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论文类型：期刊论文

发表时间：2015-09-01

发表刊物：APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING

收录刊物：SCIE、EI、Scopus

卷号：120

期号：3

页面范围：1075-1081

ISSN号：0947-8396

摘要：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 A degrees 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 A degrees 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.