<strong>FeCo/SnO<sub>2</sub></strong> 复合纳米纤维的制备及其吸波性能

doi:10.11901/1005.3093.2022.150

材料研究学报

2023, Vol. 37

Issue (2): 102-110 DOI: 10.11901/1005.3093.2022.150

研究论文

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FeCo/SnO₂ 复合纳米纤维的制备及其吸波性能

张开银¹, 王秋玲¹, 向军²(

)

^1.武夷学院机电工程学院武夷山 354300
^2.江苏科技大学理学院镇江 212100

Microwave Absorption Properties of FeCo/SnO₂ Composite Nanofibers

ZHANG Kaiyin¹, WANG Qiuling¹, XIANG Jun²(

)

^1.School of Mechanical and Electrical Engineering, Wuyi University, Wuyishan 354300, China
^2.School of Science, Jiangsu University of Science and Technology, Zhenjiang 212003, China

引用本文:

张开银, 王秋玲, 向军. FeCo/SnO₂ 复合纳米纤维的制备及其吸波性能[J]. 材料研究学报, 2023, 37(2): 102-110.
Kaiyin ZHANG, Qiuling WANG, Jun XIANG. Microwave Absorption Properties of FeCo/SnO₂ Composite Nanofibers[J]. Chinese Journal of Materials Research, 2023, 37(2): 102-110.

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摘要:

用静电纺丝和氢气还原法制备FeCo/SnO₂复合纳米纤维并使用X射线衍射、扫描电子显微镜、振动样品磁强计和矢量网络分析仪等手段分析表征其结构、形貌、磁性及电磁特性，研究了SnO₂含量对复合纳米纤维的吸波性能的影响。结果表明，添加适量的SnO₂可显著提高FeCo纳米纤维的吸波性能。用SnO₂摩尔含量为20%的复合纳米纤维制备的厚度仅为1.4 mm的涂层，在频率10.95 GHz处最小反射损耗(RL)为-40.2 dB，有效吸收带宽(RL≤-10 dB)为2.64 GHz (9.75-12.39 GHz)，厚度减小到1.0 mm的涂层其最大有效吸收带宽为4.16 GHz，频率范围为13.84~18.00 GHz。涂层吸波性能优异的主要原因，是阻抗匹配的改善、磁性FeCo合金与介电SnO₂的电磁损耗协同作用、加强的界面极化驰豫以及纳米纤维形成的三维网络结构产生的多重反射与散射。

关键词 ：复合材料, FeCo合金, SnO₂, 纳米纤维, 微波吸波, 静电纺丝

Abstract：

A novel nanofibrous absorber composed of FeCo alloy and SnO₂ has been synthesized through electrospinning coupled with hydrogen reduction. Its structure, morphology, magnetic and electromagnetic properties were characterized by X-ray diffractometer, scanning electron microscopy, vibrating sample magnetometer and vector network analyzer, and the effect of the molar ratio of SnO₂ to FeCo on the microwave absorption properties of the composite nanofibers is investigated. It was found that the introduction of an appropriate amount of SnO₂ can significantly enhance the microwave absorption properties of FeCo/SnO₂ nanofibers as a result of the improved impedance matching, the good synergistic effect between magnetic FeCo alloy and dielectric SnO₂, and the enhanced interfacial polarization relaxation, as well as the multiple scattering and reflection caused by the 3D network structure formed by the nanofibers. When the SnO₂ molar content in the nanofibers is 20% the minimal reflection loss value of -40.2 dB is obtained at 10.95 GHz for a thin coating of 1.4 mm, and the corresponding effective absorption bandwidth with reflection loss lower than -10.0 dB is about 2.64 GHz (9.75-12.39 GHz). Moreover, when the coating thickness is reduced to 1.0 mm, the effective absorption bandwidth reaches 4.16 GHz (13.84~18.00 GHz). These excellent absorbing performances suggest that the FeCo/SnO₂ composite nanofibers designed here could be a promising electromagnetic absorbing material with a strong and broad absorption band.

Key words： composite FeCo alloys SnO₂ nanofibers microwave absorption electrospinning

收稿日期: 2022-03-17

ZTFLH:

TB333

基金资助:福建省自然科学基金(2020J01393);国家自然基金(51271059);武夷学院引进人才科研启动项目(YJ202115);武夷学院引进人才科研启动项目(YJ202116)

作者简介: 张开银，男，1973年生，教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2022.150 或 https://www.cjmr.org/CN/Y2023/V37/I2/102

图1 FeCo/SnO2纳米复合纤维的XRD谱

图2 FCSO0、FCSO1和FCSO2的FESEM照片

图3 FeCo/SnO2纳米复合纤维的室温磁滞回线

图4 FeCo/SnO2纳米复合纤维的复介电常数、介电损耗正切、复磁导率和磁损耗正切的频率依赖性

图5 FCSO0、FCSO1和FCSO2的Cole-Cole曲线及其μ″(μ' )–2f–1值

图6 FCSO0、FCSO1和FCSO2的RL曲线以及λ/4条件下厚度与RL峰值频率的关系

表1 部分铁磁金属/介电氧化物复合材料的吸波性能

图7 FeCo/SnO2复合纳米纤维的衰减常数和阻抗匹配率

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