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.

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.

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.

Construction and Microwave Absorption Properties of Core@Double-Shell Structured Fe3O4@Polyaniline@MnO2 Nanospheres

NANO ◽  
2020 ◽  
Vol 15 (03) ◽  
pp. 2050032 ◽  
Author(s):  
Wentong Yang ◽  
Xiansen Yang ◽  
Xiang Li ◽  
Md. Zahidul Islam ◽  
Yubing Dong ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
In Situ Polymerization ◽  
Impedance Matching ◽  
Multiple Reflections ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
The Core ◽  
Absorption Performance ◽  
Minimum Reflection Loss

In this paper, we designed a core@double-shell nanostructure to enhance the electromagnetic wave absorption performance of hybrid nanospheres. Herein, the core@double-shell structured Fe3O4@polyaniline@MnO2 nanospheres were successfully prepared by a facile solvothermal process and in situ polymerization methods. The morphology, structure, magnetism and microwave absorption properties were studied. The results reveal that the FPM nanospheres exhibit extraordinary microwave absorbing performance compared to those of either Fe3O4 or Fe3O4@polyaniline nanospheres. The minimum reflection loss of the FPM nanospheres is [Formula: see text]14.7[Formula: see text]dB at 15.76[Formula: see text]GHz with the thickness of 3.5[Formula: see text]mm, and the corresponding effective absorption bandwidth can reach 4.75[Formula: see text]GHz. The perfect EMW absorption of nanospheres can be ascribed to multi-interface polarization, multiple reflections and good impedance matching originated from the core@double-shell nanostructure.

Metal–semiconductor Zn/ZnO core–shell nanocables: facile and large-scale fabrication, growth mechanism, oxidation behavior, and microwave absorption performance

CrystEngComm ◽  
2015 ◽  
Vol 17 (14) ◽  
pp. 2806-2814 ◽  
Author(s):  
Bo Zhong ◽  
Xiaohui Tang ◽  
Xiaoxiao Huang ◽  
Long Xia ◽  
Xiaodong Zhang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Formation Mechanism ◽  
Growth Mechanism ◽  
Large Scale ◽  
Oxidation Behavior ◽  
Core Shell ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Zn/ZnO core–shell nanocables have been fabricated on a large scale and the formation mechanism and microwave absorption properties have been investigated.

scholarly journals Facile synthesis of porous Fe3O4@C core/shell nanorod/graphene for improving microwave absorption properties

RSC Advances ◽  
2018 ◽  
Vol 8 (28) ◽  
pp. 15358-15365 ◽  
Author(s):  
Chen Fu ◽  
Dawei He ◽  
Yongsheng Wang ◽  
Xuan Zhao
Keyword(s):  
Microwave Absorption ◽  
Core Shell ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
One Pot ◽  
Microwave Absorption Properties ◽  
Reduced Graphene ◽  
Absorption Performance ◽  
Microwave Absorption Performance ◽  
Maximum Reflection Loss

Porous Fe3O4@C core/shell nanorods decorated with reduced graphene oxide were synthesized by a facile one-pot method, and exhibit high microwave absorption performance: maximum reflection loss reaches −48.6 dB.

scholarly journals Excellent microwave absorption properties by tuned electromagnetic parameters in polyaniline-coated Ba0.9La0.1Fe11.9Ni0.1O19/reduced graphene oxide nanocomposites

RSC Advances ◽  
2017 ◽  
Vol 7 (58) ◽  
pp. 36433-36443 ◽  
Author(s):  
Juhua Luo ◽  
Yue Zuo ◽  
Pan Shen ◽  
Zhu Yan ◽  
Kang Zhang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Reflection Loss ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Reduced Graphene ◽  
Absorption Performance ◽  
Microwave Absorption Performance ◽  
Minimum Reflection Loss

The obvious enhancement of microwave absorption performance of Ba0.9La0.1Fe11.9Ni0.1O19/reduced graphene oxide/polyaniline ternary nanocomposites in 2–18 GHz was observed. The minimum reflection loss can reach −49.1 dB with thickness of 1.9 mm.

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.

Sign in / Sign up

Export Citation Format

Share Document