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Hierarchical ZnFe2O4@RGO@CuS composite: Strong absorption and wide-frequency absorption properties.
- Source :
-
Ceramics International . Jun2018, Vol. 44 Issue 8, p9816-9822. 7p. - Publication Year :
- 2018
-
Abstract
- In this work, hierarchical ZnFe 2 O 4 @RGO@CuS composite was synthesized by a simple two-step hydrothermal route, and its constitution, microstructures and microwave absorption properties were investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and vector network analyzer (VNA). Experimental results show that hierarchical ZnFe 2 O 4 @RGO@CuS composite exhibits an enhanced electromagnetic wave attenuation capacity, which is ascribed to the suitable impedance match, magnetic loss, dielectric loss and special hierarchical nanostructure. Importantly, the three-dimensional flower-like structure of CuS can produce more multiple reflection and scattering, leading to more consumption of electromagnetic wave energy. The maximum reflection loss of ZnFe 2 O 4 @RGO @CuS composite reaches −55.4 dB at 14.6 GHz and the effective absorption bandwidth (<−10 dB) is as wide as 7.5 GHz (from 10.5 to 18 GHz) for a thickness of only 2.2 mm. Hence, the as-prepared nanocomposite with strong absorption and wide frequency can be a promising absorber in decreasing EM wave interference. [ABSTRACT FROM AUTHOR]
- Subjects :
- *IRON
*ABSORPTION
*ZINC
*X-ray diffraction
*NANOSTRUCTURES
*CHEMICAL synthesis
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 44
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 130226817
- Full Text :
- https://doi.org/10.1016/j.ceramint.2018.02.220