Lightweight porous Co3O4 and Co/CoO nanofibers with tunable impedance match and configuration-dependent microwave absorption properties

CrystEngComm ◽  
2017 ◽  
Vol 19 (41) ◽  
pp. 6095-6106 ◽  
Author(s):  
Biao Zhao ◽  
Jiushuai Deng ◽  
Luyang Liang ◽  
Chenyinxia Zuo ◽  
Zhongyi Bai ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Impedance Match ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
One Dimensional ◽  
Tunable Impedance

In this study, we fabricated one-dimensional porous Co3O4 and Co/CoO nanofibers by calcination of cobalt(ii) oxalate dehydrate precursors in an environment filled with air and N2, respectively.

In situ synthesis of one-dimensional MWCNT/SiC porous nanocomposites with excellent microwave absorption properties

2011 ◽  
Vol 21 (35) ◽  
pp. 13581 ◽  
Author(s):  
Hui-Ling Zhu ◽  
Yu-Jun Bai ◽  
Rui Liu ◽  
Ning Lun ◽  
Yong-Xin Qi ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
In Situ Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
One Dimensional ◽  
Porous Nanocomposites

scholarly journals Excellent microwave absorption properties based on a composite of one dimensional Mo2C@C nanorods and a PVDF matrix

RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21243-21248 ◽  
Author(s):  
Chao-Qin Li ◽  
Xun Shen ◽  
Ruo-Cheng Ding ◽  
Guang-Sheng Wang
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
One Dimensional ◽  
Absorption Performance ◽  
Pvdf Matrix ◽  
Maximum Reflection Loss

A Mo2C@C/PVDF composite with excellent absorption performance has been synthesized. The results indicate that the maximum reflection loss can reach −39.0 dB, and the absorbing bandwidth is up to 3.1 GHz at a thickness of 2.0 mm.

Effect of Magnetic Orientation on the Microwave Absorption Properties for Planar-Anisotropy Ce2Fe17N3-δ Powders/Silicone Composite

2017 ◽  
Vol 898 ◽  
pp. 1638-1644
Author(s):  
Xi Sheng Gu ◽  
Guo Guo Tan ◽  
Shu Wen Chen ◽  
Qi Kui Man ◽  
Sheng Lei Che ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Performance ◽  
Initial Permeability ◽  
Impedance Match ◽  
Magnetic Orientation ◽  
Planar Anisotropy ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbing Properties ◽  
Orientation Method

The electromagnetic parameters of magnetic unoriented and oriented Ce2Fe17N3-δ powders/Silicone composite with 15 vol% were investigated in the 0.1–18 GHz range. It was found that the initial permeability increased from 2.78 to 3.6 as well as the optimal RL reached –61.3 dB with a thickness of 1.91 mm at 9.01 GHz for the composite after orientation. The microwave absorbing properties of oriented composite were greatly enhanced resulting from the perfect impedance match condition improved by rotational magnetic orientation. This novel rotational magnetic orientation method might provide a new way to design high performance microwave absorbers.

Microwave absorption properties of Polyaniline-Ta2O5 Composites

2011 ◽  
Vol 3 (5) ◽  
pp. 561-562
Author(s):  
Sharadatayi Patil ◽  
◽  
Sangshetty Kalyane
Keyword(s):  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties

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

Effect of Nd Substitution on Magnetic and Microwave Absorption Properties of Nanocrystalline Sr(MnSn)0.5Fe11O19

2014 ◽  
Vol 10 (3) ◽  
pp. 422-426
Author(s):  
Ali-Sharbati ◽  
Javad-Mola Verdi Khani ◽  
G.R. Amiri ◽  
R. Mousarezaei
Keyword(s):  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Nd Substitution

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
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