In situ synthesis of novel urchin-like ZnS/Ni<sub>3</sub>S<sub>2</sub>@Ni composite with a core–shell structure for efficient electromagnetic absorption

Zhao, Biao; Shao, Gang; Fan, Bingbing; Zhao, Wanyu; Zhang, Shihao; Guan, Keke; Zhang, Rui

doi:10.1039/c5tc02063h

Cited by 105 publications

(30 citation statements)

References 58 publications

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“…An excellent absorbing material should absorb more than 90% of EM waves, and its RL value is required to be less than −10 dB. Here, the RL can be calculated by several formulas [39,40]: where c, d, Z 0 , and Z in represent the velocity of light, thickness of the absorber, impedance of free space, and input impedance of the absorber in the air, respectively. Figure 7(a)-(f) presents the plots of RL versus thickness and frequency for ICF, 3D-ISF-I, and 3D-ISF-II.…”

Section: Electromagnetic Propertymentioning

confidence: 99%

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

Li¹,

Mao²,

He³

et al. 2020

Mater. Res. Express

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To design a lightweight and high-performance absorber, this work introduced a novel threedimensional interconnected SiC foam with double-layer hollow skeleton (3D-ISF), which was prepared by depositing SiC, pyrolytic carbon, and SiC layer on interconnected carbon foam, followed by oxidation of carbon. SEM results showed the interconnected hollow structure had been successfully synthesized, which was beneficial for microwave absorbing efficiency, and numerous columnar SiC defects were observed and played a critical role in the microwave absorption properties. The electromagnetic performances of 3D-ISF-I and 3D-ISF-II were investigated in depth. With the increase of thickness of SiC layer, 3D-ISF-II exhibited a better microwave absorption property, which could be ascribed to the higher impedance matching ratio (Z r ) and attenuation constant (α). The optimum reflection loss value of 3D-ISF-II could reach −45.649 dB while that of 3D-ISF-I was just −32.070 dB. There is no doubt that the prepared materials have tunable microwave absorbing properties, which can promote the development of SiC-based absorbing materials to a certain extent. Finally, it was confirmed that the Z r played a dominant role in 3D-ISF, which provided practical guidance for the design of porous materials.

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Section: Electromagnetic Propertymentioning

confidence: 99%

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

Li¹,

Mao²,

He³

et al. 2020

Mater. Res. Express

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“…The monodispersed Ni microspheres were prepared according to our previous literatures [37,45,62]. Synthesis of urchin-like core-shell structured ZnS/Ni 3 S 2 @Ni composite [61]: in brief, Ni (0.05 g) was dispersed in a mixture of aqueous solution of distilled water (30 mL) and ethanol (30 mL) containing 1.0 M NaOH. Then, 1 mmol ZnCl 2 and 2 mmol Na 2 S•9H 2 O were introduced into above mixture, respectively.…”

Section: Preparation Of Urchin-like Zns/ni 3 S 2 @Ni Compositesmentioning

confidence: 99%

“…XRD patterns of (a) pristine Ni microspheres and (b) as-prepared ZnS/Ni 3 S 2 @Ni[61] (permission from RSC).…”

mentioning

confidence: 99%

“…FESEM images of (a) Ni microspheres, (b, c) urchin-like core-shell structured ZnS/Ni 3 S 2 @Ni composite, and (d) EDS profile of ZnS/Ni 3 S 2 @Ni composite[61] (permission from RSC).…”

mentioning

confidence: 99%

“…The calculated RL of core-shell ZnS/Ni 3 S 2 @Ni composites prepared at various temperatures: (a) 60°C, (b) 80°C, (c) 100°C, and (d) 120°C with different thickness in the frequency range of 1-18 GHz[61] (permission from RSC).…”

mentioning

confidence: 99%

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Electromagnetic Wave Absorption Properties of Core-Shell Ni-Based Composites

Zhao¹,

Zhang²

2020

Electromagnetic Materials and Devices

Self Cite

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Currently, high efficiency electromagnetic wave absorption plays an important role to keep away from the detection of aircraft by radar and reduce information leakage in various electronic equipment. Among the candidates of electromagnetic absorbers, ferromagnetic Ni materials possess high saturation magnetization and high permeability at high frequency (1-18 GHz), which is widely used to prepare thinner absorbing materials along with strong electromagnetic absorption properties. However, the metallic materials usually have relatively high electrical conductivity, and their permeability decreases rapidly at high frequency thanks to the eddy current losses, which is generally named as skin-depth effect. To address this issue, one effective way is to design core-shell structured Ni based composites combining magnetic cores with dielectric shells. This chapter focuses on the state-of-the-art of the microwave absorption properties of Ni-based core-shell composites, and the related electromagnetic attenuation theory about how to enhance absorption properties is also discussed in detail.

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Electromagnetic Response and Energy Conversion for Functions and Devices in Low‐Dimensional Materials

Cao

Wang

Zhang

et al. 2019

Adv Funct Materials

671

220

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Low‐dimensional materials have been long sought after for their particular electromagnetic (EM) functions, with promising applications in EM wave absorbing and shielding, communicating and imaging, sensing and detecting, driving and actuating, etc. Herein, across the whole EM spectrum, low‐dimensional EM functional materials and devices are highly focused on. The crystal engineering and function‐guiding features addressed relate to crystal and electronic structures, EM responses and properties, energy conversion, as well as EM wave absorbing and shielding. Moreover, insight is given into this rapidly broadening field, the main challenges are proposed and future directions are predicted.

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In situ synthesis of novel urchin-like ZnS/Ni₃S₂@Ni composite with a core–shell structure for efficient electromagnetic absorption

Abstract: A core–shell ternary ZnS/Ni3S2@Ni composite exhibiting superior electromagnetic wave absorption properties was synthesized.

Cited by 105 publications

References 58 publications

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

Electromagnetic Wave Absorption Properties of Core-Shell Ni-Based Composites

Electromagnetic Response and Energy Conversion for Functions and Devices in Low‐Dimensional Materials

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In situ synthesis of novel urchin-like ZnS/Ni3S2@Ni composite with a core–shell structure for efficient electromagnetic absorption

Abstract: A core–shell ternary ZnS/Ni3S2@Ni composite exhibiting superior electromagnetic wave absorption properties was synthesized.

Cited by 105 publications

References 58 publications

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

Effect of SiC layer on microwave absorption properties of novel three-dimensional interconnected SiC foam with double-layer hollow skeleton

Electromagnetic Wave Absorption Properties of Core-Shell Ni-Based Composites

Electromagnetic Response and Energy Conversion for Functions and Devices in Low‐Dimensional Materials

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Product

Resources

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In situ synthesis of novel urchin-like ZnS/Ni₃S₂@Ni composite with a core–shell structure for efficient electromagnetic absorption