- Patent Title: Insulator-coated soft magnetic powder, method for producing insulator-coated soft magnetic powder, powder magnetic core, magnetic element, electronic device, and vehicle
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Application No.: US16286856Application Date: 2019-02-27
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Publication No.: US11456098B2Publication Date: 2022-09-27
- Inventor: Atsushi Nakamura
- Applicant: Seiko Epson Corporation
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2018-035894 20180228
- Main IPC: H01F7/02
- IPC: H01F7/02 ; H01F3/08 ; H01F1/24 ; H01F1/33 ; H01F1/147 ; B22F1/16 ; B22F9/08

Abstract:
An insulator-coated soft magnetic powder includes core particles each of which includes a base portion containing a soft magnetic material and an oxide film provided on the surface of the base portion and containing an oxide of an element contained in the soft magnetic material, ceramic particles which are provided on the surface of each of the core particles and have an insulating property, and a glass material which is provided on the surface of each of the core particles, has an insulating property, and contains at least one type of phosphorus oxide, bismuth oxide, zinc oxide, boron oxide, tellurium oxide, and silicon oxide as a main component, wherein the ceramic particles are included in a proportion of 100 vol % or more and 500 vol % or less of the glass material.
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