Novel ceramic-based microwave absorbents derived from gangue

2020 ◽  
Vol 8 (40) ◽  
pp. 14238-14245
Author(s):  
Guomin Li ◽  
Lutao Mao ◽  
Baoshun Zhu ◽  
Xin Chang ◽  
Yake Wang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
High Performance ◽  
Absorption Bandwidth ◽  
Effective Absorption

Compared with gangue, FeG700 exhibited high-performance microwave absorption with a reflection loss of −41.9 dB and an effective absorption bandwidth of 4.1 GHz.

Hollow porous Fe2O3 microspheres wrapped by reduced graphene oxides with high-performance microwave absorption

2019 ◽  
Vol 7 (36) ◽  
pp. 11167-11176 ◽  
Author(s):  
Lei Wang ◽  
Jie Zhang ◽  
Min Wang ◽  
Renchao Che
Keyword(s):  
Microwave Absorption ◽  
Reflection Loss ◽  
High Performance ◽  
Graphene Oxides ◽  
Absorption Bandwidth ◽  
Effective Absorption ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides

Hollow porous Fe2O3 microspheres wrapped by thin RGO sheets exhibited high-performance microwave absorption with a reflection loss value of −48.1 dB and an effective absorption bandwidth cover of 5.28 GHz.

scholarly journals Enhancement of microwave absorption bandwidth of MXene nanocomposites through macroscopic design

2020 ◽  
Vol 7 (8) ◽  
pp. 200456 ◽  
Author(s):  
Pritom J. Bora ◽  
T. R. Suresh Kumar ◽  
Daniel Q. Tan
Keyword(s):  
Microwave Absorption ◽  
Polymer Nanocomposites ◽  
Reflection Loss ◽  
The Other ