New Fe-based amorphous soft magnetic composites with significant enhancement of magnetic properties by compositing with nano-(NiZn)Fe2O4

Amorphous soft magnetic composites based on spherical Fe76Si9B10P5 amorphous powder made by gas atomization and (NiZn)Fe2O4 nanoparticles dispersed in epoxy resin are investigated in details. Scanning electron microscopy and energy-dispersive X-ray spectroscopy analysis revealed that the surface layer of the amorphous powder consisted of (NiZn)Fe2O4 nanoparticles and epoxy resin with uniform surface coverage. The samples composited with (NiZn)Fe2O4 nanoparticles have an significant enhancement of permeability in comparison with uncoated ones. The permeability of the composite cores at 20 kHz is 101 with the addition of 2 wt% (NiZn)Fe2O4 nanoparticles, which was increased 44% as compared with that of uncoated samples (70). In addition, it could be able to maintain a relatively low core loss of 1210 mW/cm3 (Bm = 0.1 T, f = 100 kHz). The compound Fe76Si9B10P5/(NiZn)Fe2O4 soft magnetic composites with excellent soft magnetic properties provide great potential for expanding the application of various electronic components like low frequency filters, DC output chokes and resonant inductors. •ASMCs based on Fe76Si9B10P5/nano-(NiZn)Fe2O4 was fabricated.•We have made design on the insulation layer on the surface of amorphous powder.•Compositing with (NiZn)Fe2O4 has significant enhancement in permeability of ASMCs.