Title:
SOFT MAGNETIC FLAKY METAL POWDER, AND RESIN COMPOSITE SHEET AND RESIN COMPOSITE COMPOSITION USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/135933
Kind Code:
A1
Abstract:
Provided are a nanocrystal soft magnetic flaky metal powder, and a resin composite sheet and a resin composite composition for mold processing in which the material is used and that have high permeability and low core loss, the nanocrystal soft magnetic flaky metal powder having a small change in the temperature coefficient of permeability in a range of -40℃ to 150℃ of a resin composite sheet or a resin composite composition molding in which the nanocrystal soft magnetic flaky metal powder is used, and having high permeability and low core loss. A nanocrystal soft magnetic flaky metal powder is characterized in that the temperature coefficient Kn (n is 1, 2, 3) of the permeability of a resin composite sheet or an article obtained by molding a resin composite composition in which the nanocrystal soft magnetic flaky metal powder is used is expressed by expressions (1), (2), and (3) in the range of -40℃ to 150℃, and is in the ranges of 0≤K1≤0.20, -0.10≤K2≤0.10, and -0.15≤K3≤0.05, the nanocrystal soft magnetic flaky metal powder making it possible to obtain a higher soft magnetic characteristic than is possible with conventional technology. (1): K1=(μ(0℃)-μ(-40℃))/μ(-40℃)
(2): K2=(μ(85℃)-μ(-40℃))/μ(-40℃)
(3): K3=(μ(150℃)-μ(-40℃))/μ(-40℃)
wherein μ: permeability (μ': real permeability, μ": imaginary permeability), and μ(0℃): permeability at 0℃
Further, a resin composite sheet and a resin composite composition are characterized by comprising the nanocrystal soft magnetic flaky metal powder and a resin, wherein the core loss of the resin composite sheet is less than 300 kW/m3, and the core loss of a mold-processed article of the resin composite composition is less than 600 kW/m3.
Inventors:
YASUI HIROSHI (JP)
HIKASA NOBUHIKO (JP)
NISHIYAMA SHINICHI (JP)
YUKUYOSHI NAOYA (JP)
TSURUSAKI KENTA (JP)
HIKASA NOBUHIKO (JP)
NISHIYAMA SHINICHI (JP)
YUKUYOSHI NAOYA (JP)
TSURUSAKI KENTA (JP)
Application Number:
PCT/JP2022/042779
Publication Date:
July 20, 2023
Filing Date:
November 11, 2022
Export Citation:
Assignee:
MATE CO LTD (JP)
International Classes:
H01F1/153; B22F1/00; B22F1/06; B22F1/07; B22F3/00; C22C38/00; H01F1/20; H05K9/00
Foreign References:
| JP2016094652A | 2016-05-26 | |||
| JPH11269509A | 1999-10-05 | |||
| JP2009059753A | 2009-03-19 | |||
| JP2021111766A | 2021-08-02 | |||
| JP2003209010A | 2003-07-25 |
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