Preparation of Polyaniline@MoS2@Fe3O4 Nanowires with a Wide Band and Small Thickness toward Enhancement in Microwave Absorption

2018 ◽  
Vol 1 (10) ◽  
pp. 5865-5875 ◽  
Author(s):  
Weidong Zhang ◽  
Xue Zhang ◽  
Yuan Zheng ◽  
Chao Guo ◽  
Meiyu Yang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Wide Band ◽  
Small Thickness

Achieving wideband microwave absorption properties in PVDF nanocomposite foams with an ultra-low MWCNT content by introducing a microcellular structure

2020 ◽  
Vol 8 (1) ◽  
pp. 58-70 ◽  
Author(s):  
Biao Zhao ◽  
Jiushuai Deng ◽  
Chongxiang Zhao ◽  
Chongda Wang ◽  
Yu Guang Chen ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Efficiency ◽  
Wide Band ◽  
Light Weight ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Mwcnt Content ◽  
Small Thickness ◽  
Nanocomposite Foams ◽  
Band Absorption

PVDF nanocomposite foams with ultra-low MWCNT content exhibit high-efficiency microwave absorption properties with a light weight, strong and wide-band absorption, and small-thickness properties.

Hierarchical porous Ni@boehmite/nickel aluminum oxide flakes with enhanced microwave absorption ability

2017 ◽  
Vol 19 (13) ◽  
pp. 9128-9136 ◽  
Author(s):  
Biao Zhao ◽  
Junwei Liu ◽  
Xiaoqin Guo ◽  
Wanyu Zhao ◽  
Luyang Liang ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Microwave Absorption ◽  
High Efficiency ◽  
Wide Band ◽  
Core Shell ◽  
Nickel Aluminum ◽  
Small Thickness ◽  
Hierarchical Porous

Hierarchical core–shell composites with porous cores and flaky shells show superior absorption which possess many features, such as lightweight, wide band, small thickness and high efficiency absorption.

Microwave wide band absorption by carbon from Corn cob-1

2016 ◽  
Vol 12 (2) ◽  
pp. 4204-4212 ◽  
Author(s):  
Maheshwar Sharon ◽  
Ritesh Vishwakarma ◽  
Abhijeet Rajendra Phatak ◽  
Golap Kalita ◽  
Nallin Sharma ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Agricultural Waste ◽  
Wide Band ◽  
Nickel Nitrate ◽  
Equivalent Amount ◽  
Frequency Range ◽  
Corn Cob ◽  
Different Temperatures ◽  
Band Absorption ◽  
5 Ghz

Corn cob, an agricultural waste, is paralyzed at different temperatures (700oC, 800oC and 900oC). Microwave absorption of carbon in the frequency range of 2 GHz to 8 GHz is reported. Carbon activated  with 5%  nickel nitrate showed more than 90% absorption of microwave in the frequency range from 6 GHz to 8 GHz, while carbon activated  with 10% Nickel nitrate treated corn cob showed 90% absorption  in the frequency range of 2.5 GHz to 5 GHz. Carbon showing the best absorption are characterized by XRD, Raman spectra and SEM . It is suggested that corn cob treatment   alone with KOH did not improve the microwave absorption, whereas treatment along with nickel nitrate improved the absorption property much better. It is proposed that treatment with nickel nitrate helps in creating suitable pores in carbon   which improved the absorption behavior because while treating carbon with 1N HCl helps to leach out nickel creating equivalent amount of pores in the carbon.

BaTiO3@C Core–Shell Nanoparticle/Paraffin Composites for Wide-Band Microwave Absorption

2021 ◽  
Author(s):  
Yujing Zhang ◽  
Yilin Zhang ◽  
Yuping Li ◽  
Minhao Yao ◽  
Xuefei Miao ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Wide Band ◽  
Core Shell

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 Investigation on electromagnetic characteristics, microwave absorption, thermal and mechanical properties of ferromagnetic cobalt–polystyrene composites in the X-band (8.4–12.4 GHz)

RSC Advances ◽  
2016 ◽  
Vol 6 (17) ◽  
pp. 13846-13857 ◽  
Author(s):  
Azizurrahaman Ansari ◽  
Mohammad Jaleel Akhtar
Keyword(s):  
Mechanical Properties ◽  
Microwave Absorption ◽  
Wide Band ◽  
Thermal And Mechanical Properties ◽  
Microwave Absorbers ◽  
X Band ◽  
Electromagnetic Characteristics ◽  
Ferromagnetic Cobalt

