SINTERED R-TM-B MAGNET

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United States of America Patent

SERIAL NO

15549777

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Abstract

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A sintered R-TM-B magnet comprising 24.5-34.5% by mass of R, which is at least one selected from rare earth elements including Y, 0.85-1.15% by mass of B, less than 0.1% by mass of Co, 0.07-0.5% by mass of Ga, and 0-0.4% by mass of Cu, the balance being Fe and inevitable impurities; the amounts (% by mass) of Ga and Cu being in a region of a pentagon defined by a point A (0.5, 0.0), a point B (0.5, 0.4), a point C (0.07, 0.4), a point D (0.07, 0.1) and a point E (0.2, 0.0), on an X-Y plane in which the X-axis represents the amount of Ga, and the Y-axis represents the amount of Cu.

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Patent Owner(s)

Patent OwnerAddress
HITACHI METALS LTDKONAN 1-CHOME MINATO-KU TOKYO

International Classification(s)

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  • 2016 Application Filing Year
  • H01F Class
  • 2147 Applications Filed
  • 1680 Patents Issued To-Date
  • 78.25 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2016201720182019202020212022202320240255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
ISHII, Rintaro Mishima-gun, JP 24 107
KAMACHI, Masanao Kumagaya-shi, JP 10 23
KATOU, Takahiro Kumagaya-shi, JP 5 14
YAMAMICHI, Daisuke Kumagaya-shi, JP 2 0

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  • H01F Class
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Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1904092655101 - 1011 - 2021 - 3031 - 4041 - 500255075100125150175200225250275300325350375400425450

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