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

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 dB@16.1 GHz and effective absorption bandwidth of 4.2 GHz at x = 0.1, displaying a potential role in absorbing material.