| As the third generation of semiconductor devices evolves towards higher frequencies and miniaturization, traditional soft magnetic materials are no longer sufficient. In recent years, iron-based amorphous/nanocrystalline soft magnetic alloy materials, known for their excellent soft magnetic properties and ultra-low high-frequency magnetic loss, have been facilitating the miniaturization, efficiency enhancement, and energy saving of power electronic devices. Our team has developed soft magnetic powder cores with a uniform fine nano dual-phase composite structure through a series of processes including multi-stage atomization milling, insulating coating, and compression molding. Under optimal processing conditions, the samples exhibited a magnetic permeability of up to 90, high resistance to DC bias (maintaining over 60% of magnetic permeability under 100 Oe), and low core losses of 265 mW/cm3 at 100 kHz@50mT and 1000 mW/cm3 at 100 kHz@100mT. The application of these amorphous/nanocrystalline magnetic powder cores significantly enhances the energy conversion efficiency of power electronic devices and plays an important role in the realization of intelligent and efficient electronic information technology. |
