Co/C nanoparticles with low graphitization degree: a high performance microwave-absorbing material

2016 ◽  
Vol 4 (8) ◽  
pp. 1727-1735 ◽  
Author(s):  
Tong Liu ◽  
Xiubo Xie ◽  
Yu Pang ◽  
Satoru Kobayashi
Keyword(s):  
Carbon Source ◽  
Microwave Absorption ◽  
High Performance ◽  
Arc Plasma ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Plasma Method ◽  
Graphitization Degree ◽  
Absorbing Material ◽  
Microwave Absorbing

Co/C nanoparticles with low graphitization degree that have been prepared by an arc plasma method using methane as the carbon source exhibit high microwave absorption properties.

Development of Electroless Ni-P/NRAM Nanocomposite Powder with Enhanced Microwave Absorption Properties

2009 ◽  
Vol 67 ◽  
pp. 59-64 ◽  
Author(s):  
Rahul Sharma ◽  
Ramesh Chandra Agarwala ◽  
Vijaya Agarwala
Keyword(s):  
Electron Microscope ◽  
Microwave Absorption ◽  
Radiation Power ◽  
Nanocomposite Powder ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Radar Absorbing Material ◽  
Transmission Electron ◽  
Absorbing Material ◽  
Nanocomposite Powders

Nano radar absorbing material (NRAM) i.e. BaMe2Fe16O27 (Me2+=Fe2+) powder (10 nm) is coated with amorphous Ni-P nano layer (5-10 nm) by using electroless (EL) technology to develop EL Ni-P/NRAM nanocomposite powder. The experimental processes parameters and EL Ni-P bath composition were optimized to obtain the deposition. As-deposited nanocomposite powder was microwave annealed (MWA) with increasing radiation power from 160 to 760 watts for 5 minutes. The surface morphology, elemental contents, phase transformation and magnetic properties of NRAM powders were examined under field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) respectively. Maximum reflection loss (RL) 33.75 dB at 15.80 GHz for nanocomposite powder MWA at 760 watt was obtained the absorption range under −15 dB is from 13.76 to 16.77 GHz with 2 mm thickness layer in Ku Band. Excellent microwave absorption properties due to accurate electromagnetic (EM) match in the nanocomposite microstructure, a strong natural resonance and multipolarization. Such (Ni+ Ni3P)/NRAM nanocomposite powders may be attractive candidates for EM absorption.

Bimetallic MOF-derived porous CoNi/C nanocomposites with ultra-wide band microwave absorption properties

2019 ◽  
Vol 43 (42) ◽  
pp. 16546-16554 ◽  
Author(s):  
Chang Liu ◽  
Jing Qiao ◽  
Xue Zhang ◽  
Dongmei Xu ◽  
Nannan Wu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Fine Particles ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Target Product ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing ◽  
Distributed Elements

The CoNi bimetallic MOF-derived composites were synthesized in this work. The target product is composed of fine particles with uniformly distributed elements of Ni, Co, C. The CoNi/C-650 sample displays good microwave absorbing properties.

scholarly journals Controlling the electric permittivity of honeycomb-like core–shell Ni/CuSiO3 composite nanospheres to enhance microwave absorption properties

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 1172-1180 ◽  
Author(s):  
Rambabu Kuchi ◽  
Taha Latif ◽  
Sung Woo Lee ◽  
Viet Dongquoc ◽  
Phuoc Cao Van ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Impedance Matching ◽  
Core Shell ◽  
Electric Permittivity ◽  
Next Generation ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbing Materials ◽  
Absorbing Materials ◽  
Microwave Absorbing

Controlling impedance matching and enhancing absorption properties are crucial for developing next-generation microwave absorbing materials.

scholarly journals Bimetallic zeolitic imidazolate frameworks-derived porous carbon-based materials with efficient synergistic microwave absorption properties: the role of calcining temperature

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46436-46444 ◽  
Author(s):  
Suyun Wang ◽  
Xiang Ke ◽  
Suting Zhong ◽  
Yaru Lai ◽  
Danlin Qian ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Porous Carbon ◽  
Zeolitic Imidazolate Frameworks ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Graphitized Carbon ◽  
Microwave Absorbing ◽  
Carbon Based

The porous and graphitized carbon-based materials prepared by sacrificing template and in situ reduction show an excellent microwave absorbing performance.

