Ni0.4Co0.2Zn0.4Fe2O4/BaTiO3纳米纤维双层吸波涂层的微波吸收特性研究

doi:10.15541/jim20140521

无机材料学报 ›› 2015, Vol. 30 ›› Issue (5): 479-486.DOI: 10.15541/jim20140521 CSTR: 32189.14.10.15541/jim20140521

Ni_0.4Co_0.2Zn_0.4Fe₂O₄/BaTiO₃纳米纤维双层吸波涂层的微波吸收特性研究

李佳乐^1,2, 向军¹, 叶芹¹, 刘敏¹, 沈湘黔²

(1. 江苏科技大学数理学院, 镇江 212003; 2. 江苏大学材料科学与工程学院, 镇江 212013)

收稿日期:2014-10-11 修回日期:2014-12-01 出版日期:2015-05-20 网络出版日期:2015-04-28
作者简介:李佳乐(1990–), 男, 硕士研究生. E-mail: ljljust@163.com
基金资助:
国家自然科学基金(51274106); 博士后科学基金(2013M540418); 江苏省博士后科研资助计划(1301055B); 江苏省普通高校研究生科研创新计划(KYLX-1084)

Microwave Absorption Properties of Double-layer Absorbing Coatings Based on Ni_0.4Co_0.2Zn_0.4Fe₂O₄ and BaTiO₃ Nanofibers

LI Jia-Le^{1, 2}, XIANG Jun¹, YE Qin¹, LIU Min¹, SHEN Xiang-Qian²

(1. School of Mathematics and Physics, Jiangsu University of Science and Technology, Zhenjiang 212003, China; 2. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212003, China)

Received:2014-10-11 Revised:2014-12-01 Published:2015-05-20 Online:2015-04-28
About author:LI Jia-Le. E-mail: ljljust@163.com
Supported by:
National Natural Science Foundation of China (51274106); China Postdoctoral Science Foundation (2013M540418); Jiangsu Planned Projects for Postdoctoral Research Funds (1301055B); Postgraduate Research and Innovation Project of?University?in Jiangsu Province (KYLX-1084)

摘要/Abstract

摘要：

采用静电纺丝法制备了平均直径分别为180 nm和220 nm的BaTiO₃(BTO)和Ni_0.4Co_0.2Zn_0.4Fe₂O₄(NCZFO)纳米纤维, 使用X射线衍射(XRD)、场发射扫描电镜(FESEM)和矢量网络分析仪(VNA)对纤维的物相结构、表面形貌和微波电磁参数进行了表征, 并根据传输线理论分析评估了以BTO和NCZFO纳米纤维为吸收剂的硅橡胶基单层和双层结构吸波涂层在2~18 GHz范围内的微波吸收性能。结果显示, 由于BTO纳米纤维的介电损耗与NCZFO纳米纤维的磁损耗的有机结合和阻抗匹配特性的改善, 以NCZFO纳米纤维/硅橡胶复合体(S1)为匹配层、BTO纳米纤维/硅橡胶复合体(S2)为吸收层的双层吸波涂层比相应单层吸波涂层表现出更为优异的吸收性能。通过调节匹配层与吸收层的厚度, 在4.9~18 GHz范围内反射损耗可达–20 dB以下; 当吸收层和匹配层的厚度分别为2.3 mm和0.5 mm时, 最小反射损耗位于9.5 GHz达–87.8 dB, 低于–20 dB的吸收带宽为5 GHz。优化设计的NCZFO/BTO纳米纤维双层吸波涂层有望发展成为一种新型的宽频带强吸收吸波材料。

关键词: Ni-Co-Zn铁氧体纳米纤维, BaTiO₃纳米纤维, 静电纺丝, 双层吸波涂层, 微波吸收特性

Abstract:

BaTiO₃(BTO) nanofibers (NFs) and Ni_0.4Co_0.4Zn_0.4Fe₂O₄ (NCZFO) NFs with average diameters of about 180 nm and 220 nm, respectively, were prepared by electrospinning method. Their phase structures, surface morphologies and electromagnetic parameters were characterized by X-ray diffraction (XRD), field mission scanning electron microscope (FESEM) and vector network analyzer. Microwave absorption properties of both single- and double-layer silicone rubber based absorbing coatings with either 70wt% BTO NFs or NCZFO NFs as microwave absorbents were evaluated according to the transmission line theory in the frequency range of 2–18 GHz. The results show that the double-layer absorbing coatings with the NCZFO NFs/silicone rubber composite (S1) as matching layer and the BTO NFs/silicone rubber composite (S2) as absorbing layer display superior microwave absorbing performance compared to the single-layer ones due to the proper combination of magnetic loss of NCZFO NFs and dielectric loss of BTO NFs, and the improved impedance matching characteristics. The double-layer absorbing coatings have a reflection loss (RL) of less than –20 dB over the frequency range of 4.9–18 GHz through appropriately adjusting the thicknesses of the absorbing layer and matching layer. When the thicknesses of the absorbing layer and the matching layer are 2.3 and 0.5 mm, respectively, the minimum RL reaches –87.8 dB at 9.5 GHz and the absorption bandwidth with the RL values below –20 dB is up to 5 GHz. The optimal NCZFO NFs/BTO NFs double-layer absorbing coatings can become a novel microwave absorption material with strong-absorption and broad-band.

Key words: Ni-Co-Zn ferrite nanofiber, BaTiO₃ nanofiber, electrospinning, double-layer absorber, microwave absorption properties

中图分类号:

TM25
TQ343

李佳乐, 向军, 叶芹, 刘敏, 沈湘黔. Ni_0.4Co_0.2Zn_0.4Fe₂O₄/BaTiO₃纳米纤维双层吸波涂层的微波吸收特性研究[J]. 无机材料学报, 2015, 30(5): 479-486.

LI Jia-Le, XIANG Jun, YE Qin, LIU Min, SHEN Xiang-Qian. Microwave Absorption Properties of Double-layer Absorbing Coatings Based on Ni_0.4Co_0.2Zn_0.4Fe₂O₄ and BaTiO₃ Nanofibers[J]. Journal of Inorganic Materials, 2015, 30(5): 479-486.

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Ni_0.4Co_0.2Zn_0.4Fe₂O₄/BaTiO₃纳米纤维双层吸波涂层的微波吸收特性研究

Microwave Absorption Properties of Double-layer Absorbing Coatings Based on Ni_0.4Co_0.2Zn_0.4Fe₂O₄ and BaTiO₃ Nanofibers

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