公开(公告)号：US20250118467A1

公开(公告)日：2025-04-10

申请号：US18836217

申请日：2022-12-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masaaki TAHARA ,  Toru IWABUCHI ,  Hitoshi HORIUCHI

IPC: H01F1/08 ,  H01F3/08 ,  H01F41/02

Abstract: A dust core includes a metal magnetic powder and a binding agent that binds particles of the metal magnetic powder. The binding agent includes a silicone resin and an epoxy resin. In an elemental analysis of the dust core based on an image of a cross section of the dust core, when a silicon (Si) element and a carbon (C) element are detected on a weight basis at 15 measurement points between the particles of the metal magnetic powder in the image, a difference between a maximum value and a minimum value of x/(x+y) values at the 15 measurement points is at most 0.243, where x denotes an amount of the Si element detected and y denotes an amount of the C element detected.