Patents Assigned to National Institute for Materials Science
  • Patent number: 10026585
    Abstract: The emitter of the present invention includes a nanowire. The nanowire is formed from a hafnium carbide (HfC) single crystal, and at least an end portion of the hafnium carbide single crystal, from which electrons are to be emitted, is covered with hafnium oxide (HfO2). In the emitter, the thickness of the hafnium oxide may be 1 nm to 20 nm.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: July 17, 2018
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Jie Tang, Jinshi Yuan, Han Zhang, Luchang Qin
  • Patent number: 10026989
    Abstract: An Object of the invention is to obtain an all solid lithium battery having an excellent output performance. To achieve the object, a sulfide based solid electrolyte is used as an electrolyte; an oxide containing lithium, a metal element that acts as a redox couple, and a metal element that forms an electron-insulating oxide is used as a cathode active material; and the concentration of the metal element that forms the electron-insulating oxide on the surface of the cathode active material (oxide) that is in contact with the sulfide solid electrolyte is made high.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: July 17, 2018
    Assignees: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazunori Takada, Xiaoxiong Xu, Tsuyoshi Ohnishi, Isao Sakaguchi, Ken Watanabe, Yasushi Tsuchida, Yukiyoshi Ueno, Koji Kawamoto
  • Patent number: 10017387
    Abstract: A boron nitride fine particle has low major diameter/thickness (aspect) ratio, high purity and high crystallinity, and also has an average particle diameter of 0.05 to 2.0 ?m, a graphitization index of 3 or less, and a total oxygen content of 0.20% by mass or less, with an average value of a major diameter/thickness ratio of scaly particles being 6.0 or less. A method of producing a boron nitride fine particle includes introducing ammonia and an alkoxide borate at an ammonia/alkoxide borate molar ratio of 1 to 5 in a reaction vessel in an inert gas atmosphere for heating at 800 to 1,350° C. within 30 seconds thereby obtaining a boron nitride precursor, and then heating the boron nitride precursor at 1,650 to 2,200° C. for at least 0.5 hour in an inert gas atmosphere.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: July 10, 2018
    Assignees: DENKA COMPANY LIMITED, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Fumihiro Kurokawa, Seitaro Kobayashi, Takashi Kawasaki, Go Takeda, Yoshio Bando, Dmitri Golberg
  • Patent number: 10017386
    Abstract: A spherical boron nitride fine particle suited for use as a highly thermoconductive filler or the like has an average particle diameter of 0.01 to 1.0 ?m, an orientation index of 1 to 15, a boron nitride purity of 98.0% by mass or greater, and an average circularity of 0.80 or greater. A method of producing a spherical boron nitride fine particle includes reacting ammonia with an alkoxide borate at an ammonia/alkoxide borate molar ratio of 1 to 10 in an inert gas stream at 750° C. or higher within 30 seconds, then applying heat treatment to a reaction product in an atmosphere of ammonia gas or a mixed gas of ammonia gas and an inert gas at 1,000 to 1,600° C. for at least 1 hour, and further firing the reaction product in an inert gas atmosphere at 1,800 to 2,200° C. for at least 0.5 hour.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: July 10, 2018
    Assignees: DENKA COMPANY LIMITED, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Fumihiro Kurokawa, Seitaro Kobayashi, Takashi Kawasaki, Go Takeda, Yoshio Bando, Dmitri Golberg
  • Patent number: 10014126
    Abstract: As an object to provide a lithium-ion supercapacitor having a high energy density and a high power density, capable of being charged and discharged many times, and having a long product life, there is provided a lithium-ion supercapacitor using a graphene/CNT composite electrode, the lithium-ion supercapacitor including: an anode; a cathode that is arranged to be separated from the anode; and a lithium ion electrolytic solution that fills in a space between the anode and the cathode, wherein either or both of the cathode and the anode are formed by a graphene/CNT composite, and a CNT concentration in the graphene/CNT composite is 17 wt % or more and 33 wt % or less.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: July 3, 2018
    Assignee: National Institute for Materials Science
