Abstract
Microsized Mn4N powders have been prepared via a convenient route by the reaction of pure electrolytic manganese powder and ammonia in a tube furnace at 900 °C. The microstructure, morphology, thermal stability, magnetism as well as electromagnetic properties were characterized by powder X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, vibrating sample magnetometer and vector network analyzer. The enhanced relative complex permeability, complex permittivity and static magnetic were achieved when compared with pure manganese. Moreover, Mn4N had good thermal stability and oxidation resistance below 300 °C in air. A possible mechanism of the improved properties of Mn4N was discussed based on first-principles calculations. The results revealed that Mn4N could be a potential microwave absorbent.
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The authors acknowledge the Supported by Program for New Century Excellent Talents in University (No. NCET-13-0071), the Fundamental Research Funds for the Central Universities (DUT14YQ201) and the Natural Science Foundation of Liaoning Province (No. 2013020098).
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Duan, Y., Xi, Q., Zhang, Y. et al. The thermal stability and microwave electromagnetic properties of Mn4N. Appl. Phys. A 120, 1075–1081 (2015). https://doi.org/10.1007/s00339-015-9282-1
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DOI: https://doi.org/10.1007/s00339-015-9282-1