期刊
COMPOSITES PART B-ENGINEERING
卷 132, 期 -, 页码 141-150出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2017.09.001
关键词
3-Dimensional reinforcement; Microstructures; Surface analysis; Heat treatment; Carbon@Fe2O3/Fe3C/Fe nanoparticles; Enhanced microwave absorption
资金
- National Natural Science Foundation of China [51172050, 51102060, 51102063, 51202045]
- Postdoctoral Science Foundation of China [2013M531036]
- Shandong Province Young and Middle-Aged Scientists Research Awards Fund [BS2013CL003]
- Fundamental Research Funds for the Central Universities [HIT. ICRST.2010009]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF.2011109, HIT.NSRIF.2010121]
- Scientific Research Foundation of Harbin Institute of Technology at Weihai [HIT(WH)X201108]
Herein, we report a facile process to massively synthesize three-dimensional (3D) boron and nitrogen co-doped carbon@Fe2O3/Fe3C/Fe nanoparticle decorated carbon nanotubes (B/N co-doped C@Fe2O3/Fe3C/Fe-CNTs). The fabrication involved a simple one-step chemical vapor deposition process. These as-synthesized 3D B/N co-doped C@Fe2O3/Fe3C/Fe-CNTs based absorbers exhibited excellent microwave absorption properties with tunable strong absorption wavebands in the frequency range of 2-18 GHz. A minimum reflection loss (RL) value of -42.6 dB was observed at 6.88 GHz with absorber thickness of 3.5 mm. Moreover, the absorption bandwidth for RL less than -10 dB was as large as 4.14 GHz when the absorber thickness dropped to 2.0 mm. A possible absorption mechanism was proposed in detail, which can be attributed to the synergy of the impedance matching and enhancement of multiple reflection among 3D B/N co-doped C@Fe2O3/Fe3C/Fe nanoparticles. (C) 2017 Elsevier Ltd. All rights reserved.
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