Symmetrical polyhedron-bowl Co/CoO with hexagonal plate to forward electromagnetic wave absorption ability

CrystEngComm ◽  
2019 ◽  
Vol 21 (5) ◽  
pp. 816-826 ◽  
Author(s):  
Biao Zhao ◽  
Yang Li ◽  
Junwei Liu ◽  
Lei Fan ◽  
Ka Gao ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Hexagonal Plate

The symmetrical polyhedron-bowl structured Co/CoO displays enhanced microwave absorption properties.

ZnS nanowall coated Ni composites: facile preparation and enhanced electromagnetic wave absorption

RSC Advances ◽  
2014 ◽  
Vol 4 (105) ◽  
pp. 61219-61225 ◽  
Author(s):  
Biao Zhao ◽  
Gang Shao ◽  
Bingbing Fan ◽  
Wanyu Zhao ◽  
Yajun Xie ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Facile Preparation

The microwave absorption properties of ultrathin ZnS wall-coated Ni composites were superior to those of Ni microspheres and ZnS particles.

scholarly journals Preparation and Microwave Absorption Properties of CNTs/Fe3O4 Composite for Hyperthermia Applications

2011 ◽  
Vol 20 (3) ◽  
pp. 096369351102000
Author(s):  
Liu Aihong
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Hydrothermal Treatment ◽  
Treatment Method ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Tumor Hyperthermia

In this letter, the surface of carbon nanoutubes was successfully decorated by Fe3O4 via a simple and effective coprecipitation and hydrothermal treatment method. Then the resultant composite were characterized. The results showed that Fe3O4 nanoparticles in the surface of carbon nanotubes were uniform and universal; The composite was ferromagnetic and also had better absorbing properties in the 0-5GHz range. CNTs/Fe3O4 composite had significant potential for electromagnetic wave absorption application in tumor hyperthermia.

scholarly journals Electromagnetic wave absorption properties of ternary poly(vinylidene fluoride)/magnetite nanocomposites with carbon nanotubes and graphene

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 1919-1924 ◽  
Author(s):  
C. Tsonos ◽  
N. Soin ◽  
G. Tomara ◽  
B. Yang ◽  
G. C. Psarras ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Vinylidene Fluoride ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Poly Vinylidene Fluoride ◽  
Twin Screw

Ternary nanocomposite systems of PVDF/Fe3O4/CNT and PVDF/Fe3O4/GN, prepared with twin screw compounding method, exhibit enhanced microwave absorption properties.

Microwave Behavior of α-Fe/Fe3B/Y2O3 and ε-Fe3N/Y2O3 Resin Composites in GHz Range

2004 ◽  
Vol 449-452 ◽  
pp. 769-772 ◽  
Author(s):  
K. Machida ◽  
J.R. Liu ◽  
M. Itoh
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Resin Composites ◽  
Frequency Range ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Melt Spun

Nanocompositesα-Fe/Fe3B/Y2O3 and ε-Fe3N/Y2O3 were prepared by a melt-spun technique, and the subsequent hydrogenation, oxidation and nitrogenation treatments, respectively. The effective electromagnetic wave absorption (RL<-20 dB) was obtained in a frequency range of 2.7-6.5 GHz on resin composites of 80 wt% α-Fe/Fe3B/Y2O3 powders, with thickness of 6-3 mm; the ε-Fe3N/Y2O3 resin composites exhibited good microwave absorption properties in the 0.6-4.4 GHz range.

Preparation and Electromagnetic Wave Absorption Properties of Core-Shell Ni/TiO2 Microspheres

2014 ◽  
Vol 602-603 ◽  
pp. 762-766
Author(s):  
Biao Zhao ◽  
Bing Bing Fan ◽  
Hao Chen ◽  
Xiao Xuan Pian ◽  
Bin Bin Wang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Magnetic Loss ◽  
Core Shell ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
X Ray ◽  
Wave Absorption ◽  
Chloride Hexahydrate