    Inventors: Jie Tang, Faxiang Qin, Luchang Qin
  • Publication number: 20180171222
    Abstract: Provided are a fluorescent material including a high light emission intensity and a light emitting device using the same. The present fluorescent material includes at least an A element, a M element, a D element, a E element, and an X element, wherein the A element is at least one element selected from the group consisting of Sr, Mg, Ca, and Ba; the M element is at least one element selected from the group consisting of Eu, Mn, Ce, Pr, Nd, Sm, Tb, Dy, and Yb; the D element is at least one element selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf, the E element is at least one element selected from the group consisting of Al, B, Ga, In, Sc, Y, and La; the X element is at least one element selected from the group consisting of O, N, and F; and a molar ratio of the M element to the sum of the A element and the M element [M/(A+M)] is 0.06 or less.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 21, 2018
    Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, NICHIA CORPORATION
    Inventors: Naoto HIROSAKI, Takashi TAKEDA, Shiro FUNAHASHI, Takayuki SHINOHARA, Shoji HOSOKAWA
  • Publication number: 20180175281
    Abstract: A piezoelectric material for a combustion pressure sensor, a method for producing the piezoelectric material, and a combustion pressure sensor using the piezoelectric material are provided. The piezoelectric material of the present invention includes a single crystal containing Ca, Ta, an element M (M is Al or Ga), Si, and O, the single crystal has the same crystal structure as the crystal structure of langasite represented by La3Ga5SiO14, and at least the content of the element M is insufficient for the stoichiometric composition represented by Ca3TaM3Si2O14. Preferably, in a case where the element M is Ga, each content of the Ca and the Si is excessive for the stoichiometric composition, and in a case where the element M is Al, the content of the Ca is excessive for the stoichiometric composition, and the content of the Ta is insufficient for the stoichiometric composition.
    Type: Application
    Filed: June 1, 2016
    Publication date: June 21, 2018
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA, Isao SAKAGUCHI, Naoki OHASHI
  • Publication number: 20180170811
    Abstract: The present invention relates to an oxidation-induced highly-functional self-healing ceramic composition, a method for producing the ceramic composition, a use of the ceramic composition and a method for achieving the enhancement of the functionality of the ceramic composition, by focusing on a repairing stage and a remodeling state in a self-healing process and by carrying out elemental and structural designing of an oxidation-induced self-healing ceramic composition for the purpose of speeding up these stages.
    Type: Application
    Filed: June 13, 2016
    Publication date: June 21, 2018
    Applicants: National Institute for Materials Science, National University Corporation YOKOHAMA National University
    Inventors: Toshio OSADA, Kiichi KAMODA, Toru HARA, Masanori MITOME, Taichi ABE, Takahito OHMURA, Wataru NAKAO
  • Publication number: 20180171223
    Abstract: Provided are a fluorescent material having a high light emission intensity, a method for producing the same, and a light emitting device using the same. The present fluorescent material includes a composition represented by formula (I): SiuEuvAlwOxNy, wherein when the sum of a parameter u and a parameter w is taken as 13, parameters u, v, w, x, and y in the formula (I) satisfy the following formulae (1) to (5). 2.77?u?2.88??(1) 0.04?v?0.08??(2) 10.12?w?10.23??(3) 0.42?x?0.95??(4) 12.89?y?13.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 21, 2018
    Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, NICHIA CORPORATION
    Inventors: Naoto HIROSAKI, Takayuki SHINOHARA, Shoji HOSOKAWA
  • Publication number: 20180155183
    Abstract: Low friction coating of the present invention includes a boron-doped zinc oxide thin film, wherein piezoelectric polarization in a vertical direction perpendicular to a film surface and a lateral direction horizontal to the film surface occurs and a magnitude of the piezoelectric polarization in the vertical direction is within 150 pm and a magnitude of the piezoelectric polarization in the lateral direction is within 100 pm at 90% or more of measurement points. This makes it possible to greatly decrease the friction in a nanometer order.
