	US 12,134,567 B2
	Ferrite powder and method for producing same
Takashi Kojima, Kashiwa (JP); and Koji Aga, Kashiwa (JP)
Assigned to POWDERTECH CO., LTD., Kashiwa (JP)
Appl. No. 17/794,394
Filed by POWDERTECH CO., LTD., Kashiwa (JP)
PCT Filed Jan. 22, 2021, PCT No. PCT/JP2021/002220 § 371(c)(1), (2) Date Jul. 21, 2022, PCT Pub. No. WO2021/149794, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 2020-009578 (JP), filed on Jan. 24, 2020.
Prior Publication US 2023/0055795 A1, Feb. 23, 2023
Int. Cl. C01G 49/00 (2006.01); H01F 1/34 (2006.01); H01F 1/37 (2006.01)

CPC C01G 49/0072 (2013.01) [H01F 1/344 (2013.01); H01F 1/37 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2006/42 (2013.01)]

8 Claims

1. A ferrite powder comprising highly spherical ferrite particles,

wherein the ferrite powder contains 54.0 to 70.0 mass % iron (Fe) and 3.5 to 10 mass % manganese (Mn),

wherein the ferrite powder has a volume average particle size of 2.5 to 20.0 μm and a carbon content of from 0.010 mass % to 0.100 mass %, and

wherein the ferrite powder has a mean shape factor SF-1 of 100 to 110.