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P-GN/Ni复合材料的制备及其微波吸收性能研究

张琳雪，孙 勇，努尔尼沙·阿力甫
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2021年 第40卷 第2期: 1000-6281（2021）02-106-08     下载地址：

P-GN/Ni复合材料的制备及其微波吸收性能研究

张琳雪，孙 勇，努尔尼沙·阿力甫

（1.新疆医科大学医学工程技术学院，省部共建中亚高发病成因与防治国家重点实验室，新疆乌鲁木齐830011；2.西北大学物理学院，陕西西安710069）

摘 要 本文采用一步溶剂热法成功制备了磷掺杂石墨烯/Ni纳米复合材料（P-GN/Ni），并系统研究了其微纳结构和微波吸收性能。透射电镜（TEM）结果显示Ni纳米颗粒呈海胆状，并均匀地负载在半透明褶皱的磷掺杂石墨烯（P-GN）上。相比单独的海胆状Ni纳米颗粒，P-GN/Ni纳米材料表现出优异的微波吸收能力。在厚度仅为1.5 mm时，复合材料在17.3 GHz下反射损耗值（RL）达到了-34.8 dB且有效吸收带宽（RL<-10 dB）为3.7 GHz。复合材料的厚度为1.5-5.0 mm时，其有效吸收带宽为14.9 GHz（3.1-18 GHz），覆盖S波段到X波段，在微波吸收领域具有潜在的应用价值。微波吸收机制研究表明P-GN的引入，一方面利用磁损材料与电损材料的协同效应优化了阻抗匹配，另一方面极大地增加了材料的电导率和界面极化能力，提高了复合材料对电磁波的衰减能力。

关键词 P-GN/Ni；海胆状；微波吸收材料；微观结构

中图分类号： 文献标识码：A    doi:10.3969/j.issn.1000-6281.2021.02.002

 

Synthesis of P-GN/Ni hybrids and their electromagnetic wave absorption properties

ZHANG Lin-xue1，SUN Yong2，NUERNISHA Alifu1

(1. School of Medical Engineering and Technology, Xinjiang Medical University, Urumqi Xinjiang 830011；

2. School of Physics, Northwest University, Xi’an Shanxi 710069, China)

Abstract  Phosphorus-doped graphene/Ni (P-GN/Ni) were fabricated by one-pot solvothermal route, and their morphologies, crystal structure and microwave absorption properties were investigated in detail. Transmission electron microscopy (TEM) shows that urchin-like Ni nanoparticles were uniformly loaded on transparent P-GN with paper-like structure. Compared with the pure Ni nanocrystals，P-GN/Ni hybrids show enhanced microwave absorption properties. The results show that the maximum reflection loss (RL) of P-GN/Ni hybrids can reach -34.8 dB at 17.3 GHz and the effective absorption bandwidth (RL <-10 dB) is 3.7 GHz with a thickness of 1.5 mm. Besides, an effective absorption bandwidth (RL<-10 dB) of 14.9 GHz (3.1-18 GHz) can be achieved when the absorber thickness is in the ranges of 1.5-5.0 mm, covering S band to X band, which has potential application value in microwave absorption field. Microwave absorption mechanism shows that the introduction of P-GN can optimized the impedance matching by using the synergistic effect of magnetic loss material and electrical loss material. Meanwhile, P-GN can greatly increase the conductivity and interfacial polarization capability of the hybrids, improving the microwave absorption attenuation capability of the hybrids.

Keywords  P-GN/Ni; urchin-like; microwave absorption materials; microstructure

 

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