desktop Metal, Inc.
    Inventors: Ricardo Fulop, Michael Andrew Gibson, Richard Remo Fontana, Animesh Bose, Jonah Samuel Myerberg
  • Patent number: 10166605
    Abstract: The problem addressed by the present invention is providing a method for producing microparticles. At least two fluids to be processed, a raw material fluid that contains a raw material and a processing fluid that contains a substance for processing the raw material are mixed in a thin film fluid formed between at least two surfaces for processing that are disposed so as to face each other, that can approach and separate from each other and at least one of which rotates relative to the other, and microparticles of the raw material that is processed are obtained. At this time, the proportion of the microparticles of the raw material which has been processed that coalesces with each other is controlled by controlling the circumferential speed of the rotation in a confluence section in which the raw material fluid and processing fluid flow together.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: January 1, 2019
    Assignee: M. TECHNIQUE CO., LTD.
    Inventor: Masakazu Enomura
  • Patent number: 10158276
    Abstract: A rotor production method includes: a first step of arranging a plurality of sintered bodies side by side with an insulating lubricant applied to an interface of at least one of the sintered bodies adjacent to each other, and then housing the sintered bodies in a cavity of a molding die such that the sintered bodies are arranged side by side in the cavity, the sintered bodies being precursors of a plurality of split magnets constituting one rare-earth magnet; a second step of turning the sintered bodies into the split magnets by performing hot working to impart magnetic anisotropy to the sintered bodies arranged in the cavity, and producing an integrated magnet in which the split magnets are integrated together with the lubricant interposed therebetween; and a third step of producing a rotor of a motor by inserting the integrated magnet into a magnet slot of the rotor.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: December 18, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Osamu Yamashita
  • Patent number: 9915448
    Abstract: A heat pump includes a magnet assembly which creates a magnetic field, and a regenerator housing which includes a body defining a plurality of chambers, each of the plurality of chambers extending along a transverse direction orthogonal to the vertical direction. The heat pump further includes a plurality of stages, each of the plurality of stages including a magnetocaloric material disposed within one of the plurality of chambers and extending along the transverse direction between a first end and a second end.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: March 13, 2018
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Michael Alexander Benedict, David G. Beers, Brian Michael Schork, Michael Goodman Schroeder
  • Patent number: 9859044
    Abstract: The powder magnetic core of the present invention can exhibit reliable superposition property in which variance rate of inductance value is small even if superposed current is varied, and can reduce the number of cores used in a reactor. The powder magnetic core comprises: soft magnetic powder particles, and gaps between the soft magnetic powder particles, in which the powder magnetic core has a density ratio of 90 to 95%, and when observing a cross section thereof, layered gaps having thicknesses of 1 to 3 ?m and widths of 20 to 200 ?m are formed inside of the powder magnetic core. It is desirable that the layered gaps be not less than 50% of all the gaps in a cross sectional area ratio.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: January 2, 2018
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Inagaki, Hiroaki Kondo, Chio Ishihara
  • Patent number: 9815742
    Abstract: An oxide ceramic having a principal component formed of a ferrite compound containing at least Sr, Co, and Fe, and zirconium in an amount of 0.05 to 1.0 wt. % on an oxide equivalent basis, and a ceramic electronic component using the oxide ceramic.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: November 14, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Sakyo Hirose, Tsuyoshi Kimura
  • Patent number: 9800095
    Abstract: Core shell nanoparticles of an iron-cobalt alloy core, a silicon dioxide shell and a metal silicate interface between the core and the shell are provided. The magnetic properties of the nanoparticles are tunable by control of the interface thickness. A magnetic core of high magnetic moment obtained by compression sintering the thermally annealed superparamagnetic core shell nanoparticles is also provided. The magnetic core has little core loss due to hysteresis or eddy current flow.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: October 24, 2017
