Broad microwave absorption bandwidth achieved by exchange coupling interaction between hard and soft magnetic materials
Broad microwave absorption bandwidth achieved by exchange coupling interaction between hard and soft magnetic materials
复制标题
通过硬磁材料和软磁材料之间的交换耦合相互作用实现宽的微波吸收带宽
DOI：
10.1016/j.ceramint.2020.09.011
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发表时间：
2021-01-15
影响因子：
5.2
通讯作者：
Zhang, Yujing
中科院分区：
文献类型：
--
作者：
Fang, Gang;Liu, Chuyang;Zhang, Yujing
为了在2-18 GHz范围内获得较宽的微波吸收带宽，本工作合成了硬/软磁复合材料Ba(Zr-Ni)(0.6)Fe10.8O19/Fe3O4。结果表明，随着热处理温度的升高，更多的Fe3O4粒子附着在Ba(Zr-Ni)(0.6)Fe10.8O19粒子上，增加了Ba2Fe10.8O19与Fe3O4之间的界面数目，增强了硬/软交换耦合效应。最后，400℃热处理的样品具有12.4 GHz的最宽磁损耗区，在1.9 mm处的有效吸收带宽为6.68 GHz。它的性能优于大多数最先进的微波吸收器。
To gain broad microwave absorption bandwidth over 2-18 GHz, hard/soft magnetic composites Ba(Zr-Ni)(0.6)Fe10.8O19/Fe3O4 have been synthesized in this work. The results show that the raising heat treatment temperature would cause more Fe3O4 particles attach to Ba(Zr-Ni)(0.6)Fe10.8O19 particles, increasing the number of interfaces between Ba(Zr-Ni)(0.6)Fe10.8O19 and Fe3O4 to enhance the hard/soft exchange coupling effect. Finally, the sample heat treated at 400 degrees C possesses the widest magnetic loss range (mu ''>0.2) of 12.4 GHz, which contributes to a broad effective absorbing bandwidth of 6.68 GHz at 1.9 mm. The performance is superior than most of the state-of-the-art microwave absorbers.