Investigation on the electromagnetic wave absorption properties of Ni chains synthesized by a facile solvothermal method

Zhao, Biao; Fan, Bingbing; Shao, Gang; Wang, Binbin; Pian, Xiaoxuan; Li, Wen; Zhang, Rui

doi:10.1016/j.apsusc.2014.04.029

Cited by 75 publications

(32 citation statements)

References 38 publications

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“…[25][26][27][28][29] However, the high conductivity results in the rapid decrease in high frequency permeability due to eddy current losses induced by the electromagnetic wave. 30 Therefore, for the purpose of optimizing microwave absorption ability, an efficient strategy is to cover the magnetic Ni particles by an inorganic and nonmagnetic coating to create a core-shell microstructure.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Zhao

Shao

Fan

et al. 2015

Phys. Chem. Chem. Phys.

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A novel hierarchical heterostructure of Ni microspheres-CuO nano-rices was fabricated using a simple two-step process. The CuO rices were densely deposited on the surfaces of Ni microspheres. The phase purity, morphology, and structure of composite heterostructures are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). Different structured Ni-CuO composite heterostructures are also investigated by adjusting the volume ratio of the reactants. The core-shell rice-like CuO-coated Ni exhibits better antioxidation capability than pure Ni due to the presence of the barrier effect of the CuO shell, which is revealed by the thermogravimetric analysis (TGA). In comparison with pristine Ni microspheres and CuO nanoflakes, the Ni-CuO composites exhibit excellent microwave absorption properties. Moreover, the amount of CuO plays a vital role in the microwave attenuation of Ni-CuO composites. The Ni-CuO heterostructures prepared at 0.017 M Cu(2+) exhibit the best electromagnetic wave absorption capabilities. A minimum reflection loss reaches -62.2 dB (>99.9999% microwave absorption) at 13.8 GHz with the thickness of only 1.7 mm. The effective absorption (below -10 dB) bandwidth can be tuned between 6.4 GHz and 18.0 GHz by tuning the absorber thickness of 1.3-3.0 mm. Thus, the Ni-CuO composite possesses a fascinating microwave absorption performance as a novel absorbing material with strong absorption, wide-band gap and thin thickness.

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Section: Introductionmentioning

confidence: 99%

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Zhao

Shao

Fan

et al. 2015

Phys. Chem. Chem. Phys.

Self Cite

109

View full text Add to dashboard Cite

show abstract

“…2,[22][23][24] However, owing to its metallic nature, the eddy current generation seriously limits their applications at high frequency. 25 Therefore, in order to optimize microwave absorption performance, an effective way is to cover the magnetic Ni metallic particles by an inorganic and nonmagnetic coating to create a core-shell structure.…”

Section: Introductionmentioning

confidence: 99%

ZnS nanowall coated Ni composites: facile preparation and enhanced electromagnetic wave absorption

et al. 2014

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In this work, core-shell composites with Ni cores and ZnS nanowall shells have been successfully prepared by a hydrothermal deposition method. The crystal structures, microstructures and electromagnetic (EM) properties of the samples were investigated by X-ray diffraction, scanning electron microscopy, energy disperse X-ray spectrometry, transmission electron microscopy and a network analyser (2-18 GHz). In comparison with Ni and ZnS particles, the Ni/ZnS composites show the best microwave absorption properties. The optimal reflection loss is À25.78 dB at 14.24 GHz with the thickness of 2.7 mm. The reflection loss below À10 dB (90% microwave absorption) is 4.72 GHz) with only a thickness of 2.7 mm. The enhanced microwave absorption capabilities of Ni/ZnS composites were due to good electromagnetic impedance matching, interfacial relaxation and unique wall-like ZnS shells.

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“…7-9 30 The electromagnetic absorption properties are mainly correlated with the complex permittivity, complex permeability, electromagnetic wave impedance match as well as the microstructures. [11][12][13] However, Ni would induce eddy current effect by microwave in GHz range due to its high conductivity. [11][12][13] However, Ni would induce eddy current effect by microwave in GHz range due to its high conductivity.…”

Section: Introductionmentioning

confidence: 99%

Corrosive synthesis and enhanced electromagnetic absorption properties of hollow porous Ni/SnO₂ hybrids

et al. 2015

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In this study, novel porous hollow Ni/SnO2 hybrids were prepared by a facile and flexible two-step approach composed of solution reduction and subsequent reaction-induced acid corrosion. In our protocol, it can be found that the hydrothermal temperature exerts a vital influence on the phase crystal and morphology of Ni/SnO2 hybrids. Notably, the Ni microspheres might be completely corroded in the hydrothermal process at 220 °C. The complex permittivity and permeability of Ni/SnO2 hybrids-paraffin wax composite were measured based on a vector network analyzer in the frequency range of 1-18 GHz. Electromagnetic absorption properties of samples were evaluated by transmission line theory. Ni/SnO2 hybrid composites exhibit superior electromagnetic absorption properties in comparison with pristine Ni microspheres. The outstanding electromagnetic absorption performances can be observed for the hollow porous Ni/SnO2 hybrid prepared at 200 °C. The minimum reflection loss is -36.7 dB at 12.3 GHz, and the effective electromagnetic wave absorption band (RL < -10 dB, 90% microwave attenuation) was in the frequency range of 10.6-14.0 GHz with a thin thickness of 1.7 mm. Excellent electromagnetic absorption properties were assigned to the improved impedance match, more interfacial polarization and unique hollow porous structures, which can result in microwave multi-reflection and scattering. This novel hollow porous hybrid is an attractive candidate for new types of high performance electromagnetic wave-absorbing materials, which satisfies the current requirements of electromagnetic absorbing materials, which include wide-band absorption, high-efficiency absorption capability, thin thickness and light weight.

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Investigation on the electromagnetic wave absorption properties of Ni chains synthesized by a facile solvothermal method

Cited by 75 publications

References 38 publications

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

ZnS nanowall coated Ni composites: facile preparation and enhanced electromagnetic wave absorption

Corrosive synthesis and enhanced electromagnetic absorption properties of hollow porous Ni/SnO₂ hybrids

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Investigation on the electromagnetic wave absorption properties of Ni chains synthesized by a facile solvothermal method

Cited by 75 publications

References 38 publications

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

ZnS nanowall coated Ni composites: facile preparation and enhanced electromagnetic wave absorption

Corrosive synthesis and enhanced electromagnetic absorption properties of hollow porous Ni/SnO2 hybrids

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Product

Resources

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Corrosive synthesis and enhanced electromagnetic absorption properties of hollow porous Ni/SnO₂ hybrids