RGO/BaFe12O19/Fe3O4 nanocomposite as microwave absorbent with lamellar structures and improved polarization interfaces

Journal Article · Sat Dec 15 00:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.08.014· OSTI ID:22805330

Jiao, Shangqing; Wu, Mingzai; Yu, Xinxin; Hu, Haibo; Bai, Zhiman; Dai, Peng; Jiang, Tongtong ^[1]; Bi, Hong ^[2]; Li, Guang ^[1]

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1. School of Physics and Materials Science, Anhui University, Hefei, 230601 (China)
2. School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601 (China)

Highlights: • RGO/BaFe{sub 12}O{sub 19}/Fe{sub 3}O{sub 4} nanocomposite are prepared via a two-step solvothermal method. • The maximum reflection loss can reach −46.04 dB, and the effective absorption bandwidth under −10 dB is 5.68 GHz. • Interfacial polarization as one of the mechanism for the enhanced absorption properties was detailedly analyzed. - Abstract: In this paper, we designed and prepared a composite of BaFe{sub 12}O{sub 19} (BFO) flakes, two-dimensional graphene and Fe{sub 3}O{sub 4} nanoparticles using a two-step solvothermal method. The combination of BFO flakes and two-dimensional graphene could effectively enhance the heterointerface and is believed to be favorable to enhance the interface polarization. The introduction of inverse spinel Fe{sub 3}O{sub 4} as the third phase could increase the saturated magnetization. The phase structure, morphology, magnetic properties and electromagnetic wave absorption performance of the as-prepared samples were characterized. Due to the enhanced interfacial polarization between the BaFe{sub 12}O{sub 19} flakes and graphene, the composite of RGO/BaFe{sub 12}O{sub 19}/Fe{sub 3}O{sub 4} exhibits excellent microwave absorption properties. The maximum reflection loss can reach -46.04 dB at 15.6 GHz with a thickness of 1.8 mm, and the effective absorption bandwidth reaches 5.68 GHz (from 11.60 GHz to 17.28 GHz). It is believed that the RGO/BaFe{sub 12}O{sub 19}/Fe{sub 3}O{sub 4} composites can find potential application in the field of microwave absorption due to their excellent absorption properties.

• OSTI ID: 22805330
• Journal Information: Materials Research Bulletin, Vol. 108; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
BARIUM COMPOUNDS
COMPOSITE MATERIALS
FERRITES
GHZ RANGE
GRAPHENE
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MICROWAVE RADIATION
MORPHOLOGY
NANOCOMPOSITES
POLARIZATION
REFLECTION
SPINELS
THICKNESS
TWO-DIMENSIONAL SYSTEMS
X-RAY DIFFRACTION