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.

Preparation and Microwave Absorption Properties of LiZn Ferrite

2009 ◽  
Vol 25 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Hong JIANG ◽  
Jia GUO ◽  
Lu ZHAO ◽  
Hong ZHU
Keyword(s):  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties

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.

Microwave absorption properties of core double-shell FeCo/C/BaTiO3nanocomposites

Nanoscale ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 3967-3971 ◽  
Author(s):  
Jingjing Jiang ◽  
Da Li ◽  
Dianyu Geng ◽  
Jing An ◽  
Jun He ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties

Improved mechanical and microwave absorption properties of SiCf/SiC composites with SiO2 filler

2021 ◽  
Vol 47 (10) ◽  
pp. 14455-14463 ◽  
Author(s):  
Zhaowen Ren ◽  
Wancheng Zhou ◽  
Yuchang Qing ◽  
Shichang Duan ◽  
Haijun Pan ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Sic Composites
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