    Type: Application
    Filed: May 25, 2016
    Publication date: June 7, 2018
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Michiko SASAKI, Masahiro GOTO, Akira KASAHARA, Masahiro TOSA
  • Patent number: 9987228
    Abstract: A method for producing porous particles includes (1) a step of preparing a solution of an amphiphilic substance by dissolving the amphiphilic substance in a mixed solvent capable of being freeze-dried, (2) a step of producing a precipitate containing the amphiphilic substance by cooling the solution obtained in step (1) to a temperature equal to or less than a phase separation temperature of the solution, and thereafter holding the solution at the temperature, and (3) a step of producing porous particles by freeze-drying the solution containing the precipitate obtained in the step (2).
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: June 5, 2018
    Assignee: National Institute for Materials Science
    Inventors: Shaoling Zhang, Kohsaku Kawakami, Katsuhiko Ariga
  • Patent number: 9970749
    Abstract: Provided are: a sheet of colloidal crystals immobilized in resin exhibiting intense structural color, enabled to be observed easily from a squarely facing direction against a surface; and use thereof. The sheet of the present invention, assuming a direction perpendicular to part of a surface of a target area including partially the sheet surface is set as a specified axis, satisfies: (1) The target area includes plural inclined back-reflecting crystal-domains crystal domains having colloid particles immobilized in resin and including crystal lattice planes capable of Bragg-back reflecting at least some of components in a visible wavelength range of incident light having greater than 0 incident angle with the specified axis; and (2) By defining an azimuth angle around the specified axis, the inclined back-reflecting crystal-domains are so oriented that intensity of reflected light caused by Bragg back reflection varies depending on the azimuth angle of the incident light.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: May 15, 2018
    Assignees: FUJI KAGAKU CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Satoshi Kawanaka, Fumio Uchida, Tsutomu Sawada, Seiichi Furumi, Hiroshi Fudoji
  • Patent number: 9970690
    Abstract: A magnetic refrigerator, and a device including the same, include a hot-end heat exchanger, a cold-end heat exchanger, a magnetic material arranged so as to provide a temperature gradient between the hot-end heat exchanger and the cold-end heat exchanger, and a heat exchange medium, and satisfying the following Equation 1. k=Th/Tc=?Sc/?Sh>1??EQUATION 1 In Equation 1, Th is a temperature of a hot-end heat exchanger, Tc is a temperature of a cold-end heat exchanger, ?Sh is an entropy change of a magnetic material at Th, and ?Sc is an entropy change of a magnetic material at Tc.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: May 15, 2018
    Assignees: Samsung Electronics Co., Ltd., National Institute for Materials Science
    Inventors: Soon-Jae Kwon, Numazawa Takenori
  • Patent number: 9970850
    Abstract: A sheet of colloidal crystals immobilized in resin exhibiting intense structural color and allowing easy observation thereof from squarely facing direction against the surface; and application thereof are provided. The sheet includes crystal domains comprising colloidal crystals immobilized in resin. The Bragg reflection intensity resulting from crystal domains according to back reflection spectrum measurement to the sheet surface satisfies the following conditions (1) and (2). (1) When elevation angle from the sheet surface is in a range of at least 60° and less than 90° and measurement is performed at a predetermined azimuth angle on the sheet surface, intensity is not 0 and (2) when elevation angle from the sheet surface is in the range of at least 60° and less than 90° and azimuth dependency on the sheet surface is measured, the intensity exhibits a maximum value at the predetermined azimuth angle.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: May 15, 2018
    Assignees: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, FUJI KAGAKU CORPORATION
    Inventors: Satoshi Kawanaka, Fumio Uchida, Tsutomu Sawada, Seiichi Furumi, Hiroshi Fudoji
  • Publication number: 20180127647
    Abstract: Provided are a light-emitting instrument, and an image display device utilizing an AlON phosphor and having wide color gamut. The light-emitting instrument includes an emission source emitting light having a wavelength from 410 nm to 470 nm and a phosphor or a light-transmitting body where the phosphor is dispersed, and the phosphor includes an inorganic compound where an AlON crystal, an AlON solid solution crystal, or an inorganic crystal having a crystal structure identical to AlON includes at least Mn, an A element(a monovalent metal element) it necessary, a D element (a divalent metal element) if necessary, an E element (a monovalent anion) if necessary, and a G element (one or more elements other than Mn, the A, Al, O, N, the D, or the E) if necessary, and emits fluorescence having a peak wavelength from 515 nm to 541 nm upon irradiation of an excitation source.
