Invention Grant
- Patent Title: Insulator-coated soft magnetic powder, powder magnetic core, magnetic element, electronic device, and vehicle
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Application No.: US16145304Application Date: 2018-09-28
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Publication No.: US11348712B2Publication Date: 2022-05-31
- Inventor: Toshikuni Sato , 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: JPJP2017-190946 20170929
- Main IPC: H01F1/33
- IPC: H01F1/33 ; H01F27/24 ; B22F1/02 ; B22F1/00 ; C03C8/04 ; C03C3/066 ; H01F3/08 ; H01F1/24 ; G11B5/66 ; B22F1/05 ; B22F1/16 ; H01F17/04 ; H01F17/06 ; H01F27/28

Abstract:
An insulator-coated soft magnetic powder includes a plurality of particles each including a core which contains a soft magnetic material, and an insulating layer which is provided on the surface of the core and contains a glass material including Bi2O3 as a main component. The content of an alkali metal in the insulating layer is 5 mol % or less. The glass material further contains at least one of ZnO and B2O3. The content of Bi2O3 in the glass material is 40 mol % or more and 80 mol % or less.
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