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Michael Paul Rowe, Ryan Daniel Desautels
  • Patent number: 9734947
    Abstract: A strip cast alloy containing Nd in excess of the stoichiometry of Nd2Fe14B is subjected to HDDR treatment and diffusion treatment, yielding microcrystalline alloy powder in which major phase crystal grains with a size of 0.1-1 ?m are surrounded by Nd-rich grain boundary phase with a width of 2-10 nm. The powder is finely pulverized, compacted, and sintered, yielding a sintered magnet having a high coercivity.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: August 15, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Hajime Nakamura
  • Patent number: 9704613
    Abstract: Polymer composites that are suitable for use as electromagnetic interference mitigaters include a lossy polymeric matrix, ceramic particles dispersed within the polymeric matrix, and conductive particles dispersed within the polymeric matrix. The lossy polymeric matrix may be a fluorocarbon-based polymer matrix, or an epoxy-based polymer matrix. The ceramic particles may be metal oxide particles, especially copper oxide (CuO) particles. The conductive particles may be carbon black. Other electromagnetic interference mitigating polymer matrices include a lossy polymeric matrix and copper oxide (CuO) particles dispersed within the polymeric matrix.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: July 11, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Dipankar Ghosh, Biplab K. Roy, Nitin S. Satarkar
  • Patent number: 9666340
    Abstract: A composite article (1; 10; 40) comprises a plurality of inclusions (5) of a magnetocalorically active material embedded in a matrix (4) of a magnetocalorically passive material. The inclusions (5) and the matrix (4) have a microstructure characteristic of a compacted powder.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: May 30, 2017
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Georg Werner Reppel, Matthias Katter
  • Patent number: 9631962
    Abstract: A flowtube assembly for a magnetic flowmeter is provided. The flowtube assembly includes a flowtube configured to receive a flow of process fluid. A magnetic core is mounted relative to the flowtube and includes a plurality of layers of a magnetically permeable material. Each layer is substantially planar and is electrically insulated from others of the plurality of layers. A coil is disposed to generate a magnetic field having field lines that are substantially orthogonal to the plane of each layer.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: April 25, 2017
    Assignee: Rosemount Inc.
    Inventors: Bruce D. Rovner, Samuel E. Messenger, Jared J. Dreier, John C. Beyl
  • Patent number: 9601249
    Abstract: The objective is to provide a soft magnetic metal powder-compact magnetic core and a reactor with an excellent DC superposition characteristic. The soft magnetic metal powder-compact magnetic core contains a soft magnetic metal powder, boron nitride and a silicon compound, when its section is ground and then observed, the ratio of the area occupied by the soft magnetic metal powder to that of the section of the soft magnetic metal powder-compact magnetic core is 90% or more and 95% or less, and a roundness of the section of 80% or more of the particles constituting the soft magnetic metal powder is 0.75 or more and 1.0 or less, and boron nitride exists in 70% or more of the voids-among-multiple-particles among the voids-among-multiple-particles in the section of the soft magnetic metal powder-compact magnetic core. Thus, the soft magnetic metal powder-compact magnetic core with an excellent DC superposition characteristic can be obtained.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: March 21, 2017
    Assignee: TDK CORPORATION
    Inventors: Yusuke Taniguchi, Tomofumi Kuroda, Yu Sakurai
  • Patent number: 9568496
    Abstract: The invention is notably directed to a scanning probe sensor for a scanning probe microscope. The scanning probe sensor comprises a probe tip having a ferromagnetic fluid and a magnetic field generator adapted to generate a magnetic field acting on the ferromagnetic fluid. Furthermore, a sensor controller is provided and configured to control one or more parameters of the magnetic field generator, thereby controlling the shape of the fluid. The invention further concerns a related scanning probe sensor, a related method and a related computer program product.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: February 14, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Bernd W. Gotsmann, Fabian Menges, Pio Peter Niraj Niramalraj
