Insulator-coated soft magnetic powder, powder magnetic core, magnetic element, electronic device, and vehicle
US-2019103207-A1 · Apr 4, 2019 · US
Soft magnetic metal powder, dust core, and magnetic component
US11798719B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11798719-B2 |
| Application number | US-201916296348-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 8, 2019 |
| Priority date | Mar 9, 2018 |
| Publication date | Oct 24, 2023 |
| Grant date | Oct 24, 2023 |
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- Title
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Abstract
Official abstract text for this publication.
A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the second coating part includes oxides of Fe as a main component, and the third coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.
First claim
Opening claim text (preview).
What is claimed is: 1. A soft magnetic metal powder having coated particles, each comprising a soft magnetic metal particle including Fe, and a coating part, wherein the soft magnetic metal particle is spherical, the coating part is formed on a surface of the soft magnetic metal particle, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes an oxide of Si as a main component, the second coating part includes an oxide of Fe as a main component, the third coating part includes an oxide of at least one element selected from the group consisting of P, Si, Bi, and Zn, a soft magnetic metal fine particle exists inside the third coating part, and a thickness of the third coating part is 5 nm or more and 200 nm or less. 2. The soft magnetic metal powder according to claim 1 , wherein a ratio of trivalent Fe atoms is 50% or more among Fe atoms of the oxide of Fe included in the second coating part. 3. The soft magnetic metal powder according to claim 1 , wherein an aspect ratio of the soft magnetic metal fine particle is 1:2 to 1:10000. 4. The soft magnetic metal powder according to claim 2 , wherein an aspect ratio of the soft magnetic metal fine particle is 1:2 to 1:10000. 5. The soft magnetic metal powder according to claim 1 , wherein the soft magnetic metal particle includes a crystalline region, and an average crystallite size is 1 nm or more and 50 nm or less. 6. The soft magnetic metal powder according to claim 1 , wherein the soft magnetic metal particle is amorphous. 7. A dust core constituted by the soft magnetic metal powder according to claim 1 . 8. A magnetic component comprising the dust core according to claim 7 . 9. The soft magnetic metal powder according to claim 1 , wherein the soft magnetic metal fine particle has a short diameter direction and a long diameter direction, the short diameter direction is approximately parallel to a radial direction of the coated particle, and the long diameter direction is approximately parallel to a circumference direction of the coated particle. 10. The soft magnetic metal powder according to claim 1 , wherein the oxide of the third coating part is an oxide glass.
Assignees
Inventors
Classifications
- H01F1/24Primary
the particles being insulated · CPC title
Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) · CPC title
by macromolecular organic substances · CPC title
mixtures of metallic and non-metallic particles; metallic particles having oxide skin · CPC title
amorphous, e.g. amorphous oxides · CPC title
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Frequently asked questions
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- What does patent US11798719B2 cover?
- A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the s…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/24. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 24 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).