Soft magnetic powder, magnetic core, method for manufacturing soft magnetic powder, and method for manufacturing magnetic core
US-2018315528-A1 · Nov 1, 2018 · US
Dust core
US11915847B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11915847-B2 |
| Application number | US-201815915852-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 8, 2018 |
| Priority date | Mar 9, 2017 |
| Publication date | Feb 27, 2024 |
| Grant date | Feb 27, 2024 |
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- Title
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- Abstract
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- First independent claim
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Abstract
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A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.
First claim
Opening claim text (preview).
The invention claimed is: 1. A dust core comprising a metal magnetic material and a resin, wherein fine particles exist on a surface of the dust core, a film exists in contact with a surface of the metal magnetic material, the resin includes epoxy resin and/or imide resin, the film consists of a Si—O based oxide, and the metal magnetic material is present in an amount of 90 wt % to 98 wt %, and the resin is present in an amount of 2 wt % to 10 wt %, by weight of the dust core. 2. The dust core according to claim 1 , wherein the fine particles comprise a Si—O based compound. 3. The dust core according to claim 1 , wherein the fine particles are attached to the metal magnetic material. 4. The dust core according to claim 1 , wherein the metal magnetic material comprises a main component of Fe. 5. The dust core according to claim 1 , wherein the metal magnetic material comprises a main component of Fe and Si. 6. The dust core according to claim 1 , wherein the fine particles are attached to the metal magnetic material, and the fine particles so attached are present in a matrix of the resin. 7. The dust core according to claim 1 , wherein the fine particles on the surface of the dust core have an average particle size of 1.0 to 200 nm. 8. The dust core according to claim 7 , wherein particle sizes of the fine particles on the surface of the dust core have a standard deviation a of 30 nm or less.
Assignees
Inventors
Classifications
- H01F1/26Primary
by macromolecular organic substances · CPC title
Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title
Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) · CPC title
the particles being insulated · CPC title
mixtures of metallic and non-metallic particles; metallic particles having oxide skin · CPC title
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Frequently asked questions
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- What does patent US11915847B2 cover?
- A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/26. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 27 2024 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).