  • Patent number: 9552910
    Abstract: A ferrite magnet with salt includes 40 to 99.9 weight % of ferrite and 0.1 to 60 weight % of salt, wherein the salt has a melting point lower than a synthetic temperature of the ferrite, and the salt is melted to form a matrix between the ferrite particles, and a manufacturing thereof. The ferrite magnet with salt has advantages in terms of process conditions due to fast synthesis reaction at low temperatures compared to typical magnets, easily obtaining nano-sized particles having high crystallinity, preventing cohesion between particles and particle growth by molten salt, allowing sintering at temperatures lower than typical during the molding and sintering processes for producing a ferrite magnet with salt due to synthesized ferrite magnetic powder with salt thus preventing the deterioration of magnetic characteristics due to particle growth, and allowing alignment in the direction of magnetization easy axis to obtain higher magnetic characteristics.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: January 24, 2017
    Assignees: LG ELECTRONICS INC., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS
    Inventors: Namseok Kang, Jinbae Kim, Yongho Choa, Jongyoul Kim, Gukhwan An, Sanggeun Cho
  • Patent number: 9523499
    Abstract: The disclosure provides an oxygen carrier for a chemical looping cycle, such as the chemical looping combustion of solid carbonaceous fuels, such as coal, coke, coal and biomass char, and the like. The oxygen carrier is comprised of at least 24 weight % (wt %) CuO, at least 10 wt % Fe2O3, and an inert support, and is typically a calcine. The oxygen carrier exhibits a CuO crystalline structure and an absence of iron oxide crystalline structures under XRD crystallography, and provides an improved and sustained combustion reactivity in the temperature range of 600° C.-1000° C. particularly for solid fuels such as carbon and coal.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: December 20, 2016
    Assignee: U.S. Department of Energy
    Inventors: Ranjani V. Siriwardane, Hanjing Tian
  • Patent number: 9450242
    Abstract: A method for manufacturing a nanostructured metal oxide calcinate suitable for biosensor through a procedure of redox reaction is disclosed in this invention. The nanostructured metal oxide calcinate is free of impurities and produced with better electrocatalytic activity and better conductivity. Thus, an electrode of biosensor can be modified via the nanostructured metal oxide calcinate. The method for manufacturing the nanostructured metal oxide calcinate includes: disposing a first metal material and a second metal material into a reaction slot and making the first metal material and the second metal material dissolved within a solvent to form a mixture, wherein the pH value of the mixture ranges between 0 to 7, the mixture performs a redox reaction process for obtaining a metal oxide material; and eventually calcining the metal oxide material for obtaining a nanostructured metal oxide calcinate.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: September 20, 2016
    Assignee: NATIONAL SUN YAT-SEN UNIVERSITY
    Inventors: Chun-Hu Chen, Cheng-Chi Kuo, Wen-Jie Lan
  • Patent number: 9278861
    Abstract: The invention relates to a method for the carbon coating of metallic nanoparticles. The metallic nanoparticles, which are produced using the metal-salt hydrogen-reduction method, can be coated with carbon by adding a hydrocarbon (for example, ethylene, ethane, or acetylene) to the hydrogen using in the synthesis. The carbon layer protects the metallic particles from oxidation, which greatly facilitates the handling and further processing of the particles. By altering the concentration of the hydrocarbon, it is possible, in addition, to influence the size of the metallic particles created, because the coating takes place simultaneously with the creation of the particles, thus stopping the growth process. A carbon coating at most two graphene layers thick behaves like a semiconductor. As a thicker layer, the coating is a conductor. If the hydrocarbon concentration is further increased, a metal-CNT composite material is formed in the process.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: March 8, 2016
    Inventors: Ari Auvinen, Jorma Jokiniemi, Johanna Forsman, Pipsa Mattila, Unto Tapper
  • Patent number: 9263174
    Abstract: Disclosed herein is a sintered cobalt ferrite composite material comprising of nano and micron sized powders of cobalt ferrite with high magnetostriction. The present invention further discloses preparation of nano and micron sized powders of cobalt ferrite, in particular, the auto combustion process using glycine as fuel for preparing nano sized cobalt ferrite powders.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: February 16, 2016
