Core/shell structured C/ZnO nanoparticles composites for effective electromagnetic wave absorption

RSC Advances ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 6467-6474 ◽  
Author(s):  
Meikang Han ◽  
Xiaowei Yin ◽  
Sa Ren ◽  
Wenyan Duan ◽  
Litong Zhang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Zno Nanoparticles ◽  
High Performance ◽  
Impedance Match ◽  
Core Shell ◽  
Effective Strategy ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Microwave Absorbing Materials ◽  
Absorbing Materials

Core/shell structured C/ZnO nanoparticles composite exhibits an effective strategy to design high-performance microwave absorbing materials with adjustable impedance match.

Electromagnetic absorption and thermoelastic analysis of a functionally graded wave absorber

2016 ◽  
Vol 12 (3) ◽  
pp. 534-542 ◽  
Author(s):  
Hongyan Tian ◽  
Jianbing Sang ◽  
Rihan Ao ◽  
Shujun Hou
Keyword(s):  
Electromagnetic Wave ◽  
Material Property ◽  
Mechanical Characteristics ◽  
Functionally Graded ◽  
Impedance Match ◽  
Gradual Change ◽  
Content Type ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorbing Materials

Purpose As a good absorbing material candidate, a functionally graded wave absorber can be tailored to satisfy the impedance match principle by gradually changing material property. The paper aims to discuss these issues. Design/methodology/approach The electromagnetic wave absorption properties are discussed. An analysis model is proposed to provide an insight into its mechanical characteristics during wave absorption. Considering the energy-converting and thermal deformation properties, the thermoelastic behaviors of an absorber are analyzed by numerical method. The effects of material and geometrical properties are discussed in detail. Findings The results demonstrate that absorbing effect of graded composite is enhanced. Good performance of low reflectance and high absorption with gentle thermal stress distribution can be obtained by proper designing of the gradient absorber. Originality/value Functionally graded materials exhibit a progressive compositional gradient change along certain dimension of structures, which can be used as absorbing materials for the gradual change of material property tailored to satisfy the principle of impedance match. The design of functionally graded absorbing materials usually should consider not only the electromagnetic performance, but also the mechanical properties simultaneously. Therefore, few investigations have addressed the mechanical characteristics of absorbers. This paper presents some studies on the electromagnetic, especially mechanical behaviors during electromagnetic wave absorption. It is helpful to provide mechanical reference for designing an absorber.

scholarly journals Enhanced electromagnetic wave absorption property of binary ZnO/NiCo2O4 composites

2021 ◽  
Author(s):  
Bin Du ◽  
Mei Cai ◽  
Xuan Wang ◽  
Junjie Qian ◽  
Chao He ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Dielectric Properties ◽  
Hydrothermal Reaction ◽  
Absorption Property ◽  
Absorption Properties ◽  
Promising Candidate ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorbing Materials ◽  
Minimum Reflection Loss

AbstractNowadays, metal oxide-based electromagnetic wave absorbing materials have aroused widely attentions in the application of telecommunication and electronics due to their selectable mechanical and outstanding dielectric properties. Herein, the binary ZnO/NiCo2O4 nanoparticles were successfully synthesized via hydrothermal reaction and the electromagnetic wave absorption properties of the composites were investigated in detail. As a result, benefiting from the dielectric loss, the as-obtained ZnO/NiCo2O4-7 samples possessed a minimum reflection loss value of −33.49 dB at 18.0 GHz with the thickness of 4.99 mm. This work indicates that ZnO/NiCo2O4 composites have the promising candidate applications in electromagnetic wave absorption materials in the future.

Magnetic carbon nanofibers containing uniformly dispersed Fe/Co/Ni nanoparticles as stable and high-performance electromagnetic wave absorbers

2014 ◽  
Vol 2 (40) ◽  
pp. 16905-16914 ◽  
Author(s):  
Jun Xiang ◽  
Jiale Li ◽  
Xionghui Zhang ◽  
Qin Ye ◽  
Jiahuan Xu ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Carbon Nanofibers ◽  
High Performance ◽  
Ni Nanoparticles ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Magnetic Carbon ◽  
Ku Band

Magnetic carbon nanofibers containing uniformly dispersed Fe/Co/Ni nanoparticles (CNF–M) exhibit excellent electromagnetic wave absorption properties from the C-band to the Ku-band.

Synthesis, magnetic and electromagnetic wave absorption properties of porous Fe3O4/Fe/SiO2 core/shell nanorods

2009 ◽  
Vol 106 (5) ◽  
pp. 054303 ◽  
Author(s):  
Y. J. Chen ◽  
P. Gao ◽  
C. L. Zhu ◽  
R. X. Wang ◽  
L. J. Wang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Core Shell ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption
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