Coil device
US-9978504-B2 · May 22, 2018 · US
Magnetic core, method for producing magnetic core, and coil component
US2017207017A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017207017-A1 |
| Application number | US-201515326071-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 16, 2015 |
| Priority date | Jul 16, 2014 |
| Publication date | Jul 20, 2017 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
There is provided a magnetic core having high manufacturability and high magnetic permeability, to provide a method for manufacturing such a magnetic core, and to provide a coil component having such a magnetic core. The invention is directed to a magnetic core including: Fe-based soft magnetic alloy particles; and an oxide phase existing between the Fe-based soft magnetic alloy particles, wherein the Fe-based soft magnetic alloy particles include Fe—Al—Cr alloy particles and Fe—Si—Al alloy particles.
First claim
Opening claim text (preview).
1 . A magnetic core comprising: Fe-based soft magnetic alloy particles; and an oxide phase existing between the Fe-based soft magnetic alloy particles, wherein the Fe-based soft magnetic alloy particles comprise Fe—Al—Cr alloy particles and Fe—Si—Al alloy particles. 2 . The magnetic core according to claim 1 , wherein the oxide phase is richer in Al than the Fe-based soft magnetic alloy particles. 3 . The magnetic core according to claim 1 , which has a density of 5.4×10 3 kg/m 3 or more. 4 . The magnetic core according to claim 1 , wherein the Fe-based soft magnetic alloy particles have an average particle size of 20 μm or less. 5 . A method for manufacturing the magnetic core according to claim 1 , the method comprising the steps of: pressing a mixed powder comprising an Fe—Al—Cr alloy powder and an Fe—Si—Al alloy powder to form a compact; and heat-treating the compact to form the oxide phase. 6 . A coil component comprising: the magnetic core according to claim 1 ; and a coil provided on the magnetic core.
Assignees
Inventors
Classifications
- H01F27/255Primary
made from particles (H01F27/26 takes precedence) · CPC title
made from powder (powder coatings on sheets H01F3/02; on strips or ribbons H01F3/04; on wires H01F3/06) · CPC title
with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core · CPC title
Fe-Si-Al based alloys, e.g. Sendust · CPC title
Manufacturing of magnetic circuits by moulding or by pressing powder (magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36) · CPC title
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- What does patent US2017207017A1 cover?
- There is provided a magnetic core having high manufacturability and high magnetic permeability, to provide a method for manufacturing such a magnetic core, and to provide a coil component having such a magnetic core. The invention is directed to a magnetic core including: Fe-based soft magnetic alloy particles; and an oxide phase existing between the Fe-based soft magnetic alloy particles, wher…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01F27/255. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jul 20 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).