    Assignee: Council of Scientific and Industrial Research
    Inventors: Alias Joy Pattayil, Mohaideen Kamal Khaja
  • Patent number: 9153368
    Abstract: A composite iron-based powder suitable for soft magnetic applications such as inductor cores. Also, a method for producing a soft magnetic component and the component produced by the method.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: October 6, 2015
    Assignee: HOGANAS AB (PUBL)
    Inventors: Zhou Ye, Hanna Staffansson
  • Patent number: 9136049
    Abstract: This invention relates to Mn—Al magnetic powders of a high coercive force which are obtained from Mn—Al alloy vaporized by plasma arc discharging, and a manufacturing method thereof. The Mn—Al magnetic powders are produced by discharging a plasma arc to a compact which is formed by compacting a blend containing 20-60% by weight of Mn powder and 40-80% by weight of Al powder, collecting nanoscale Mn—Al particles after cooling the vaporized blend, and heat-treating the particles. According to the present invention, the Mn—Al magnetic powders of light weight and enhanced corrosion resistance are produced at a low cost.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: September 15, 2015
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Jung-Goo Lee, Chul-Jin Choi
  • Patent number: 9053955
    Abstract: A nitride semiconductor device includes a dislocation control layer on a substrate, and a nitride semiconductor layer on the dislocation control layer. The dislocation control layer includes a nanocomposite of a first nanoparticle made of a first material and at least one second nanoparticle made of a second material.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: June 9, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Moon-sang Lee, Sung-soo Park, Dae-ho Yoon
  • Publication number: 20150144832
    Abstract: A crystalline ferromagnetic material based upon nanoscale cobalt carbide particles and a method of manufacturing the material via a polyol reaction are disclosed. The crystalline ferromagnetic cobalt carbide nanoparticles are useful for high performance permanent magnet applications. The processes are extendable to other carbide phases. Fe- and FeCo-carbides are realizable by using as precursor salts Fe-, Co-, and mixtures of Fe- and Co-salts, such as acetates, nitrates, chlorides, bromides, citrates, and sulfates. The materials include mixtures and/or admixtures of cobalt carbides, as both Co2C and Co3C phases. Mixtures may be a collection of independent particles of Co2C and Co3C or a collection of particles which consist of an intimate combination of Co2C and Co3C phases within individual particles. The relative proportions of these two phases and the morphology of each phase contribute to their permanent magnet properties, particularly at room temperature to over 400 K.
    Type: Application
    Filed: February 5, 2015
    Publication date: May 28, 2015
    Inventor: Vincent G. Harris
  • Publication number: 20150147680
    Abstract: The present invention relates to highly functional composite nanoparticles including a support body formed of nanoparticles and first phase nanoparticles which are condensed on the surfaces of the support body particles after being evaporated through a physical vapor deposition process, and to a method for producing same. According to the present invention, a physical vapor deposition process is used instead of a wet process so as to produce eco-friendly composite nanoparticles that do not emit hazardous chemicals while having high economic feasibility and process reproducibility.
    Type: Application
    Filed: March 26, 2013
    Publication date: May 28, 2015
    Inventors: Han-Shin Choi, Hye-Sook Joo, Chul-Woong Han
  • Publication number: 20150144831
    Abstract: Biogenic activated carbon compositions disclosed herein comprise at least 55 wt % carbon, some of which may be present as graphene, and have high surface areas, such as Iodine Numbers of greater than 2000. Some embodiments provide biogenic activated carbon that is responsive to a magnetic field. A continuous process for producing biogenic activated carbon comprises countercurrently contacting, by mechanical means, a feedstock with a vapor stream comprising an activation agent including water and/or carbon dioxide; removing vapor from the reaction zone; recycling at least some of the separated vapor stream, or a thermally treated form thereof, to an inlet of the reaction zone(s) and/or to the feedstock; and recovering solids from the reaction zone(s) as biogenic activated carbon. Methods of using the biogenic activated carbon are disclosed.
