4.7 Article

Electromagnetic wave absorption properties of cobalt-zinc ferrite nanoparticles doped with rare earth elements

期刊

JOURNAL OF RARE EARTHS
卷 39, 期 11, 页码 1415-1426

出版社

ELSEVIER
DOI: 10.1016/j.jre.2020.08.011

关键词

Cobalt-zinc ferrite; Rare earth elements; Microwave absorbing property; Hydrothermal method; Effective absorption bandwidth

资金

  1. National Key Research and Development Program of China [2017YFB0304301]
  2. National Natural Science Foundation of China [51804346]
  3. China Postdoctoral Science Foundation [2020T130730]

向作者/读者索取更多资源

Doping rare earth elements into Co-Zn ferrite nanoparticles can enhance their permeability and improve their electromagnetic wave absorption performance. The study shows that with increasing doping amounts, the particle morphology and absorption performance of the nanoparticles change.
Traditional ferrites are of poor electromagnetic wave (EMW) absorption while doping rare earth elements (REEs) can greatly enhance their permeability to improve the EMW loss performance. In this study, Co-Zn ferrite nanoparticles doped with various amounts of REEs (Gd3+, Nd3+ and Pr3+) were synthesized by a hydrothermal method, and their particle morphology and an EMW absorption performance were characterized by using transmission electron microscopy (TEM) and a Vector network analyzer (VNA). The results show that the initial spherical Co-Zn ferrite nanoparticles present an irregular quadrilateral structure after Gd3+ doping, and the average particle size of Co0.5Zn0.5-xGdxFe2O4 increases from 26 to 50 nm with x increasing from 0 to 0.35. At x of 0.25, the reflectivity absorbance achieves-27.94 dB at 18 GHz with the effective absorption bandwidth (EAB) of 4.08 GHz at a sample thickness of 2.5 mm. When Nd3+ doping amount reaches x = 0.3, the minimum reflection loss (RL) is-25.63 dB at 18 GHz and EAB is 3.91 GHz. Doping Pr3+ (x = 0.25) in the sample broadens EAB, and the minimum RL is-16.1 dB at 16.81 GHz and EAB is 7.31 GHz. This study shows that the magnetic moment produced by doping REES can form magnetic domains, which affects the incident EMW and improves the magnetic loss. It is expected that REEs-doped Co-Zn ferrite nanoparticles can be used as efficient electromagnetic shielding materials in aerospace. (C) 2021 The Authors. Published by Elsevier B.V.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据