磁性纳米洋葱碳基复合材料的制备及其吸波性能

邓钏; 张卫珂; 杨艳青; 高泽宇; 王佳玮; 卫贤贤

磁性纳米洋葱碳基复合材料的制备及其吸波性能

1.
太原理工大学环境科学与工程学院, 山西太原 030024;
2.
太原科技大学环境科学与安全学院, 山西太原 030024

基金项目: 中国博士基金第59批面上项目（2016M592654）；山西省青年科技研究基金（201601D021134）；山西省重点研发计划（社会发展领域，201803D31049）.

详细信息

作者简介:
邓钏,硕士研究生.E-mail:304989014@qq.com

通讯作者:
张卫珂,博士,副教授.E-mail:zhangweike@tyut.edu.cn

中图分类号: TM25
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出版历程
- 收稿日期: 2019-01-30
- 录用日期: 2019-04-30
- 修回日期: 2019-04-02
- 刊出日期: 2019-04-28

Preparation and microwave absorption properties of magnetic carbon nano-onion matrix composites

1.
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2.
College of Environmental Science and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, China

Funds: The 59th batch of Open Category China Postdoctoral Funds (2016M592654); Scientific Research Foundation for Young Scientists of Shanxi Province (201601D021134); The Key Research and Development Projects of Shanxi Province(201803D31049).

摘要

摘要: 采用化学气相沉积法制备了磁性纳米洋葱碳（MCNOs）和多壁纳米碳管（MWCNTs），超声喷雾造粒后制备得到MCNO/MWCNT复合吸波材料。通过XRD、SEM、TEM、Raman及VSM等手段表征所制材料的结构和磁性能，并采用微波矢量网络分析仪对材料的电磁参数进行测试。分别研究了MCNOs、MWCNTs及MCNO/MWCN三者的吸波性能，并探讨了其吸波机理。结果表明，相较于MCNOs和MWCNTs，同等条件下二者复合后在2~18 GHz频率范围内的吸波性能显著提高。微波吸收峰随材料涂层厚度的增加向低频方向移动，当涂层厚度为3.5 mm时，最大峰值可以达到-25.6 dB，在-10 dB以上有效带宽达到2.2 GHz；基于微波介电损耗机制，分析了不同材料在2~18 GHz频率范围内的电磁性能。
- 纳米洋葱碳 /
- 纳米碳管 /
- 碳-碳复合吸波材料 /
- 吸波性能 /
- 电磁参数
Abstract: Magnetic carbon nano-onions (MCNOs) and multi-wall carbon nanotubes (MWCNTs) were prepared by chemical vapor deposition using a stainless steel mesh as the substrate and a sol-gel derived LaFeO₃ as the catalyst. They were dispersed in water with a mass ratio of 1:1, and spray-dried with the assistance of ultrasonication to form hybrid granules. The morphology and magnetic permeability of the granules were investigated by XRD, SEM, TEM, Raman spectroscopy and a vibrating sample magnetometer. The granules were coated on a glass plate to evaluate their microwave absorption properties with a microwave vector network analyzer. Results showed that the absorption ability of the hybrid granule coatings was significantly improved in the frequency range 2-18 GHz compared with MCNOs or MWCNTs alone under the same conditions. With an increase of the coating thickness, the maximum absorption peak shifts to a lower frequency. The coating shows the best absorption properties when the thickness is 3.5 mm, where the maximum peak value reaches -25.6 dB and the effective bandwidth of less than -10 dB reaches 2.2 GHz.
- Carbon nano-onions /
- Multiwalled carbon nanotubes /
- Carbon-carbon composite absorbing materials /
- Absorption properties /
- Electromagnetic parameters

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