软磁性粉末、压粉磁芯、磁性元件以及电子设备
By employing a specific composition and the design of Cu segregation zones, soft magnetic powder achieves high permeability and low iron loss at high frequencies, solving the problem of low efficiency of soft magnetic powder at high frequencies in existing technologies and improving electromagnetic conversion efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SEIKO EPSON CORP
- Filing Date
- 2023-01-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing soft magnetic powders are difficult to achieve excellent soft magnetic properties and high electromagnetic conversion efficiency at high frequencies, and the loss is relatively high at high frequencies.
The soft magnetic powder has a specific composition, which includes Fe-Si crystal particles with a particle size of 1.0 nm or more and 30.0 nm or less. Cu segregation portions are provided on the surface and inside of the particles. The number ratio of Cu segregation portions on the surface is more than 80%, the number ratio of Cu segregation portions inside is more than 80%, and the number of second Cu segregation portions is more than twice that of first Cu segregation portions.
It achieves high permeability and low iron loss at high frequencies, improves electromagnetic conversion efficiency, and reduces coercivity and eddy current losses.
Smart Images
Figure CN116504479B_ABST