Hierarchical Three-Dimensional Cobalt Phosphate Microarchitectures: Large-Scale Solvothermal Synthesis, Characterization, and Magnetic and Microwave Absorption Properties

2008 ◽  
Vol 112 (41) ◽  
pp. 15948-15955 ◽  
Author(s):  
He Wen ◽  
Minhua Cao ◽  
Genban Sun ◽  
Wenguo Xu ◽  
Dan Wang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Solvothermal Synthesis ◽  
Large Scale ◽  
Three Dimensional ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Cobalt Phosphate

scholarly journals Fish bone-derived interconnected carbon nanofibers for efficient and lightweight microwave absorption

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Yangyang Gu ◽  
Peng Dai ◽  
Wen Zhang ◽  
Zhanwen Su
Keyword(s):  
Microwave Absorption ◽  
Carbon Nanofibers ◽  
Three Dimensional ◽  
Fish Bone ◽  
Absorption Properties ◽  
Simple Method ◽  
Microwave Absorption Properties ◽  
Absorption Performance ◽  
Microwave Absorption Performance ◽  
Better Than

AbstractIn this work, we demonstrated a simple method for preparing three-dimensional interconnected carbon nanofibers (ICNF) derived from fish bone as an efficient and lightweight microwave absorber. The as-obtained ICNF exhibits excellent microwave absorption performance with a maximum reflection loss of –59.2 dB at the filler content of 15 wt%. In addition, the effective absorption bandwidth can reach 4.96 GHz at the thickness of 2 mm. The outstanding microwave absorption properties can be mainly ascribed to its well-defined interconnected nanofibers architecture and the doping of nitrogen atoms, which are also better than most of the reported carbon-based absorbents. This work paves an attractive way for the design and fabrication of highly efficient and lightweight electromagnetic wave absorbers.

Large-Scale Synthesis and Microwave Absorption Properties of CoFe2O4/ Co0.4Zn0.6Fe2O4 Hollow Nanospheres

2015 ◽  
Vol 645-646 ◽  
pp. 126-131
Author(s):  
Qing Guo Ren ◽  
Xiao Jing Qiao ◽  
Yan Li ◽  
Zhi Gang Sun ◽  
Xiao Dang Guo ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
Large Scale ◽  
Average Diameter ◽  
Hollow Nanospheres ◽  
Magnetic Studies ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Line Theory ◽  
Glycol Solution

Monodisperse CoFe2O4and Co0.4Zn0.6Fe2O4hollow nanospheres were synthesized in large scale by solvothermal method in ethylene glycol solution. The structure, shape and size of the samples were investigated by Fourier Transform infrared, X-ray powder diffraction and scanning electron microscopy. The results indicate that the products are spherical with an average diameter less than 200 nm. Magnetic studies revealed that the saturation magnetization of Co0.4Zn0.6Fe2O4is 78.6 emu/g, higher than the CoFe2O4, which is 69 emu/g, while the coercivity of the Co0.4Zn0.6Fe2O4is 184 Oe , obviously lower than that of CoFe2O4which is 832 Oe. The electromagnetic parameters were measured at 2-18 GHz using HP8722ES vector network analyzer and then the microwave absorption properties were calculated through the transmission line theory. As to the Co0.4Zn0.6Fe2O4, the absorption bandwidth with reflection loss below-10 dB is up to 3GHz, from 10GHz to 13GHz with a thickness of 2 mm. A maximum reflection loss-45.6 dB was found at 12.9 GHz for the CoFe2O4with a thickness of 1.8 mm. As a result, the as-prepared hollow nanospheres show good prospects of being applied in EM wave absorption materials.

Facile synthesis of 3D flower-like Ni microspheres with enhanced microwave absorption properties

2018 ◽  
Vol 6 (36) ◽  
pp. 9615-9623 ◽  
Author(s):  
Dawei Liu ◽  
Yunchen Du ◽  
Zhennan Li ◽  
Yahui Wang ◽  
Ping Xu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Three Dimensional ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Three-dimensional flower-like Ni microspheres with enhanced microwave absorption performance can be easily synthesized through a simple precursor-directed method.

A novel three-dimensional Fe3SnC/C hybrid nanofiber absorber for lightweight and highly-efficient microwave absorption

2020 ◽  
Vol 22 (45) ◽  
pp. 26104-26108
Author(s):  
Guangguang Guan ◽  
Guojun Gao ◽  
Jun Xiang ◽  
Jingnan Yang ◽  
Xiaoqiang Li ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
Three Dimensional ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Highly Efficient ◽  
Hybrid Nanofibers ◽  
Hybrid Nanofiber

3D Fe3SnC/C hybrid nanofibers have superior microwave absorption properties. The optimal reflection loss reaches −119.2 dB at 17.1 GHz.

Lightweight three-dimensional Fe3O4/carbon micro-flowers with tunable microwave absorption properties

2019 ◽  
Vol 798 ◽  
pp. 414-423 ◽  
Author(s):  
Cuiping Li ◽  
Yaqing Ge ◽  
Xiaohui Jiang ◽  
Jing Sui ◽  
Zhiming Zhang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Three Dimensional ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Tunable Microwave

Solvothermal synthesis of CoxFe3−xO4 spheres and their microwave absorption properties

2014 ◽  
Vol 2 (29) ◽  
pp. 5944-5953 ◽  
Author(s):  
Renlong Ji ◽  
Chuanbao Cao ◽  
Zhuo Chen ◽  
Huazhang Zhai ◽  
Ju Bai
Keyword(s):  
Microwave Absorption ◽  
Calcination Temperature ◽  
Imaginary Part ◽  
Solvothermal Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
The Real ◽  
Octahedral Sites ◽  
Tetrahedral Sites

The number of ferrous and ferric pairs in adjacent octahedral sites determines the real part of permittivity. The cobalt ratio in mixed spinels determines the crystallinity or number of defects, and ultimately the imaginary part of permittivity. At a high synthesis or calcination temperature, some cobaltous and ferrous atoms migrate from octahedral to tetrahedral sites.

Solvothermal synthesis of flower-like CoS hollow microspheres with excellent microwave absorption properties

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 100392-100400 ◽  
Author(s):  
Tingyuan Huang ◽  
Man He ◽  
Yuming Zhou ◽  
Shiwei Li ◽  
Binbin Ding ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Hollow Spheres ◽  
Hollow Microspheres ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbers ◽  
Facile Solvothermal Method

In this study, flower-like CoS hollow spheres (CHSs), synthesized via a facile solvothermal method in the presence of CTAB, were initially investigated as microwave absorbers.

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