Design and microwave absorption properties of thistle-like CoNi enveloped in dielectric Ag decorated graphene composites.
J Colloid Interface Sci
; 534: 110-121, 2019 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-30216831
ABSTRACT
A novel hierarchical composites for coupling thistle-like CoNi with dielectric Ag decorated graphene in paraffin wax as high performance microwave absorber has been synthesized by a facile two-step strategy. The components, particle size, microstructure and morphology of the resulting composites are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectra, scanning electron microscope, transmission electron microscopy and energy dispersive X-ray spectroscopy, etc. Due to the unique flower structure and good synergistic effect of dielectric loss and magnetic loss, thistle-like CoNi@dielectric Ag decorated graphene composites have showed glorious microwave absorption intensity and frequency width. The maximum reflection loss of -61.9â¯dB can be gained at 6.96â¯GHz, which has rarely been reported yet. In addition, the corresponding effective bandwidth with reflection loss less than -10â¯dB is 5.6â¯GHz ranging from 12.4 to 18â¯GHz at only 1.67â¯mm thickness. This highly efficient and broad band features endow thistle-like CoNi@dielectric Ag decorated graphene composites with promising applications in microwave absorption, electromagnetic shielding, information safety, direct broadcast satellite and military radar fields.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2019
Tipo de documento:
Article