BCN ceramics with excellent electromagnetic wave–absorbing property derived from high‐yield and soluble precursor polymers

2020 ◽  
Vol 34 (12) ◽  
Author(s):  
Shuai Zhang ◽  
Xin Long ◽  
Xiaoyu Ji ◽  
Changwei Shao
Keyword(s):  
Electromagnetic Wave ◽  
High Yield ◽  
Precursor Polymers ◽  
Absorbing Property

Graphene–carbonyl iron cross-linked composites with excellent electromagnetic wave absorption properties

2014 ◽  
Vol 2 (32) ◽  
pp. 6582-6591 ◽  
Author(s):  
Zetao Zhu ◽  
Xin Sun ◽  
Hairong Xue ◽  
Hu Guo ◽  
Xiaoli Fan ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Carbonyl Iron ◽  
Framework Structure ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
The Cross ◽  
Absorbing Property

A carbon-bridge effect was adopted to explain the electromagnetic wave absorbing property related to the cross-linked framework structure of RGO–SCI composites.

Poly(arylenebutadiynylene)s as high-yield carbonaceous precursor polymers

2001 ◽  
Vol 119 (1-3) ◽  
pp. 353-354 ◽  
Author(s):  
M. Kijima ◽  
H. Tanimoto ◽  
H. Shirakawa
Keyword(s):  
High Yield ◽  
Precursor Polymers

Facial Synthesis of Zn-Doped Fe3O4 with Enhanced Electromagnetic Wave Absorption Performance in S and C Bands

NANO ◽  
2016 ◽  
Vol 11 (08) ◽  
pp. 1650091 ◽  
Author(s):  
Zhenfeng Liu ◽  
Honglong Xing ◽  
Lei Wang ◽  
Dexin Tan ◽  
Ying Gan ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Doping Concentration ◽  
Magnetic Loss ◽  
Sodium Dodecyl ◽  
Peak Frequency ◽  
Quarter Wave ◽  
Absorbing Material ◽  
Absorption Performance ◽  
Absorbing Property ◽  
Coating Layer Thickness

In this study, Zn-doped Fe3O4 nanoparticles were successfully synthesized by a facile solvothermal method in the presence of sodium dodecyl sulfate (SDS). The morphology, magnetic properties and electromagnetic wave absorbing properties of these materials were characterized. Results showed that Zn[Formula: see text] played a significant role in the formation of Zn-doped Fe3O4. With the protection of SDS, highly dispersed Fe3O4 nanoparticles were obtained. The nanoparticle size decreased after Zn[Formula: see text] doping, and the dispersity deteriorated with increasing Zn[Formula: see text] doping concentration. Zn-doped Fe3O4 exhibited excellent electromagnetic wave absorbing property, which resulted in magnetic loss and dielectric loss at an appropriate doping concentration. The minimum reflection loss (RL) was approximately [Formula: see text][Formula: see text]dB at 16.9[Formula: see text]GHz. As the coating layer thickness increased to 4.0[Formula: see text]mm, the bandwidth was approximately 5.0[Formula: see text]GHz corresponding to RL below [Formula: see text][Formula: see text]dB, which nearly covered the entire S band (2–4[Formula: see text]GHz) and C band (4–8[Formula: see text]GHz). The peak frequency of RL and the number of peaks matched the quarter-wave thickness criteria. It was believed that the Zn-doped Fe3O4 could be a potential electromagnetic wave absorbing material in S and C bands.

Synthesis and Electromagnetic Wave Absorbing Property of BaTiO3@Fe Nanofibers with Core-Shell Structure

2016 ◽  
Vol 23 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Young-In Lee ◽  
◽  
Dae-Hwan Jang ◽  
Ki-Hoon Sung ◽  
Kyuman Lee ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure ◽  
Absorbing Property

Tunable Pearl Necklace Structured TiO2 Spheres on Carbon Nanotubes with Enhanced Electromagnetic Wave Absorption Performance

2020 ◽  
Vol 12 (10) ◽  
pp. 1433-1440
Author(s):  
Shengnan Li ◽  
Mu Zhang
Keyword(s):  
Electromagnetic Wave ◽  
Coating Thickness ◽  
Impedance Matching ◽  
Interfacial Polarization ◽  
Absorption Frequency ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Conduction Loss ◽  
Loading Ratio ◽  
Absorbing Property

Due to the low density and high conduction loss of carbonaceous materials, they have been considered as candidates for compositing electromagnetic wave absorbing materials. In this study, the well-designed CNT@TiO2 composites with pearl necklace structure were successfully synthesized via a facile hydrolyzation method. The absorption performances of CNT@TiO2 under different loading ratio were characterized and showed significantly different performance on the electromagnetic wave absorption. The reflection loss value reaches to –47.5 dB in the pearl necklace structured CNT@TiO2 composites obtained with a thickness of 1.6 mm at 11.2 GHz. An effective absorption bandwidth was found to reach to 4.2 GHz with a coating thickness of 1.4 mm. More, the absorption frequency range can be diverse by adjusting coating thickness. We deduce that promising electromagnetic wave absorbing property of the composites is related to the interfacial polarization induced by pearl necklace structure, improved impedance matching, conduction loss and scattering within the materials.

Application of manganese dioxide to electromagnetic wave absorber: effective permittivity and absorbing property

2006 ◽  
Vol 36 (3) ◽  
pp. 235-239 ◽  
Author(s):  
H. Guan ◽  
Y. Zhao ◽  
S. Liu ◽  
S. Lv
Keyword(s):  
Electromagnetic Wave ◽  
Manganese Dioxide ◽  
Effective Permittivity ◽  
Absorbing Property

Effect of iron-deposited graphene oxides on the electromagnetic wave absorbing property of polymer composite films with Fe-based hollow magnetic fibers for near-field applications

2016 ◽  
Vol 663 ◽  
pp. 196-203 ◽  
Author(s):  
Jin Woo Yi ◽  
Sang Bok Lee ◽  
Dong Gi Seong ◽  
Sang Kwan Lee ◽  
Ki Hyeon Kim ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Polymer Composite ◽  
Near Field ◽  
Composite Films ◽  
Graphene Oxides ◽  
Absorbing Property
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