Patents by Inventor Yoshiki KAJIURA

Yoshiki KAJIURA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240071660
    Abstract: A soft magnetic alloy powder comprises a component having a compositional formula ((Fe(1?(?+?))Co?Ni?)(1??)X1?)(1?(a+b+c+d+e))BaPbSicCdCre in atomic ratio. X1 comprises at least one selected from specific elements. Values of a, b, c, d, e, ?, ?, and ? of the compositional formula satisfy specific ranges. The soft magnetic alloy powder comprises soft magnetic alloy particles including soft magnetic alloy particles having a particle size of (0.95×D90) or more and (1.05×D90) or less. An average Wadell's circularity of the soft magnetic alloy particles having the particle size of (0.95×D90) or more and (1.05×D90) or less is 0.75 or more. A variance of Wadell's circularity of the soft magnetic alloy particles having the particle size of (0.95×D90) or more and (1.05×D90) or less is 0.035 or less.
    Type: Application
    Filed: August 30, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Akito HASEGAWA, Yoshiki KAJIURA, Masakazu HOSONO, Kazuhiro YOSHIDOME
  • Publication number: 20240071663
    Abstract: A soft magnetic alloy powder comprises first particles to fifth particles, each having a particle size within a specific range. Among the first particles to the fifth particles, nth particles have an average particle size xn (?m), an average circularity yn, and a variance zn of circularity, where nth is any ordinal number from first to fifth. Points (xn, yn) (n=1 to 5) plotted in an xy plane define an approximate straight line having a slope “my” of ?0.0030 or more. Points (xn, zn) (n=1 to 5) plotted in an xz plane define an approximate straight line having a slope “mz” of 0.00050 or less.
    Type: Application
    Filed: August 30, 2023
    Publication date: February 29, 2024
    Applicant: TDK CORPORATION
    Inventors: Masakazu HOSONO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Yoshiki KAJIURA
  • Patent number: 11894169
    Abstract: Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe(1?(?+?))X1?X2?)(1?(a+b+c+d+e+f))MaBbPcSidCeSf. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0?a?0.140; 0.020<b?0.200; 0<c?0.150; 0?d?0.060; 0?e?0.030; 0?f?0.010; ??0; ??0; and 0??+??0.50. An oxygen content ratio in the soft magnetic powder is from 300 ppm to 3,000 ppm as a mass ratio.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: February 6, 2024
    Assignee: TDK CORPORATION
    Inventors: Kazuhiro Yoshidome, Hiroyuki Matsumoto, Kenji Horino, Satoko Mori, Masakazu Hosono, Yoshiki Kajiura
  • Publication number: 20230170115
    Abstract: A soft magnetic powder includes soft magnetic metal particles. The soft magnetic metal particles include metal particles and oxide parts covering the metal particles. Each of the metal particles at least include Fe. Each of the oxide parts at least include Fe and Mn. Concentration distributions of Mn of the soft magnetic particles have maximum concentrations of Mn in the oxide parts.
    Type: Application
    Filed: November 22, 2022
    Publication date: June 1, 2023
    Applicant: TDK CORPORATION
    Inventors: Yoshiki KAJIURA, Hiroyuki MATSUMOTO, Kazuhiro YOSHIDOME, Satoko MORI
  • Publication number: 20230095146
    Abstract: A metal powder producing apparatus includes a molten metal supply unit, a cylinder body, and a cooling liquid introduction unit. The molten metal supply unit discharges a molten metal. The cylinder body is capable of being formed with a layer of a cooling liquid for cooling the molten metal on an inner circumference surface of the cylinder body. The cooling liquid introduction unit supplies the cooling liquid to an upper inside of the cylinder body. The inner circumference surface of the upper inside of the cylinder body has a substantially elliptical shape.
    Type: Application
    Filed: September 14, 2022
    Publication date: March 30, 2023
    Applicant: TDK CORPORATION
    Inventors: Masakazu HOSONO, Kazuhiro YOSHIDOME, Yoshiki KAJIURA, Hiroyuki MATSUMOTO
  • Publication number: 20210230720
    Abstract: A soft magnetic alloy powder has a specific composition in which a Co content is large. A soft magnetic alloy powder has a glass transition point Tg and a melting point Tm, 900° C.?Tm?1200° C. is satisfied, or when coercivity when applying a pressure XP to a soft magnetic alloy powder is set as YH, and a straight line obtained by linearly approximating a relationship between XP and YH by a method of least squares is set as YH=kXP+1, k (unit: Oe/MPa) satisfies 0?k?0.00100.
    Type: Application
    Filed: December 11, 2020
    Publication date: July 29, 2021
    Applicant: TDK CORPORATION
    Inventors: Yoshiki KAJIURA, Akito HASEGAWA, Kazuhiro YOSHIDOME, Hiroyuki MATSUMOTO, Hironobu KUMAOKA
  • Publication number: 20200135369
    Abstract: A soft magnetic alloy powder includes a main component of (Fe(1?(?+?))X1?X2?)(1?(a+b+c+d+e+f))MaBbPcSidCeSf, in which X1 is one or more of Co and Ni, X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements, and M is one or more of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. 0?a?0.160, 0.020?b?0.200, 0?c?0.150, 0?d?0.060, 0?e?0.030, 0.0010?f?0.030, 0.005?f/b?1.50, ??0, ??0, and 0??+??0.50 are satisfied.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 30, 2020
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIDOME, Hiroyuki MATSUMOTO, Kenji HORINO, Masakazu HOSONO, Yoshiki KAJIURA
  • Publication number: 20190355498
    Abstract: Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe(1-(?+?))X1?X2?)(1-(a+b+c+d+e+f))MaBbPcSidCeSf. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0?a?0.140; 0.020<b?0.200; 0<c?0.150; 0?d?0.060; 0?e?0.030; 0?f?0.010; ??0; ??0; and 0??+??0.50. An oxygen content ratio in the soft magnetic powder is from 300 ppm to 3,000 ppm as a mass ratio.
    Type: Application
    Filed: May 16, 2019
    Publication date: November 21, 2019
    Applicant: TDK CORPORATION
    Inventors: Kazuhiro YOSHIDOME, Hiroyuki MATSUMOTO, Kenji HORINO, Satoko MORI, Masakazu HOSONO, Yoshiki KAJIURA