Synthesis and electromagnetic wave absorption property of amorphous carbon nanotube networks on a 3D graphene aerogel/BaFe12O19 nanocomposite

JOURNAL OF ALLOYS AND COMPOUNDS

卷:708

Article

Zhao, Tingkai¹  Ji, Xianglin¹  Jin, Wenbo¹  Xiong, Chuanyin¹  Ma, Wenxiu¹  Wang, Chuan¹  Duan, Shichang¹  Dang, Alei¹  Li, Hao¹  Li, Tiehu¹  Shang, Songmin²  Zhou, Zhongfu³ 

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, Shaanxi Engn Lab Graphene New Carbon Mat & Applic, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Hong Kong Polytech Univ, Inst Text & Clothing, Kowloon, Hong Kong, Peoples R China

[3] Aberystwyth Univ, Dept Phys, Aberystwyth SY23 3FL, Dyfed, Wales

关键词: 3D graphene aerogel;    ACNT networks;    BaFe12O19;    Electromagnetic wave absorption property;   

DOI  :  10.1016/j.jallcom.2017.03.001

来源: Elsevier

【 摘 要 】

Homogeneous amorphous carbon nanotube (ACNT) networks have been synthesized using floating catalyst chemical vapor deposition method on a 3D graphene aerogel (GA)/ BaFe12O19 (BF) nanocomposite which was prepared by a self-propagating combustion process. The as-synthesized ACNT/GA/BF nanocomposite with 3D network structures could be directly used as a good absorber material for electromagnetic wave absorption. The experimental results indicated that the minimum reflection loss of ACNT/GA/BF composite with a thickness of 2 mm was -18.35 dB at 10.64 GHz in the frequency range of 2-18 GHz. The frequency bandwidth of the reflection loss below -10 dB was 3.32 GHz and below -5 dB was 6.24 GHz, respectively. The 3D graphene aerogel structures which composed of dense interlined tubes and amorphous structure bearing quantities of dihedral angles could consume the incident waves through multiple reflection and scattering inside the 3D web structures. The interlinked ACNTs have both the virtues of amorphous CNTs (multiple reflection inside the wall) and crystalline CNTs (high conductivity), consuming the electromagnetic wave as resistance heat. ACNT/GA/BF composite has a good electromagnetic wave absorption performance. (C) 2017 Elsevier B. V. All rights reserved.

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