US 11,952,286 B2
Mn ferrite powder, resin composition, electromagnetic wave shielding material, electronic material, and electronic component
Koji Aga, Chiba (JP); Takashi Kojima, Chiba (JP); Kazutaka Ishii, Chiba (JP); Tetsuya Igarashi, Chiba (JP); and Sho Kuwahara, Chiba (JP)
Assigned to POWDERTECH CO., LTD., (JP)
Appl. No. 16/967,197
Filed by POWDERTECH CO., LTD., Kashiwa (JP)
PCT Filed Feb. 6, 2019, PCT No. PCT/JP2019/004301
§ 371(c)(1), (2) Date Aug. 4, 2020,
PCT Pub. No. WO2019/159797, PCT Pub. Date Aug. 22, 2019.
Claims priority of application No. 2018-023565 (JP), filed on Feb. 13, 2018.
Prior Publication US 2021/0047200 A1, Feb. 18, 2021
Int. Cl. C01G 49/00 (2006.01); C08K 3/22 (2006.01); C08L 29/04 (2006.01); H01F 1/34 (2006.01); H01F 1/37 (2006.01); H05K 9/00 (2006.01)
CPC C01G 49/0072 (2013.01) [C08L 29/04 (2013.01); H01F 1/344 (2013.01); H01F 1/37 (2013.01); H05K 9/0081 (2013.01); C01P 2004/32 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C08K 3/22 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01); C08K 2201/01 (2013.01)] 8 Claims
 
1. A Mn ferrite powder,
comprising a plurality of ferrite particles,
having a volume average particle diameter of 2.84 μm or more and 10 μm or less, and
having a volume-based cumulative distribution at 2.106 μm (under a sieve) of 0.1 vol % or more and 50.0 vol % or less.