公开(公告)号：US20240182323A1

公开(公告)日：2024-06-06

申请号：US18553430

申请日：2022-03-08

Applicant: POWDERTECH CO., LTD.

Inventor： Tatsuto KANEKO ,  Koji AGA

IPC: C01G49/00 ,  C08K3/22

CPC classification number: C01G49/0072 ,  C08K3/22 ,  C01P2002/32 ,  C01P2002/60 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/40 ,  C08K2003/2262 ,  C08K2003/2275 ,  C08K2003/2296 ,  C08K2201/003

Abstract: Provided are a ferrite powder that inhibits magnetic loss at frequencies lower than 100 MHZ, and when applied to a composite material or a composite body, is capable of preventing particles from coming off without loss of moldability and filling properties, a ferrite resin composite material, and electromagnetic shielding material, electronic material, or electronic component. This ferrite powder is a Mn—Zn ferrite powder containing at least spherical or polyhedral ferrite particles having a spinel phase as a main phase. The ferrite particles also have, at respective surfaces thereof, a step structure having a convex polygonal contour. Furthermore, the BET specific surface area of the ferrite powder is 0.35-10.00 m2/g, and the contained amount of the zinc oxide (ZnO) phase thereof is 0-0.8 mass %.