Abstract
Herein, spinel Mn0.4Zn0.6Fe2O4 powders were fabricated utilizing a novel high-temperature mechanochemical method (HTMC), which achieves the coupling effect of high-temperature and mechanical force in a single process. The microstructure, chemical composition, magnetic properties, and electromagnetic wave absorption (EMWA) characteristics of the Mn0.4Zn0.6Fe2O4 powders were thoroughly considered in 2–18 GHz. The results reveal that with a matching thickness of 4.3 mm and a frequency of 6.2 GHz, S3 exhibits an effective absorption bandwidth that covers 4.56–7.48 GHz and has a minimum reflection loss (RLmin) of −43.8 dB. The excellent EMWA properties of the Mn0.4Zn0.6Fe2O4 powders can be ascribed to their effective cooperation between dielectric loss and magnetic loss as well as favorable impedance matching. Considering the performance enhancement generated by the distinctive coupling of multiple mechanisms in HTMC and the excellent EMWA properties of the as-prepared single Mn0.4Zn0.6Fe2O4 powders, it has significant potential in the field of fabricating efficient MAMs.
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