The preparation and magnetic properties of FeSiCr/MoS2 soft magnetic composites

Abstract Two-dimensional layered material MoS 2 was used as a high-resistance insulating material and coated on FeSiCr magnetic powder, and FeSiCr/MoS 2 composites with low loss and high permeability were successfully prepared. The morphology and magnetic properties of FeSiCr/MoS 2 composites were analyzed by XRD, SEM and B-H analyzer. The results show that although the addition of MoS 2 will dilute the magnetic properties of FeSiCr, it still has high permeability and obviously reduces the magnetic loss of FeSiCr powder. At the same time, the addition of MoS 2 also improves the frequency stability and quality factor of the composite powder cores. Especially, when the MoS 2 content is 1.5 wt%, FeSiCr/MoS 2 composites show the best magnetic properties after annealing at 500 °C. with a loss of 330 mW cm −3 and permeability of 66.75 ( B m = 20 mT and f = 1000 kHz). It can be seen that the MoS 2 coating has a good effect on reducing the magnetic loss of powder core, which significantly improves the possibility of application of SMCs at high frequency.