标题:Electromagnetic and absorption properties of nano-sized and micro-sized Fe4N particles
作者:Yu, Meijie; Xu, Yong; Mao, Qiong; Li, Fazhan; Wang, Chengguo
作者机构:[Yu, Meijie; Mao, Qiong; Li, Fazhan; Wang, Chengguo] Shandong Univ, Coll Mat Sci & Engn, Jinan 250061, Peoples R China.; [Xu, Yong] Shandong Jianzhu 更多
通讯作者:Yu, MJ
通讯作者地址:[Yu, MJ]Shandong Univ, Coll Mat Sci & Engn, Jinan 250061, Peoples R China.
来源:JOURNAL OF ALLOYS AND COMPOUNDS
出版年:2016
卷:656
页码:362-367
DOI:10.1016/j.jallcom.2015.10.005
关键词:Iron nitride; Nanoparticle; Electromagnetic property; X-ray diffraction
摘要:Single-phase Fe4N has been synthesized by gaseous nitriding micro-sized and nano-sized Fe particles at 793 K under ammonia atmosphere. The electromagnetic properties of their wax composite with 75 wt% magnetic particles have been investigated within the frequency range of 1-18 GHz. Both size and phase effects on the microwave absorption properties were discussed on the results of scanning electronic microscopy, X-ray diffraction, hysteresis loop, and the frequency dependence of complex permittivity and permeability. The results show that nano-sized particles have superior absorbing performance at lower frequency band than the corresponding micro-sized ones, which is mainly attributed to the higher dielectric constant caused by interfacial polarization. The Fe4N composites exhibit much stronger absorption in 2-8 GHz than Fe composites. The reflection loss (RL) values of less than -10 dB are observed in a wide frequency bandwidth from 1.8 to 11 GHz for nano-sized Fe4N composite with absorber thickness of 1.2-5.0 mm. Its minimum RL value (RLmin = -33 dB) appears at 3.5 GHz with a thickness of 3.0 mm. This study demonstrates the possible application of producing thin and light absorbers from nano-sized Fe4N particles for microwave absorption at S and C bands (2-8 GHz). (C) 2015 Elsevier B.V. All rights reserved.
收录类别:SCOPUS;SCIE
WOS核心被引频次:7
Scopus被引频次:6
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943604618&doi=10.1016%2fj.jallcom.2015.10.005&partnerID=40&md5=a5f240c201fc7d8451cc7dda9e5ddf53
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