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Title: Synthesis of sandwich microstructured expanded graphite/barium ferrite connected with carbon nanotube composite and its electromagnetic wave absorbing properties
Authors: Zhao, TK
Jin, WB
Ji, XL
Yan, HB
Jiang, YT
Dong, Y
Yang, YL
Dang, AL
Li, H
Li, TH
Shang, SM 
Zhou, ZF
Keywords: Expanded graphite
Carbon nanotube
Sol-gel auto-combustion
Sandwich microstructure
Electromagnetic wave absorbing property
Issue Date: 2017
Publisher: Elsevier
Source: Journal of alloys and compounds, 2017, v. 712, p. 59-68 How to cite?
Journal: Journal of alloys and compounds 
Abstract: The pursuing aim of high reflection loss and broad frequency bandwidth for electromagnetic wave (EMW) absorbing materials is a long-term task and under a close scrutiny. To construct rational microstructures for the absorber have significant impacts on increasing reflection loss and broadening frequency bandwidth. Herein, we presented a sandwich microstructured expand graphite (EG)/BaFe12O19 (BF) nanocomposite successfully prepared by in-situ sol-gel auto-combustion method. The experimental results showed that EG/BF nanocomposite has better EMW absorbing performance than pure EG and BF, the sandwich microstructured EG/BF connected with carbon nanotubes (CNTs) could further improve the electromagnetic performance effectively. The obtained CNT/EG/BF nanocomposite exhibited a saturation magnetization of 26.5 emu g(-1), at room temperature and an excellent EMW absorbing performance. The maximum reflection loss of the sandwich microstructured CNT/EG/BF composites with a thickness of 1 mm was up to -45.8 dB and the frequency bandwidth below -10 dB could reach to 4.2 GHz within the frequency range of 2-18 GHz. The research results indicated that the prepared nanocomposite showed great potential as a new type of microwave absorbing material.
ISSN: 0925-8388
EISSN: 1873-4669
DOI: 10.1016/j.jallcom.2017.04.070
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