Enhanced microwave absorption properties of graphite nanoflakes by coating hexagonal boron nitride nanocrystals

Handle URI:
http://hdl.handle.net/10754/623762
Title:
Enhanced microwave absorption properties of graphite nanoflakes by coating hexagonal boron nitride nanocrystals
Authors:
Zhong, Bo; Liu, Wei; Yu, Yuanlie ( 0000-0002-3895-6222 ) ; Xia, Long; Zhang, Jiulin; Chai, Zhenfei; Wen, Guangwu
Abstract:
We report herein the synthesis of a novel hexagonal boron nitride nanocrystal/graphite nanoflake (h-BNNC/GNF) composite through a wet-chemistry coating of graphite nanoflakes and subsequent in-situ thermal treatment process. The characterization results of X-ray diffraction, scanning electron microscope, transmission electron microscope, energy dispersive X-ray spectrum, and X-ray photoelectron spectroscopy demonstrate that h-BNNCs with diameter of tens of nanometers are highly crystallized and anchored on the surfaces of graphite nanoflakes without obvious aggregation. The minimum reflection loss (RL) value of the h-BNNC/GNF based absorbers could reach −32.38dB (>99.99% attenuation) with the absorber thickness of 2.0mm. This result is superior to the other graphite based and some dielectric loss microwave absorption materials recently reported. Moreover, the frequency range where the RL is less than −10dB is 3.49-17.28GHz with the corresponding thickness of 5.0 to 1.5mm. This reveals a better electromagnetic microwave absorption performance of h-BNNC/GNFs from the X-band to the Ku-band. The remarkable enhancement of the electromagnetic microwave absorption properties of h-BNNC/GNFs can be assigned to the increase of multiple scattering, interface polarization as well as the improvement of the electromagnetic impedance matching of graphite nanoflakes after being coated with h-BNNCs.
KAUST Department:
Advanced Membranes and Porous Materials Research Center
Citation:
Zhong B, Liu W, Yu Y, Xia L, Zhang J, et al. (2017) Enhanced microwave absorption properties of graphite nanoflakes by coating hexagonal boron nitride nanocrystals. Applied Surface Science. Available: http://dx.doi.org/10.1016/j.apsusc.2017.05.232.
Publisher:
Elsevier BV
Journal:
Applied Surface Science
Issue Date:
31-May-2017
DOI:
10.1016/j.apsusc.2017.05.232
Type:
Article
ISSN:
0169-4332
Sponsors:
This work was supported by the National Natural Science Foundation of China (51102060, 51172050, 51302049, 51372052 and 51672059), the Postdoctoral Science Foundation of China (2013M531036), and Shandong Province Young and Middle-Aged Scientists Research Awards Fund (BS2013CL003).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0169433217316094
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorZhong, Boen
dc.contributor.authorLiu, Weien
dc.contributor.authorYu, Yuanlieen
dc.contributor.authorXia, Longen
dc.contributor.authorZhang, Jiulinen
dc.contributor.authorChai, Zhenfeien
dc.contributor.authorWen, Guangwuen
dc.date.accessioned2017-05-31T10:09:30Z-
dc.date.available2017-05-31T10:09:30Z-
dc.date.issued2017-05-31en
dc.identifier.citationZhong B, Liu W, Yu Y, Xia L, Zhang J, et al. (2017) Enhanced microwave absorption properties of graphite nanoflakes by coating hexagonal boron nitride nanocrystals. Applied Surface Science. Available: http://dx.doi.org/10.1016/j.apsusc.2017.05.232.en
dc.identifier.issn0169-4332en
dc.identifier.doi10.1016/j.apsusc.2017.05.232en
dc.identifier.urihttp://hdl.handle.net/10754/623762-
dc.description.abstractWe report herein the synthesis of a novel hexagonal boron nitride nanocrystal/graphite nanoflake (h-BNNC/GNF) composite through a wet-chemistry coating of graphite nanoflakes and subsequent in-situ thermal treatment process. The characterization results of X-ray diffraction, scanning electron microscope, transmission electron microscope, energy dispersive X-ray spectrum, and X-ray photoelectron spectroscopy demonstrate that h-BNNCs with diameter of tens of nanometers are highly crystallized and anchored on the surfaces of graphite nanoflakes without obvious aggregation. The minimum reflection loss (RL) value of the h-BNNC/GNF based absorbers could reach −32.38dB (>99.99% attenuation) with the absorber thickness of 2.0mm. This result is superior to the other graphite based and some dielectric loss microwave absorption materials recently reported. Moreover, the frequency range where the RL is less than −10dB is 3.49-17.28GHz with the corresponding thickness of 5.0 to 1.5mm. This reveals a better electromagnetic microwave absorption performance of h-BNNC/GNFs from the X-band to the Ku-band. The remarkable enhancement of the electromagnetic microwave absorption properties of h-BNNC/GNFs can be assigned to the increase of multiple scattering, interface polarization as well as the improvement of the electromagnetic impedance matching of graphite nanoflakes after being coated with h-BNNCs.en
dc.description.sponsorshipThis work was supported by the National Natural Science Foundation of China (51102060, 51172050, 51302049, 51372052 and 51672059), the Postdoctoral Science Foundation of China (2013M531036), and Shandong Province Young and Middle-Aged Scientists Research Awards Fund (BS2013CL003).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0169433217316094en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Applied Surface Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Surface Science, 29 May 2017. DOI: 10.1016/j.apsusc.2017.05.232. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjecthexagonal boron nitride nanocrystalsen
dc.subjectgraphite nanoflakesen
dc.subjectcompositeen
dc.subjectelectromagnetic microwaveen
dc.subjectabsorption propertyen
dc.titleEnhanced microwave absorption properties of graphite nanoflakes by coating hexagonal boron nitride nanocrystalsen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.identifier.journalApplied Surface Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai, 264209, People’s Republic of Chinaen
dc.contributor.institutionSchool of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, People’s Republic of Chinaen
kaust.authorYu, Yuanlieen
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