The composite microspheres with Ni cores and amorphous TiO2 shells (Ni@TiO2) were synthesized by a one-pot solvothermal method at 180°C for 15 h, which used nickel chloride hexahydrate as Ni source andtetrabutyl orthotitanate as Ti source. The Ni/TiO2 core/shell composites were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX). A possible formation mechanism of core-shell Ni/TiO2 was proposed. Furthermore, the microwave absorption properties of these microspheres were investigated in terms of complex permittivity and permeability. The minimum reflection loss is-29.5 dB at 14.4 GHz for a layer of 4.0 mm thickness. Such phenomenon is attributed to the synergy effect between magnetic loss of Ni core and dielectric loss of amorphous TiO2 shell. The enhanced microwave absorption properties are also believed to be due to the unique coreshell structure. All results indicate that these Ni@TiO2 microspheres may be attractive candidate materials for electromagnetic wave absorption applications.

Preparation and electromagnetic wave absorption properties of novel dendrite-like NiCu alloy composite

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42587-42590 ◽  
Author(s):  
Biao Zhao ◽  
Gang Shao ◽  
Bingbing Fan ◽  
Wanyu Zhao ◽  
Rui Zhang
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
Wide Band ◽  
Strong Absorption ◽  
Alloy Composite ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Nicu Alloys

The dendrite-like NiCu alloys show outstanding microwave absorption properties with the features of thin-thickness, strong absorption and wide-band.

Excellent Microwave Absorption Behaviors of Polyaniline Composites Containing CeO2 Nanorods in the X-Band

NANO ◽  
2017 ◽  
Vol 12 (04) ◽  
pp. 1750047 ◽  
Author(s):  
Honglong Xing ◽  
Qing Yin ◽  
Zhenfeng Liu ◽  
Lei Wang
Keyword(s):  
Electron Microscopy ◽  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
In Situ Polymerization ◽  
Morphological Characteristics ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
X Band

Conductive polyaniline/CeO2 nanocomposite powders (PANI/CeO[Formula: see text] were prepared by an in situ polymerization method. The effects of CeO2 content on the microwave absorption properties of composites were investigated. The phase composition, morphological characteristics, electromagnetic parameters and microwave absorption properties of the composites were characterized through X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and vector network analysis. Results show that CeO2 nanorods are coated with PANI to form a well-defined hierarchical structure. CeO2 is well-incorporated into the PANI matrix. CeO2/PANI exhibits excellent microwave absorption properties at 2–18[Formula: see text]GHz. As the CeO2 content increases to 30[Formula: see text]wt.%, an optimal reflection loss (RL) of [Formula: see text]40[Formula: see text]dB (99.99% of electromagnetic wave absorption) is observed at 8.8[Formula: see text]GHz with a thickness of 3.0[Formula: see text]mm. The frequency bandwidth corresponding to 90% of electromagnetic wave absorption crosses the X-band. Therefore, PANI/CeO2 can be used as an advantageous candidate for a new type of microwave absorptive material.

scholarly journals Enhanced electromagnetic wave absorption property of binary ZnO/NiCo2O4 composites

2021 ◽  
Author(s):  
Bin Du ◽  
Mei Cai ◽  
Xuan Wang ◽  
Junjie Qian ◽  
Chao He ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Dielectric Properties ◽  
Hydrothermal Reaction ◽  
Absorption Property ◽  
Absorption Properties ◽  
Promising Candidate ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorbing Materials ◽  
Minimum Reflection Loss

AbstractNowadays, metal oxide-based electromagnetic wave absorbing materials have aroused widely attentions in the application of telecommunication and electronics due to their selectable mechanical and outstanding dielectric properties. Herein, the binary ZnO/NiCo2O4 nanoparticles were successfully synthesized via hydrothermal reaction and the electromagnetic wave absorption properties of the composites were investigated in detail. As a result, benefiting from the dielectric loss, the as-obtained ZnO/NiCo2O4-7 samples possessed a minimum reflection loss value of −33.49 dB at 18.0 GHz with the thickness of 4.99 mm. This work indicates that ZnO/NiCo2O4 composites have the promising candidate applications in electromagnetic wave absorption materials in the future.

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