Title:
FERRITE PARTICLE POWDER FOR ELECTROMAGNETIC WAVE ABSORPTION, METHOD FOR MANUFACTURING SAME, RESIN COMPOSITION USING SAME, AND ELECTROMAGNETIC WAVE ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2024/084976
Kind Code:
A1
Abstract:
Provided is a ferrite particle powder for electromagnetic wave absorption, the ferrite particle powder, even if a sheet is highly filled with said powder, making it possible to maintain the flexibility of the sheet and the uniformity of the physical properties of the sheet, and having excellent GHz-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, and z is 0.35 to 0.65, the ferrite particle powder having a compression density of 3.00 g/cm3 or greater, and a D10 of 0.8 µm or less and a D90 of 8.6 µm or less, as determined by laser diffraction.
Inventors:
KAMIKAWA SHUHEI (JP)
NISHIO YASUSHI (JP)
NISHIO YASUSHI (JP)
Application Number:
PCT/JP2023/036306
Publication Date:
April 25, 2024
Filing Date:
October 05, 2023
Export Citation:
Assignee:
TODA KOGYO CORP (JP)
International Classes:
H01F1/11; C04B35/26; H01F1/117; H01F1/34; H05K9/00
Domestic Patent References:
| WO2020044706A1 | 2020-03-05 |
Foreign References:
| JP2022024885A | 2022-02-09 | |||
| JP2008169378A | 2008-07-24 | |||
| JP2022122287A | 2022-08-22 | |||
| JP2009099969A | 2009-05-07 | |||
| JP2010260766A | 2010-11-18 |
Attorney, Agent or Firm:
OKUMACHI Tetsuyuki (JP)
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