Absorbing property of MnO2 nanorods and its meta-surface design

被引：0
|
作者：
Song Y. [1 ]
Bi S. [1 ]
Hou G. [1 ]
Li H. [1 ]
Zhao Y. [1 ]
Liu Z. [1 ]
机构：
[1] Rocket Force University of Engineering, Xi'an
来源：
Cailiao Gongcheng/Journal of Materials Engineering | 2022年 / 50卷 / 07期
关键词：
absorbing mechanism; hydrothermal method; meta-surface; MnO[!sub]2[!/sub] nanorod;
D O I：
10.11868/j.issn.1001-4381.2021.000855
中图分类号：
学科分类号：
摘要：
MnO2 nanorods were prepared by using the hydrothermal method and freeze-drying technology, and then molded into the MnO2/paraffin circular samples in different filling concentrations. The crystalline phase, microstructure and electromagnetic parameters of the samples were characterized and tested by X-ray diffractometer (XRD), scanning electron microscopy (S E M), and vector network analyzer (V N A). Sample meta-surface was designed and simulated by CST software and the pre and post simulation calculation and research of the meta-surface were carried out. The results show that prepared MnO2 powder has a rod structure with the diameter and length of the rod about 50-100 nm, 5-10 μm, respectively. The single cylindric structure is well-shaped, and the overall structure is homogeneous with crystallinity. Moreover, the tangent of dielectric loss(tanδ) increases with concentration, making a great contribution to the electromagnetic attenuation coefficient (α) of the sample of MnO2/paraffin, which increases with filling concentration of MnO2 nanorods. Microwave absorption frequency domain of MnO2/paraffin material is significantly broadened by the design of meta-surface, namely, the optimal bandwidth in 2-18 GHz can reach 14. 32 GHz. The reason is the superposition of absorption peaks over a specified frequency range, which is caused by the coexistence of multiple resonances of the meta-surface. © 2022 Beijing Institute of Aeronautical Materials (BIAM). All rights reserved.
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页码：110 / 118
页数：8
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