The electromagnetic, thermal and mechanical properties of ferromagnetic cobalt–polystyrene composites in the X-band (8.4–12.4 GHz) are investigated in order to explore their usage for wide band microwave absorbers.

scholarly journals A Facile Synthesis of Novel Amorphous TiO2 Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2141
Author(s):  
Hao Zhang ◽  
Yongpeng Zhao ◽  
Xuan Yang ◽  
Guolin Zhao ◽  
Dongmei Zhang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Hybrid Composites ◽  
Precursor Solution ◽  
Wide Band ◽  
Facile Synthesis ◽  
Highly Efficient ◽  
Amorphous Structures ◽  
One Step ◽  
Amorphous Tio2 ◽  
Matched Impedance

Amorphous structures may play important roles in achieving highly efficient microwave absorption performance due to the polarization losses induced by the disorders, vacancies and other functional groups existed in them. Herein, a kind of amorphous TiO2/rGO composite (a-TiO2/rGO) was successfully fabricated via a facile one-step solvothermal method. The complex permittivity of the composites can be regulated by adjusting the addition of precursor solution. The minimum reflection loss of a-TiO2/rGO composites reached −42.8 dB at 8.72 GHz with a thickness of 3.25 mm, and the widest efficient absorption bandwidth (EAB) was up to 6.2 GHz (11.8 to 18 GHz) with a thickness of only 2.15 mm, which achieved the full absorption in Ku band (12 to 18 GHz). Furthermore, the EAB was achieved ranging from 3.97 to 18 GHz by adjusting the thickness of the absorber, covering 87.7% of the whole radar frequency band. It is considered that the well-matched impedance, various polarization processes, capacitor-like structure and conductive networks all contributed to the excellent microwave absorption of a-TiO2/rGO. This study provides reference on constructing amorphous structures for future microwave absorber researches and the as-prepared a-TiO2/rGO composites also have great potential owing to its facile synthesis and highly efficient microwave absorption.

scholarly journals A Neutron Diffraction Investigation of High Valent Doped Barium Ferrite With Super-wide Tunable Microwave Absorption

2021 ◽  
Author(s):  
J. Li ◽  
Yang Hong ◽  
San He ◽  
Weike Li ◽  
Han Bai ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Microwave Absorption ◽  
Barium Ferrite ◽  
Sol Gel ◽  
Double Resonance ◽  
Low Frequency ◽  
Anisotropy Field ◽  
Wide Band ◽  
Crystal Anisotropy ◽  
High Valent

Abstract The Barium ferrite BaTixFe12-xO19 (x = 0.2, 0.4, 0.6, 0.8) ceramics doped by Ti4+ (BFTO-x) were synthesized by a modified sol-gel method. The crystal structure and magnetic structure of the samples were determined by neutron diffraction, and confirm that the BFTO-x ceramics were high quality single phase with sheet micro-structure. With x increasing from 0.2 to 0.8, the Ms decreases gradually but the change of Hc is complex under the synergy of the changed grain size and the magnetic crystal anisotropy field. Relying on the high valence of Ti4+, double resonance peaks are obtained in the curves of μ′′ and the resonance peaks could move towards the low frequency with the increase of x, which facilitate the samples perform an excellent wide-band modulation microwave absorption property. In the x = 0.2 sample, the maximum reflection loss can reach –44.9 dB at the thickness of only 1.8 mm, and the bandwidth could reach to 5.28 GHz at 2 mm when the RL is less than –10 dB. All the BFTO-x ceramics show excellent frequency modulation ability varying from 18 GHz (x = 0.8) to 4 GHz (x = 0.4), which covers 81% of the investigated frequency in microwave absorption field.

Microwave absorption properties of hexagonal barium doped @cip composite in wide band

2018 ◽  
Vol 209 ◽  
pp. 298-302 ◽  
Author(s):  
F.Z. Mohammad ◽  
H. Arshad ◽  
M. Mudsar ◽  
S. Jawad ◽  
K.M. Ali
Keyword(s):  
Microwave Absorption ◽  
Wide Band ◽  
Absorption Properties ◽  
Microwave Absorption Properties
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