METHOD FOR MANUFACTURING POWDER MAGNETIC CORE, POWDER MAGNETIC CORE, AND INDUCTOR

Title:

METHOD FOR MANUFACTURING POWDER MAGNETIC CORE, POWDER MAGNETIC CORE, AND INDUCTOR

Document Type and Number:

WIPO Patent Application WO/2019/065500

Kind Code:

A1

Abstract:

This method for manufacturing a powder magnetic core is provided with: a step for heat-treating amorphous soft magnetic alloy powder to obtain nanocrystal powder; a step for obtaining granulated powder from nanocrystal powder, malleable powder, and a binder; a step for pressure-molding the granulated powder to obtain a green compact; a step for curing the binder by heat-treating the green compact at a temperature which is equal to or higher than the curing initiation temperature of the binder and lower than the crystallization initiation temperature of the amorphous soft magnetic alloy powder.

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Inventors:

CHIBA MIHO (JP)
URATA AKIRI (JP)

Application Number:

PCT/JP2018/035066

Publication Date:

April 04, 2019

Filing Date:

September 21, 2018

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Assignee:

TOKIN CORP (JP)

International Classes:

H01F41/02; B22F1/054; B22F1/10; B22F3/00; C22C38/00; H01F1/153; H01F17/04

Domestic Patent References:

WO2017022227A1

2017-02-09

Foreign References:

JP2014103265A

2014-06-05

Attorney, Agent or Firm:

YAMAZAKI Takuya (JP)

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