    Type: Application
    Filed: May 13, 2016
    Publication date: May 10, 2018
    Applicant: National Institute for Materials Science
    Inventor: Naoto Hirosaki
  • Publication number: 20180127648
    Abstract: Provided are a phosphor, a manufacture thereof, and an illuminating device and an image display device using same which has excellent blue excitation characteristics of at least 440 nm and not exceeding 449 nm. The phosphor of the present invention includes an inorganic compound in which an AlON crystal, an AlON solid solution crystal, or an inorganic crystal having a same crystal structure as AlON, includes at least Mn and an A element (where the A element is a monovalent metal element) and, if necessary, a D element (where the D element is an element other than Mn, the A element, Al, O, and N) wherein, upon irradiation of an excitation source, the phosphor emits fluorescence having a peak wavelength in a range of at least 490 nm and not exceeding 550 nm.
    Type: Application
    Filed: May 13, 2016
    Publication date: May 10, 2018
    Applicant: National Institute for Materials Science
    Inventor: Naoto Hirosaki
  • Patent number: 9957371
    Abstract: Provided is a polymer nanowire which contains nanoparticles so as to have new functionalities. A thin film is formed on a substrate and includes functional nanoparticles and polymers, and further includes a photosensitive pigment as required. The thin film is irradiated with a pulsed laser. This causes a polymer nanowire containing the functional nanoparticles to grow from a surface of the thin film.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: May 1, 2018
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Michiko Sasaki, Masahiro Goto, Akira Kasahara, Toyohiro Chikyo, Masahiro Tosa
  • Patent number: 9945019
    Abstract: Disclosed herein is a nickel-based heat-resistant superalloy produced by a casting and forging method, the nickel-based heat-resistant superalloy comprising 2.0 mass % or more but 25 mass % or less of chromium, 0.2 mass % or more but 7.0 mass % or less of aluminum, 19.5 mass % or more but 55.0 mass % or less of cobalt, [0.17×(mass % of cobalt content?23)+3] mass % or more but [0.17×(mass % of cobalt content?20)+7] mass % or less and 5.1 mass % or more of titanium, and the balance being nickel and inevitable impurities, and being subjected to solution heat treatment at 93% or more but less than 100% of a ?? solvus temperature.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: April 17, 2018
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Yuefeng Gu, Toshio Osada, Yong Yuan, Tadaharu Yokokawa, Hiroshi Harada
  • Publication number: 20180090671
    Abstract: According to one embodiment, a magnetoresistive element includes a first magnetic layer, a second magnetic layer, and a first nonmagnetic layer. The first nonmagnetic layer is provided between the first magnetic layer and the second magnetic layer. The first nonmagnetic layer includes an oxide including an inverse-spinel structure.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 29, 2018
    Applicants: Kabushiki Kaisha Toshiba, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Yushi KATO, Tadaomi DAIBOU, Yuuzo KAMIGUCHI, Naoharu SHIMOMURA, Junichi ITO, Hiroaki SUKEGAWA, Mohamed BELMOUBARIK, Po-Han CHENG, Seiji MITANI, Tadakatsu OHKUBO, Kazuhiro HONO
  • Patent number: 9909060
    Abstract: Provided are an oxynitride phosphor comprising a JEM crystal as a main component and being characterized by light-emitting properties (light emission color or excitation property, light emission spectrum) that is different from the known JEM phosphor, and an application thereof. The phosphor of the present invention comprises the JEM crystal activated with Eu and represented by MAl(Si, Al)6(O, N)10 (where the M element is one or more elements selected from the group consisting of Ca, Sr, Eu, La, Sc, Y, and lanthanoid elements; and includes at least Eu as well as Ca and/or Sr).
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: March 6, 2018
    Assignee: National Institute for Materials Science
    Inventors: Naoto Hirosaki, Takashi Takeda, Shiro Funahashi, Eiichirou Narimatsu