Preparation and radar-absorbing properties of Al2O3/TiO2/Fe2O3/Yb2O3 composite powder

Yi-fan Zhang; Zhen Ji; Ke Chen; Cheng-chang Jia; Shan-wu Yang; Meng-ya Wang

doi:10.1007/s12613-017-1398-1

Volume 24 Issue 2

Feb. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(2): 216-221

Yi-fan Zhang, Zhen Ji, Ke Chen, Cheng-chang Jia, Shan-wu Yang, and Meng-ya Wang, Preparation and radar-absorbing properties of Al₂O₃/TiO₂/Fe₂O₃/Yb₂O₃ composite powder, Int. J. Miner. Metall. Mater., 24(2017), No. 2, pp. 216-221. https://doi.org/10.1007/s12613-017-1398-1

Cite this article as:

Yi-fan Zhang, Zhen Ji, Ke Chen, Cheng-chang Jia, Shan-wu Yang, and Meng-ya Wang, Preparation and radar-absorbing properties of Al2O3/TiO2/Fe2O3/Yb2O3 composite powder, Int. J. Miner. Metall. Mater., 24(2017), No. 2, pp. 216-221. https://doi.org/10.1007/s12613-017-1398-1

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Research Article

Preparation and radar-absorbing properties of Al₂O₃/TiO₂/Fe₂O₃/Yb₂O₃ composite powder

+ Author Affiliations

Corresponding author:
Zhen Ji E-mail: jizhen@mater.ustb.edu.cn
Received: 24 June 2016; Revised: 22 July 2016; Accepted: 22 October 2016

Abstract

Abstract

Al₂O₃/TiO₂/Fe₂O₃/Yb₂O₃ composite powder was synthesized via the sol-gel method. The structure, morphology, and radar-absorption properties of the composite powder were characterized by transmission electron microscopy, X-ray diffraction analysis and RF impedance analysis. The results show that two types of particles exist in the composite powder. One is irregular flakes (100-200 nm) and the other is spherical Al₂O₃ particles (smaller than 80 nm). Electromagnetic wave attenuation is mostly achieved by dielectric loss. The maximum value of the dissipation factor reaches 0.76 (at 15.68 GHz) in the frequency range of 2-18 GHz. The electromagnetic absorption of waves covers 2-18 GHz with the matching thicknesses of 1.5-4.5 mm. The absorption peak shifts to the lower-frequency area with increasing matching thickness. The effective absorption band covers the frequency range of 2.16-9.76 GHz, and the maximum absorption peak reaches -20.18 dB with a matching thickness of 3.5 mm at a frequency of 3.52 GHz.
- nanocomposites;
- radar absorbing materials;
- sol-gel processing;
- electromagnetic wave attenuation

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