EMI and microwave absorbing efficiency of polyaniline-functionalized reduced graphene oxide/γ-Fe2O3/epoxy nanocomposite

Soft Matter ◽  
2020 ◽  
Vol 16 (28) ◽  
pp. 6643-6653 ◽  
Author(s):  
Rimpa Jaiswal ◽  
Kavita Agarwal ◽  
Rakesh Kumar ◽  
Ritush Kumar ◽  
Kingsuk Mukhopadhyay ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Epoxy Nanocomposite ◽  
Reduced Graphene ◽  
Mixing Method ◽  
Microwave Absorbing

Polyaniline-decorated RGPF prepared by the solution mixing method in three different ratios (1 : 3, 1 : 1 and 3 : 1) of polyaniline-decorated reduced graphene oxide and ferrite have been studied for microwave absorption properties in defence application.

Microwave Absorption Properties of BaFe12O19 Prepared in Different Temperature with Polyaniline Nanocomposites

2017 ◽  
Vol 1142 ◽  
pp. 211-215 ◽  
Author(s):  
Wang Jun Feng ◽  
Xing Zhao ◽  
Wen Qian Zheng ◽  
Jun Tao Gang ◽  
Yue Cao ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
In Situ Polymerization ◽  
Sol Gel ◽  
Ftir Spectra ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Result Show ◽  
Absorbing Material

The BaFe12O19 nanoparticles was prepared by sol-gel method in different temperature (750°C,850°Cand 950°C), and then BaFe12O19/polyaniline nanocomposites was synthesized by in situ polymerization. The XRD, FTIR spectra, SEM and vector network analyzer were used to analyze the "" chemical component, morphology and microwave absorption property of the nanocomposites. The result show that BaFe12O19 can be generated at 750°C without any impurity ,and its size increased with increase of calcination temperature.BaFe12O19 nanoparticle was coated with polyaniline partially, and we can get it have interaction with polyaniline through FTIR spectra. While the ferrite calcined at 850°C,the thickness of the absorbing material is 4.5mm,the nanocomposites have the largest reflection loss of-17.6 dB at 6 GHz,and its reflection loss values less than−10 dB in the range of 5-7.4GHz.

Bio-inspired fabrication of hierarchical Ni–Fe–P coated skin collagen fibers for high-performance microwave absorption

2015 ◽  
Vol 17 (3) ◽  
pp. 2113-2120 ◽  
Author(s):  
Xiaoling Wang ◽  
Xuepin Liao ◽  
Wenhua Zhang ◽  
Bi Shi
Keyword(s):  
Microwave Absorption ◽  
High Performance ◽  
Collagen Fiber ◽  
Collagen Fibers ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Skin Collagen

Skin collagen fiber (CF) was employed for the bio-inspired fabrication of high-performance microwave absorption materials. To enhance the microwave absorption properties of CF, the well defined hierarchical 3D fibrous CF structure was covered with a Ni–Fe–P coating.

High-performance microwave absorption of flexible nanocomposites based on flower-like Co superstructures and polyvinylidene fluoride

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 55468-55473 ◽  
Author(s):  
Xiao-Juan Zhang ◽  
Guo-Cheng Lv ◽  
Guang-Sheng Wang ◽  
Tian-Yu Bai ◽  
Jia-Kang Qu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Polyvinylidene Fluoride ◽  
High Performance ◽  
Absorption Properties ◽  
Microwave Absorption Properties

In this research, the flexible Co/PVDF nanocomposites with excellent microwave absorption properties were firstly prepared.

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