Enhancing the Properties of FeSiBCr Amorphous Soft Magnetic Composites by Annealing Treatments

Fe-based amorphous powder cores (AMPCs) were prepared from FeSiBCr amorphous powders with phosphate-resin hybrid coating. The high-frequency magnetic properties of AMPCs annealed at different temperatures were systematically studied. After annealing at low temperatures, the effective permeability and core loss improved due to the internal stress of the powder cores being released. The sample annealed at 480 degrees C exhibits the lowest hysteresis loss of about 29.6 mW/cm(3) at 800 kHz as well as a maximum effective permeability of 36.4, remaining stable until 3 MHz, which could be useful for high-frequency applications.

Automated summary

The high-frequency magnetic properties of FeSiBCr amorphous powder cores were studied, and it was found that annealing at low temperatures can improve the effective permeability and reduce core loss. The sample annealed at 480 degrees C showed the best magnetic performance.