scholarly journals Tailoring conductive network nanostructures of ZIF-derived cobalt-decorated N-doped graphene/carbon nanotubes for microwave absorption applications

2021 ◽  
Vol 591 ◽  
pp. 463-473
Author(s):  
Kaifeng Wang ◽  
Shunzhe Zhang ◽  
Wenshuang Chu ◽  
Hua Li ◽  
Yujie Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Conductive Network ◽  
Doped Graphene

scholarly journals Nanostructured Barium Titanate/Carbon Nanotubes Incorporated Polyaniline as Synergistic Electromagnetic Wave Absorbers

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Lujun Yu ◽  
Yaofeng Zhu ◽  
Chen Qian ◽  
Qiang Fu ◽  
Yongzhen Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Wave ◽  
Barium Titanate ◽  
Microwave Absorption ◽  
Reflection Loss ◽  
Network Structures ◽  
Conductive Network ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Absorption

The three-dimensional (3D) conductive network structures formed by barium titanate/carbon nanotubes incorporated polyaniline were favorable for strengthening electromagnetic absorption capability. Herein, an easy and flexible method consisting of sol-gel technique, in situ polymerization, and subsequent mechanical method have been developed to prepare the barium titanate/carbon nanotubes incorporated polyaniline (CNTs/BaTiO3/PANI or CBP) ternary composites. The dielectric properties and microwave absorption properties of CNTs/BaTiO3/PANI composites were investigated in the frequency range of 2–18 GHz by vector network analyzer. Interestingly, it is found that the CNTs/BaTiO3/PANI composites with 3D conductive network structures presented outstanding electromagnetic absorption properties, which may be attributed to the high impedance matching behavior and improved dielectric loss ability and novel synergistic effect. Additionally, it also can be supposed that the “geometrical effect” of composite was more beneficial to absorbing the incident electromagnetic wave. The CNTs/BaTiO3/PANI composite (the mass ratio of CNTs/BaTiO3to PANI is 2 : 3) exhibits the best microwave absorption properties, of which the minimum reflection loss value can reach −30.9 dB at 8 GHz and the absorption bandwidth with a reflection loss blew −10 dB ranges from 7.5 to 10.2 GHz.

Position Selective Dielectric Polarization Enhancement in CNTs Based Heterostructures for High-Efficient Microwave Absorbing

Nanoscale ◽  
2021 ◽  
Author(s):  
Haihua Hu ◽  
Yun Zheng ◽  
Kun Ren ◽  
Jieying Wang ◽  
Yanhui Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Dielectric Polarization ◽  
High Efficient ◽  
Microwave Absorbing

Constructing carbon nanotubes (CNTs) based on heterostructures have been proved to be an effective way to improve microwave absorption (MA) capability of the materials, regardless of the inner wall or...

scholarly journals Controllable permittivity in 3D Fe3O4/CNTs network for remarkable microwave absorption performances

RSC Advances ◽  
2017 ◽  
Vol 7 (43) ◽  
pp. 26801-26808 ◽  
Author(s):  
Lingyu Zhu ◽  
Xiaojun Zeng ◽  
Meng Chen ◽  
Ronghai Yu
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Effective Bandwidth ◽  
Three Dimension ◽  
Porous Spheres

Fe3O4 porous spheres are anchored onto carbon nanotubes (CNTs) to form three-dimension Fe3O4/CNTs nanocomposites, which exhibit remarkable EM microwave absorption performances with RL value of −51 dB at 5.52 GHz and effective bandwidth of 3.9 GHz.

Rationally designed hierarchical N-doped carbon nanotubes wrapping waxberry-like Ni@C microspheres for efficient microwave absorption

2021 ◽  
Author(s):  
Dawei Liu ◽  
Yunchen Du ◽  
Ping Xu ◽  
Fengyuan Wang ◽  
Yahui Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Composition ◽  
Microwave Absorption ◽  
Microstructure Design ◽  
Composition Modulation ◽  
Absorption Performance ◽  
Microwave Absorption Performance

The enhanced microwave absorption performance of composites benefits from simultaneous rational microstructure design and chemical composition modulation.

Carbon Nanotubes based composites for electromagnetic absorption- A review

2021 ◽  
Vol 01 ◽  
Author(s):  
Navdeep Singh ◽  
Gagan Deep Aul
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Cross Section ◽  
Radar Cross Section ◽  
Complex Permeability ◽  
Tangent Loss ◽  
Microwave Frequencies ◽  
Radar Absorbing Material ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

: Radar is a delicate detection device and since its evolution different techniques for reducing electromagnetic reflections have been discovered. This paper provide concise review on fundamentals of absorption which reduces radar cross section from stealth target with which radar cross section has effects to survivability and mission capability. The reduction of radar cross section depend on dielectric and magnetic properties of material. The first section reviews the Radar Absorbing Material (RAM) in order to provide a background on fundamentals, various stealth techniques for absorption and its properties at microwave frequencies. The second section reviews the Multi-Walled Carbon Nanotubes and its different composites by encapsulation of other metals, polymers or epoxies into it and its microwave absorption properties were studies at microwave frequencies. Multi-Walled Carbon Nanotubes based composites for microwave absorption are reviewed on the basis of various factors; material composition, reflection loss performance, thickness, complex permittivity, complex permeability, dielectric tangent loss, magnetic tangent loss, bandwidth, and frequency band.

Sign in / Sign up

Export Citation Format

Share Document