Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Abstract

Abstract With the advancement of electrical and electronic devices, overcoming electromagnetic pollution turns into an urgent problem. In this work, high‐valence molybdenum (Mo 6+ ) was doped into M‐type hexagonal barium ferrite (BaFe 12‐x Mo x O 19 ) to improve its electromagnetic performance. The relationship between the Mo 6+ doping concentration and the crystallographic structure, morphology and electromagnetic properties was studied in detail. Structural characterizations authenticate that the Mo 6+ ions prefer the 2b site, increasing the lattice values and grain size, and boosting more Fe 3+ conversion into Fe 2+ . The magnetic hysteresis loops demonstrate a reduction of saturation magnetization and coercivity values with the increase of Mo 6+ concentration. While the microwave absorption properties were obviously improved by the doping Mo 6+ , and obtained the highest RL min value of ‐56.12 [email protected] GHz and effective absorption bandwidth of 4.2 GHz at x = 0.1, displaying a potential role in absorbing material.