Pressure Powder Core
JP2026090528APending Publication Date: 2026-06-02PROTERIAL LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PROTERIAL LTD
- Filing Date
- 2026-02-27
- Publication Date
- 2026-06-02
AI Technical Summary
Technical Problem
Existing compacted magnetic cores face challenges in miniaturization and handling high currents due to insufficient dielectric breakdown fields, which also lead to a decrease in saturation magnetic flux density.
Method used
A compacted magnetic core is developed with an Fe-based soft magnetic alloy containing Al and Cr, featuring a grain boundary phase composed of an Al oxide layer and an Al nitride layer, which improves the dielectric breakdown field while maintaining saturation magnetic flux density.
Benefits of technology
The solution enhances the dielectric breakdown field and maintains high saturation magnetic flux density, achieving a compacted magnetic core with improved performance.
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Smart Images
Figure 2026090528000001_ABST
Abstract
The present invention provides a compacted magnetic core and a method for manufacturing the same, which improve the dielectric breakdown field while suppressing a decrease in saturation magnetic flux density. [Solution] The compacted magnetic core has a plurality of metal particles 20 made of an Fe-based soft magnetic alloy containing Fe, Al, and Cr, and a grain boundary phase 30 that binds the plurality of metal particles 20, wherein the metal particles 20 contain 7.98% by mass or more and 10% by mass or less of Al, and the grain boundary phase 30 comprises an Al oxide layer 31 and an Al nitride layer 32.
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