Microstructure and Magnetic Property Evolution Induced by Heat Treatment in Fe-Si/SiO2 Soft Magnetic Composites

SiO2 has been extensively studied as a superior insulating layer for innovative Fe-based soft magnetic composites (SMCs). During the preparation process of SMCs, appropriate heat treatment can effectively alleviate internal stress, reduce dislocation density, decrease coercivity, and enhance permeability. Maintaining uniformity integrity layers during is challenging task. Hence, it crucial to explore heat-treatment its effects on properties SMCs their layers. Herein, Fe–Si/SiO2 particles were prepared using chemical vapor deposition (CVD), having core–shell heterostructure synthesized through hot-press sintering, investigations conducted into how temperature affected microstructure SMCs. This study thoroughly investigated relationship between evolution properties. Additionally, impact time Fe-Si/SiO2 was evaluated. The results showed that in range 823–923 K, heterostructures grew more homogeneous uniform. Concurrently, stress defects inside eliminated. When raised over 973 disrupted, began disperse. After following (923 K) lasting up 60 min, resulting had high resistivity (1.04 mΩ·cm), lowest hysteresis loss (P10 mt/100 kHz 344.3 kW/m3), saturation magnetization (191.2 emu/g). presents new technique producing ceramic oxide also includes comprehensive analysis microstructure, properties, parameters. These findings are expanding potential applications oxide.