Investigation of microwave absorption properties of multiwalled nanotube buckypaper filled with cobalt nanoparticles

2014 ◽  
Vol 18 (sup3) ◽  
pp. S3-7-S3-11
Author(s):  
J.-H. Liu ◽  
L. Saravanan ◽  
H.-Y. Miao ◽  
L.-C. Wang
Keyword(s):  
Microwave Absorption ◽  
Cobalt Nanoparticles ◽  
Absorption Properties ◽  
Microwave Absorption Properties

Synthesis, characterization, magnetic and microwave absorption properties of iron–cobalt nanoparticles and iron–cobalt @ polyaniline (FeCo@PANI) nanocomposites

2018 ◽  
Vol 29 (14) ◽  
pp. 12126-12134 ◽  
Author(s):  
Mehdi Rahimi-Nasrabadi ◽  
Mohammad Hosein Mokarian ◽  
Mohammad Reza Ganjali ◽  
Mohammad Almaci Kashi ◽  
Sima Alikhanzadeh Arani
Keyword(s):  
Microwave Absorption ◽  
Cobalt Nanoparticles ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Iron Cobalt

Preparation and Investigation of Co-Dispersed MWCNT Buckypaper for the Microwave Absorption

2013 ◽  
Vol 479-480 ◽  
pp. 20-24 ◽  
Author(s):  
Lakshmanan Saravanan ◽  
Jih Hsin Liu ◽  
Hsin Yuan Miao ◽  
Li Chih Wang
Keyword(s):  
Microwave Absorption ◽  
Cobalt Nanoparticles ◽  
Frequency Range ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Filtration Method ◽  
X Ray ◽  
Multi Walled Carbon Nanotube ◽  
Co Nanoparticles

The paper deals with the preparation of cobalt nanoparticles dispersed multi walled carbon nanotube buckypaper by the dispersion and filtration method to study the electromagnetic (microwave) absorption properties. From the X-ray diffraction the crystallite size of the cobalt nanoparticles of 33.04 nm was calculated. FESEM image clearly indicates the presence of cobalt nanoparticles in the buckypaper. Microwave-absorbing properties were investigated in terms of measuring the transmission coefficient (S21) with MWCNT-buckypaper as the absorber using microstrip line in a frequency range of 2–20 GHz. Compared to the pure buckypaper the absorption peak of the Co-CNT composites move to the lower frequency by dispersing the Co nanoparticles into the MWCNT-BP.

scholarly journals Magnetic Properties and Microwave Absorption Properties of Polymer-Protected Cobalt Nanoparticles

2002 ◽  
Vol 43 (3) ◽  
pp. 406-409 ◽  
Author(s):  
Yoshihiro Kato ◽  
Satoshi Sugimoto ◽  
Ken-ichi Shinohara ◽  
Nobuki Tezuka ◽  
Toshio Kagotani ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Microwave Absorption ◽  
Cobalt Nanoparticles ◽  
Absorption Properties ◽  
Microwave Absorption Properties

Microwave absorption properties of SiCN ceramics doped with cobalt nanoparticles

2020 ◽  
Vol 31 (5) ◽  
pp. 3803-3816 ◽  
Author(s):  
Shan Wang ◽  
Xiao Lin ◽  
M. Zeeshan Ashfaq ◽  
Xinfeng Zhang ◽  
Cuncai Zhao ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Cobalt Nanoparticles ◽  
Absorption Properties ◽  
Microwave Absorption Properties

Cobalt nanoparticles encapsulated in a nitrogen and oxygen dual-doped carbon matrix as high-performance microwave absorbers

2019 ◽  
Vol 6 (9) ◽  
pp. 2472-2480 ◽  
Author(s):  
Sifan Zeng ◽  
Mengyu Wang ◽  
Wanlin Feng ◽  
Lini Zhu ◽  
Zhen Teng ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Performance ◽  
Magnetic Loss ◽  
Carbon Matrix ◽  
Cobalt Nanoparticles ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbers ◽  
Loss Mechanisms

Co@NOC composites showed impressive microwave absorption properties owing to multiple dielectric and magnetic loss mechanisms.

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.

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