Journal
NPJ 2D MATERIALS AND APPLICATIONS
Volume 3, Issue -, Pages -Publisher
NATURE RESEARCH
DOI: 10.1038/s41699-019-0115-5
Keywords
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Funding
- Foundation of Lanzhou Institute of Chemical Physics
- National Natural Science Foundation of China [51875550, 51527901, 51872058, U1737213]
- Youth Innovation Promotion Association [2017459]
- Science and Technology Program of Gansu Province [18JR3RA380]
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Graphene has been regarded as a promising candidate in microwave absorption field but still faces some major challenges, including the limitation of mass production and poor impedance matching. Here, we demonstrate a simple approach to fabricate multilayer graphene in a kilo-mass/hour (>= 2.5 kg/h) scale through an oxidation-thermal expansion-air convection shearing process. The subsequent incorporation of hexagonal boron nitride nanoparticles (h-BNNPs) can effectively tailor the dielectric and magnetic properties of the as-obtained multilayer graphene, which can significantly boost its microwave absorption performance. The as-obtained multilayer graphene/h-BNNP hybrid with 40 wt.% of h-BNNPs, exhibits extremely low reflection loss value of -67.35 dB at 8.04 GHz when the absorber thickness is 3.29 mm, ranking it as one of the most attractive absorbers reported to date. Moreover, the multilayer graphene/h-BNNP hybrids possess low densities less than 0.45 g/cm(3), making them very attractive for practical microwave absorption application.
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