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dc.contributor.authorZhong, Bo
dc.contributor.authorLiu, Wei
dc.contributor.authorYu, Yuanlie
dc.contributor.authorXia, Long
dc.contributor.authorZhang, Jiulin
dc.contributor.authorChai, Zhenfei
dc.contributor.authorWen, Guangwu
dc.date.accessioned2017-05-31T10:09:30Z
dc.date.available2017-05-31T10:09:30Z
dc.date.issued2017-05-31
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.
dc.identifier.issn0169-4332
dc.identifier.doi10.1016/j.apsusc.2017.05.232
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.
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).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0169433217316094
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/
dc.subjecthexagonal boron nitride nanocrystals
dc.subjectgraphite nanoflakes
dc.subjectcomposite
dc.subjectelectromagnetic microwave
dc.subjectabsorption property
dc.titleEnhanced microwave absorption properties of graphite nanoflakes by coating hexagonal boron nitride nanocrystals
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.identifier.journalApplied Surface Science
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai, 264209, People’s Republic of China
dc.contributor.institutionSchool of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, People’s Republic of China
kaust.personYu, Yuanlie
refterms.dateFOA2019-05-29T00:00:00Z
dc.date.published-online2017-05-31
dc.date.published-print2017-10


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