Soft magnetic material, core, and inductor

Patent metadata

Field	Value
Publication number	US-2018197666-A1
Application number	US-201815868439-A
Country	US
Kind code	A1
Filing date	Jan 11, 2018
Priority date	Jan 12, 2017
Publication date	Jul 12, 2018
Grant date	—

Abstract

A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein the soft magnetic metal powder is constituted from a particle group α and group β, when IA is a peak intensity of the particle group α, IB is a peak intensity of the particle group β, and IC is a minimum intensity present between the particle group α and group β, then an intensity ratio IC/IA satisfies 0.10 or less and an intensity ratio IA/IB satisfies 1.2 or more and 3.0 or less, the particle group α having a maximum peak intensity in a size distribution of the soft magnetic metal powder, the particle group β having an peak intensity which is the second largest to the particle group α, and a peak particle size PA of the particle group α is larger than a peak particle size PB of the particle group β.

First claim

1 . A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein said soft magnetic metal powder is comprised of a particle group α and a particle group β,
when IA is a peak intensity of the particle group α, IB is a peak intensity of the particle group β, and IC is a minimum intensity present between the particle group α and the particle group β, then an intensity ratio IC/IA satisfies 0.10 or less and an intensity ratio IA/IB satisfies 1.2 or more and 3.0 or less,
the particle group α is the particle group having a maximum peak intensity in a size distribution of said soft magnetic metal powder,
the particle group β is the particle group having an peak intensity which is the second largest to the particle group α, and
a peak particle size PA of the particle group α is larger than a peak particle size PB of the particle group β.

2 . The soft magnetic material as set forth in claim 1 , wherein the peak particle size PA of said particle group α is 60 μm or less.

3 . The soft magnetic material as set forth in claim 1 , wherein the soft magnetic metal powder constituting said particle group α is Fe or a metal comprising Fe, and the soft magnetic metal powder is coated with an insulation material.

4 . A core produced by the soft magnetic material as set forth in claim 1 .

5 . An inductor comprising the core as set forth in claim 4 .

Assignees

• Tdk Corp

Inventors

• Shinkai Yoshihiro
• Kamiya Takashi
• Koeda Masahito
• Abe Kyotaro

Classifications

• H01F3/08 Primary

  made from powder (powder coatings on sheets H01F3/02; on strips or ribbons H01F3/04; on wires H01F3/06) · CPC title

• H01F1/24 Primary

  the particles being insulated · CPC title

• H01F1/15308

  based on Fe/Ni (H01F1/15325 takes precedence) · CPC title

• H01F27/255

  made from particles (H01F27/26 takes precedence) · CPC title

• H01F1/26

  by macromolecular organic substances · CPC title