Facile synthesis and excellent microwave absorption properties of FeCo-C core–shell nanoparticles

2018 ◽  
Vol 29 (8) ◽  
pp. 085604 ◽  
Author(s):  
Bingbing Liang ◽  
Shiliang Wang ◽  
Daitao Kuang ◽  
Lizhen Hou ◽  
Bowen Yu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Core Shell ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
Shell Nanoparticles ◽  
Microwave Absorption Properties ◽  
Core Shell Nanoparticles

Enhanced Microwave Absorption Properties of FeCo@TiO2 Core-Shell Nanoparticles

2018 ◽  
Vol 15 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Abdolrasoul Gharaati ◽  
Majid Ebrahimzadeh
Keyword(s):  
Tio2 Nanoparticles ◽  
Microwave Absorption ◽  
Core Shell ◽  
Frequency Range ◽  
Absorption Properties ◽  
Shell Nanoparticles ◽  
Microwave Absorption Properties ◽  
Band Frequency ◽  
Microwave Absorbing ◽  
Core Shell Nanoparticles

Background: Microwave absorbing nanocomposite is a kind of material that attenuates the reflection of microwave radiation in the gigahertz frequency range. These materials consist of dielectric and transition nanoparticles tend to exhibit attractive microwave absorption properties due to their high permittivity and permeability loss factors. Method: The FeCo nanoparticles were prepared from the reduction of iron and cobalt ions with hydrazine. Then, the FeCo@TiO2 core-shell nanoparticles synthesized by co-precipitation method and their microwave absorbing performance are investigated. The phase composition, morphology and coercivity properties of the nanoparticles were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The composites of FeCo@TiO2 nanoparticles with the ratio of 30 vol.% and paraffin wax (70 vol.%) in different thicknesses were prepared. The microwave absorption properties of these composites were investigated in the frequency range of 2-18 GHz using the vector network analyzer. Results: These nanocomposites exhibit the excellent microwave absorption characteristics (reflection loss<-20dB) in the bored band frequency range of 6-16 GHz with different absorber thicknesses of 1- 2.2 mm. The maximum absorption capability of -47.76 dB was obtained at the frequency of 7.92 GHz with the thickness of 1.8 mm. Based on this study, it can be argued that the FeCo@TiO2 nanoparticles can be used for the bored band and thin microwave absorbers.

scholarly journals Facile synthesis of NiS2@MoS2 core–shell nanospheres for effective enhancement in microwave absorption

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22454-22460 ◽  
Author(s):  
Xiao-Juan Zhang ◽  
Shan-Wen Wang ◽  
Guang-Sheng Wang ◽  
Zhen Li ◽  
Ao-Ping Guo ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Shell Structure ◽  
Core Shell ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Core Shell Structure

Core–shell structural NiS2@MoS2 nanospheres have been successfully fabricated and they possess enhanced microwave absorption properties as compared to single NiS2 nanospheres or MoS2 nanoplates due to this core–shell structure.

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

2015 ◽  
Vol 17 (8) ◽  
pp. 6044-6052 ◽  
Author(s):  
Biao Zhao ◽  
Gang Shao ◽  
Bingbing Fan ◽  
Wanyu Zhao ◽  
Rui Zhang
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
Core Shell ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Shell Composite

The microwave absorption properties of a core–shell rice-like CuO-coated Ni composite are superior to those of pure Ni microspheres and CuO nanoflakes. The optimal reflection loss is −62.2 dB at 13.8 GHz.

scholarly journals Facile synthesis of porous Fe3O4@C core/shell nanorod/graphene for improving microwave absorption properties

RSC Advances ◽  
2018 ◽  
Vol 8 (28) ◽  
pp. 15358-15365 ◽  
Author(s):  
Chen Fu ◽  
Dawei He ◽  
Yongsheng Wang ◽  
Xuan Zhao
Keyword(s):  
Microwave Absorption ◽  
Core Shell ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
One Pot ◽  
Microwave Absorption Properties ◽  
Reduced Graphene ◽  
Absorption Performance ◽  
Microwave Absorption Performance ◽  
Maximum Reflection Loss

Porous Fe3O4@C core/shell nanorods decorated with reduced graphene oxide were synthesized by a facile one-pot method, and exhibit high microwave absorption performance: maximum reflection loss reaches −48.6 dB.

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