    Type: Application
    Filed: May 7, 2013
    Publication date: May 28, 2015
    Inventors: James A. Mennell, Daniel J. Despen
  • Patent number: 9039920
    Abstract: There are provided a permanent magnet and a manufacturing method thereof enabling carbon content contained in magnet particles to be reduced in advance before sintering even when wet milling is employed. Coarsely-milled magnet powder is further milled by a bead mill in a solvent together with an organometallic compound expressed with a structural formula of M-(OR)X (M represents V, Mo, Zr, Ta Ti W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, X represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the magnet powder. Thereafter, a compact body of compacted magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius to perform hydrogen calcination process. Thereafter, through sintering process, a permanent magnet 1 is formed.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: May 26, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Izumi Ozeki, Katsuya Kume, Keisuke Hirano, Tomohiro Omure, Keisuke Taihaku, Takashi Ozaki
  • Patent number: 9040158
    Abstract: A generic route for synthesis of asymmetric nanostructures. This approach utilizes submicron magnetic particles (Fe3O4—SiO2) as recyclable solid substrates for the assembly of asymmetric nanostructures and purification of the final product. Importantly, an additional SiO2 layer is employed as a mediation layer to allow for selective modification of target nanoparticles. The partially patched nanoparticles are used as building blocks for different kinds of complex asymmetric nanostructures that cannot be fabricated by conventional approaches. The potential applications such as ultra-sensitive substrates for surface enhanced Raman scattering (SERS) have been included.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: May 26, 2015
    Assignee: UChicago Argonne LLC
    Inventors: Yugang Sun, Yongxing Hu
  • Publication number: 20150137024
    Abstract: A metal-carbon nanotube composite is provided which includes a carbon nanotube, a magnetic material, and a metal and in which the carbon nanotube is bound to the magnetic material through a binding intervenor and the carbon nanotube is dispersed in the metal by binding the magnetic material to the metal. A preparing method of a metal-carbon nanotube composite is provided, the method including: a step of binding a carbon nanotube to a magnetic material through a binding intervenor; and a step of dispersing the carbon nanotube in a metal by binding the magnetic material to the metal.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 21, 2015
    Applicants: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY, JC CORP.
    Inventors: Donghyun LEE, Seungyong SON, Doo Kyoo KIM, Ki Chull SHIN
  • Publication number: 20150129794
    Abstract: In a manufacturing method of a soft magnetic member, a material powder that includes ferrous particles and an organic layer formed on a surface of each of the ferrous particles is prepared. The organic layer contains at least one element selected from the group consisting of Si, Mg, Ti, and V. The material powder is compacted to form a green compact, and the green compact is induction-heated with a frequency of 100 kHz or higher to form an insulation layer made of an oxide containing the element on the surface of each of the ferrous particles.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 14, 2015
    Inventors: Eiichi KOBAYASHI, Kunihiro KODAMA, Masashi TOTOKAWA, Satoshi TAKEUCHI
  • Patent number: 9028705
    Abstract: A capsule having a solid core, a primary shell of liquid encapsulating the solid core and a secondary shell of particles encapsulating the primary shell. The primary and secondary shells are generally repulsive to each other. Also provided is a process for the manufacture of capsules and a process for the manufacture of a magnetic body.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: May 12, 2015
    Assignee: Magnequench Limited
    Inventors: Zhao Wei, Han Zhisan, David Miller
  • Publication number: 20150123025
    Abstract: What is described is the use of alcohols, alcoholamines, diols, polyols or mixtures thereof in heat carrier media or as heat carrier media which are in contact with magnetocaloric materials.
    Type: Application
    Filed: December 18, 2014
    Publication date: May 7, 2015
    Inventors: Fabian Seeler, Georg Degen