Title:
SOFT MAGNETIC POWDER AND MAGNETIC CORE
Document Type and Number:
WIPO Patent Application WO/2022/209497
Kind Code:
A1
Abstract:
[Problem] To provide a soft magnetic powder used to fabricate a magnetic core that has high relative permeability and high DC superimposition characteristics. [Solution] The present invention is a soft magnetic powder that includes Fe and Co. The total content of Fe and Co with respect to the soft magnetic powder overall is 90 mass% or greater. The Fe content with respect to the total content of Fe and Co is 30-95 mass%. The average particle diameter of the soft magnetic powder is 0.10-5.0 µm. The amount of oxygen on the surface of the soft magnetic powder is 0.010 g/m2 or less. The true density of the soft magnetic powder with respect to the theoretical density of the soft magnetic powder is 90-99%.
Inventors:
OKUDA NOBUHIRO (JP)
MATSUMOTO HIROYUKI (JP)
YOSHIDOME KAZUHIRO (JP)
MATSUMOTO HIROYUKI (JP)
YOSHIDOME KAZUHIRO (JP)
Application Number:
PCT/JP2022/008050
Publication Date:
October 06, 2022
Filing Date:
February 25, 2022
Export Citation:
Assignee:
TDK CORP (JP)
International Classes:
B22F9/00; B22F1/00; B22F1/14; B22F1/142; C22C19/07; C22C38/00; C22C45/02; H01F1/153; H01F27/255
Domestic Patent References:
| WO2019142610A1 | 2019-07-25 |
Foreign References:
| JPH04180546A | 1992-06-26 | |||
| JPH04502490A | 1992-05-07 | |||
| JPH11511208A | 1999-09-28 |
Attorney, Agent or Firm:
MAEDA & SUZUKI (JP)
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