Mn ferrite powder, resin composition, electromagnetic wave shielding material, electronic material, and electronic component
US-2021047200-A1 · Feb 18, 2021 · US
Ferrite powder, ferrite resin composite material, and electromagnetic shielding material, electronic material, or electronic component
US12595188B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12595188-B2 |
| Application number | US-202017641009-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2020 |
| Priority date | Oct 7, 2019 |
| Publication date | Apr 7, 2026 |
| Grant date | Apr 7, 2026 |
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- Title
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Abstract
Official abstract text for this publication.
Provided are: a ferrite powder whereby, when the ferrite powder is applied in a composite material, dropping out of ferrite particles is suppressed without moldability and filling ability being compromised; a ferrite resin composite material; and an electromagnetic shielding material, an electronic material, or an electronic component. This ferrite powder includes at least spherical or polyhedral ferrite particles in which a step structure is provided on surfaces thereof, the step structure having a polyhedral outline in the surfaces of the ferrite particles.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A ferrite powder comprising spherical or polyhedral ferrite particles having a stepped feature on the surfaces thereof, wherein the stepped feature has polygonal contours on the surfaces of ferrite particles, and a mean interval between adjacent step edges is in a range of 3 nm or more or 50 nm or less. 2 . The ferrite powder according to claim 1 , wherein the stepped feature has two or more steps. 3 . The ferrite powder according to claim 1 , wherein the ferrite powder has a shape factor SF-1 of 100 to 110. 4 . The ferrite powder according to any one of claim 1 , wherein the ferrite powder has a 50% diameter (D50) of 0.10 to 20.00 μm in a volume distribution of particle sizes thereof. 5 . The ferrite powder according to claim 1 , wherein the ferrite powder has a composition of manganese (Mn) ferrite containing manganese (Mn) in a content of 4.0 to 17.0% by mass and iron (Fe) in a content of 50.0 to 70.0% by mass. 6 . A ferrite resin composite material comprising the ferrite powder according to claim 1 and a resin. 7 . An electromagnetic shielding material, an electronic material, or an electronic component comprising the ferrite resin composite material according to claim 6 .
Assignees
Inventors
Classifications
Magnetic shielding materials · CPC title
Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title
Magnetic properties · CPC title
Surface area · CPC title
Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title
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- What does patent US12595188B2 cover?
- Provided are: a ferrite powder whereby, when the ferrite powder is applied in a composite material, dropping out of ferrite particles is suppressed without moldability and filling ability being compromised; a ferrite resin composite material; and an electromagnetic shielding material, an electronic material, or an electronic component. This ferrite powder includes at least spherical or polyhedr…
- Who is the assignee on this patent?
- Powdertech Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C01G49/0072. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 07 2026 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).