Title:
FERRITE PARTICLE POWDER FOR ELECTROMAGNETIC WAVE ABSORPTION, METHOD FOR MANUFACTURING SAME, AND RESIN COMPOSITION USING SAID FERRITE PARTICLE POWDER FOR ELECTROMAGNETIC WAVE ABSORPTION
Document Type and Number:
WIPO Patent Application WO/2023/153399
Kind Code:
A1
Abstract:
The present invention provides a ferrite particle powder for electromagnetic wave absorption that can preserve the flexibility of a sheet as well as the uniformity of the physical properties of the sheet even when the sheet is filled with a large amount thereof, said ferrite particle powder also having excellent gigahertz-band electromagnetic wave absorption performance. The ferrite particle powder for electromagnetic wave absorption comprises a magnetoplumbite-type ferrite represented by the chemical formula AxFe(12–y)(TizMn(1–z))yO19, where A is at least one element selected from Ba, Sr, Ca and Pb, x is 0.9 to 1.1, y is 5.0 or less, z is 0.35 to 0.65. Said ferrite particle powder has a pressed density of at least 3.00 g/cm3, as well as an average particle size of 0.50 to 3.0 µm, as determined using the air permeability method (Blaine's method).
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Inventors:
TSUKAMOTO HIDEMI (JP)
WATANABE KOZO (JP)
MITSUI HIDEHARU (JP)
NISHIO YASUSHI (JP)
WATANABE KOZO (JP)
MITSUI HIDEHARU (JP)
NISHIO YASUSHI (JP)
Application Number:
PCT/JP2023/003990
Publication Date:
August 17, 2023
Filing Date:
February 07, 2023
Export Citation:
Assignee:
TODA KOGYO CORP (JP)
International Classes:
H05K9/00; C01G49/00; C04B35/26; C08K3/22; H01F1/113
Foreign References:
| JP2022024885A | 2022-02-09 | |||
| JPH11354972A | 1999-12-24 | |||
| JP2008169378A | 2008-07-24 | |||
| JP2002353020A | 2002-12-06 |
Attorney, Agent or Firm:
OKUMACHI Tetsuyuki (JP)
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