FeNi/Glass Soft Magnetic Composites with High Magnetic Properties

FeNi/glass composites with 0 wt%,1 wt%, and 2 wt% glass content are produced, and their soft magnetic properties are systematically studied. The scanning electron microscope (SEM) results indicate that the FeNi particles are surrounded by glass powder. With the addition of glass powder, the saturation magnetization of the FeNi/glass composites decreases from 170 to 158 emu/g, and the effective permeability decreases from 56.1 to 39.1. With the increase of glass content, the imaginary part μ ″ is reduced, indicating that the eddy current loss or excess loss is reduced at high frequency. The magnetic loss measurement results show that the addition of glass powder greatly reduces the eddy current loss. Furthermore, the FeNi/glass composite core with 2 wt% glass content has moderate permeability, higher quality factor Q , and better DC bias characteristics than other cores. The results show that the ideal glass powder content can improve the magnetic properties of FeNi composite materials, and glass powder can be used as an insulator in soft magnetic composites (SCMs).