Journal
RSC ADVANCES
Volume 7, Issue 59, Pages 37276-37285Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra06716j
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Funding
- Natural Science Foundation of China [51572221, 51672221]
- China Aeronautical Science Fund [2014ZF53074]
- Natural Science Foundation of Shaanxi Province [2016JQ5108]
- Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University [Z2017011]
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The development of high reflection loss and broad frequency bandwidth for electromagnetic wave absorbing materials has been pursued for a long time. Constructing a rational microstructure of an absorber will have significant impact on reflection loss increase and frequency bandwidth broadening. Herein, we successfully prepare a sandwich microstructured graphene/BaFe12O19 nanocomposite by an in situ auto-combustion method. Compared to pure BaFe12O19, the sandwich microstructured graphene/BaFe12O19 showed better electromagnetic wave absorbing properties. Furthermore, the sandwich microstructured graphene/Ba0.8La0.2Fe12O19 nanocomposite was prepared with La-doped BaFe12O19 using the same method. The obtained graphene/Ba0.8La0.2Fe12O19 nanocomposite exhibited a saturation magnetization of 26.55 emu g(-1) at room temperature and exhibited excellent magnetic performance. The maximum reflection loss of the sandwich microstructured graphene/Ba0.8La0.2Fe12O19 nanocomposite with a thickness of 1 mm could reach up to -40.26 dB, and a frequency bandwidth value below -10 dB was observed up to 3.87 GHz within the frequency range of 2-18 GHz.
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