Morphology-controlled synthesis and excellent microwave absorption performance of ZnCo2O4 nanostructures via a self-assembly process of flake units

Nanoscale ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 2694-2702 ◽  
Author(s):  
Xiao Li ◽  
Lei Wang ◽  
Wenbin You ◽  
Linshen Xing ◽  
Xuefeng Yu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Self Assembly ◽  
Effective Bandwidth ◽  
Controlled Synthesis ◽  
Assembly Process ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Cabbage-like ZnCo2O4 with abundant flakes possess a maximum RL value of −36.33 dB and the effective bandwidth of 5.11 GHz.

Air@rGO€Fe3O4 microspheres with spongy shells: self-assembly and microwave absorption performance

2016 ◽  
Vol 4 (44) ◽  
pp. 10518-10528 ◽  
Author(s):  
Qiang Zeng ◽  
Xu-hai Xiong ◽  
Ping Chen ◽  
Qi Yu ◽  
Qi Wang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Microwave Absorption ◽  
Self Assembly ◽  
Calcination Process ◽  
Emulsion Technique ◽  
Microwave Absorbing Properties ◽  
Absorption Performance ◽  
Microwave Absorbing ◽  
Fe3o4 Microspheres ◽  
Microwave Absorption Performance

Novel Air@rGO€Fe3O4 microspheres with excellent microwave absorbing properties and corrosion resistance were synthesized by a W/O emulsion technique followed by a calcination process.

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.

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