Hybrids of cobalt nanochains and polyvinylidene fluoride with enhanced microwave absorption performance

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55546-55551 ◽  
Author(s):  
Shu-Qing Lv ◽  
Ya-Fei Pan ◽  
Pei-Bo Yang ◽  
Guang-Sheng Wang
Keyword(s):  
Microwave Absorption ◽  
Polyvinylidene Fluoride ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Absorption Properties ◽  
Flexible Film ◽  
Absorption Performance ◽  
Wet Chemical ◽  
Microwave Absorption Performance

By using a simple wet chemical method and hot-molding procedure, a kind of flexible film with enhance absorption properties based on binary cobalt nanochains/polyvinylidene fluoride (PVDF) hybrids has been successfully fabricated.

Flexible nanocomposites with enhanced microwave absorption properties based on Fe3O4/SiO2 nanorods and polyvinylidene fluoride

2015 ◽  
Vol 3 (23) ◽  
pp. 12197-12204 ◽  
Author(s):  
Xiaofang Liu ◽  
Yaxin Chen ◽  
Xinrui Cui ◽  
Min Zeng ◽  
Ronghai Yu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Polyvinylidene Fluoride ◽  
Filler Content ◽  
Core Shell ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Performance ◽  
Pvdf Matrix ◽  
Microwave Absorption Performance

Flexible Fe3O4/SiO2/PVDF nanocomposites are prepared by embedding porous Fe3O4/SiO2 core/shell nanorods in polyvinylidene fluoride (PVDF) matrix. The nanocomposite with filler content of 40 wt% shows excellent microwave absorption performance over 2−18 GHz.

scholarly journals Effect of Reaction Time on Microwave Absorption Properties of Fe3O4 Hollow Spheres Synthesized via Ostwald Ripening

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2921 ◽  
Author(s):  
Wei Huang ◽  
Yujiang Wang ◽  
Shicheng Wei ◽  
Bo Wang ◽  
Yi Liang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Microwave Absorption ◽  
Ostwald Ripening ◽  
Impedance Matching ◽  
Hollow Spheres ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Magnetic Structures ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Hollow magnetic structures have great potential to be used in the microwave absorbing field. Herein, Fe3O4 hollow spheres with different levels of hollowness were synthesized by the hydrothermal method under Ostwald ripening effect. In addition to their microstructures, the microwave absorption properties of such spheres were investigated. The results show that the grain size and hollowness of Fe3O4 hollow spheres both increase as the reaction time increases. With increasing hollowness, the attenuation ability of electromagnetic wave of Fe3O4 spheres increases first and then decreases, finally increases sharply after the spheres break down. Samples with strong attenuation ability can achieve good impedance matching, which it does preferentially as the absorber thickness increases. Fe3O4 hollow spheres show the best microwave absorption performance when the reaction time is 24 h. The minimum reflection loss (RL (min)) can reach −40 dB, while the thickness is only 3.2 mm.

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.

scholarly journals Dual-functional SiOC ceramics coating modified carbon fibers with enhanced microwave absorption performance

RSC Advances ◽  
2019 ◽  
Vol 9 (53) ◽  
pp. 30685-30692 ◽  
Author(s):  
Sifan Zeng ◽  
Wanlin Feng ◽  
Shuyuan Peng ◽  
Zhen Teng ◽  
Chen Chen ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Carbon Fibers ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Dual Functional ◽  
Absorption Performance ◽  
Microwave Absorption Performance

The SiOC ceramics coating modified carbon fibers improved anti-oxidation and refine microwave absorption properties.

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.

γ-Fe2O3–MWNT/poly(p-phenylenebenzobisoxazole) composites with excellent microwave absorption performance and thermal stability

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6440-6447 ◽  
Author(s):  
Yi Chen ◽  
Xiaoyun Liu ◽  
Xiaoyang Mao ◽  
Qixin Zhuang ◽  
Zhong Xie ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Absorption Performance ◽  
Microwave Absorption Performance

A thermostable γ-Fe2O3–MWNTs/PBO composite with excellent absorption properties was obtained with a low content of magnetic fillers and a well defined structure.

Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites

RSC Advances ◽  
2016 ◽  
Vol 6 (77) ◽  
pp. 73020-73027 ◽  
Author(s):  
D. Li ◽  
Y. Feng ◽  
D. S. Pan ◽  
L. W. Jiang ◽  
Z. M. Dai ◽  
...  
Keyword(s):  
High Temperature ◽  
Microwave Absorption ◽  
Chemical Method ◽  
Arc Discharge ◽  
Complex Permeability ◽  
Discharge Process ◽  
High Temperature Solution ◽  
Temperature Solution ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Cactus-shaped core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanostructures with a spiky surface were prepared by combining an arc-discharge process with a high-temperature solution chemical method.

Urchin-Like Ni Microspherical Structure with Enhanced Magnetic Loss for Thin Microwave Absorber at Gigahertz

NANO ◽  
2017 ◽  
Vol 12 (03) ◽  
pp. 1750034 ◽  
Author(s):  
Yuping Sun ◽  
Zhengwu Pan ◽  
Hongming Long ◽  
Siu Wing Or ◽  
S. L. Ho ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Chemical Reduction ◽  
Magnetic Loss ◽  
Synthetic Strategy ◽  
High Anisotropy ◽  
Absorption Performance ◽  
Wet Chemical ◽  
5 Ghz ◽  
Microwave Absorption Performance ◽  
Absorption Measurements

We describe in this report a wet chemical reduction synthetic strategy for synthesizing urchin-like Ni microspherical structures, in which the nanowires self-assembled by Ni nanoparticles with the size of 5–20[Formula: see text]nm are assembled in a radial form from the center to the surface of the spherical oriented arrays. Urchin-like Ni microspherical structures exhibit the strong magnetic natural resonance peak at 7.0[Formula: see text]GHz and superior magnetic loss at 2–18[Formula: see text]GHz, originated from relatively high anisotropy energy of urchin-like shape. Electromagnetic absorption measurements show that the urchin-like Ni microspherical structures possess outstanding microwave absorption performance at 2–18[Formula: see text]GHz. An optimal reflection loss of [Formula: see text]21.98[Formula: see text]dB can be observed at 17.4[Formula: see text]GHz with a matching thickness of 1.4[Formula: see text]mm and the effective absorption (below −10 dB, 90% absorption) bandwidth is 5 GHz (12–17 GHz) with a thickness of 1.7[Formula: see text]mm. The excellent microwave absorption performance may be attributed to the good impedance, large attenuation constant and novel magnetic loss ability.

Size-dependent microwave absorption properties of Fe3O4 nanodiscs

RSC Advances ◽  
2016 ◽  
Vol 6 (30) ◽  
pp. 25444-25448 ◽  
Author(s):  
Yong Yang ◽  
Meng Li ◽  
Yuping Wu ◽  
Baoyu Zong ◽  
Jun Ding
Keyword(s):  
Microwave Absorption ◽  
High Quality ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Size Dependent ◽  
Absorption Performance ◽  
Microwave Absorption Performance

High quality Fe3O4 nanodiscs with different sizes are successfully synthesized and their size dependent microwave absorption performance are investigated.

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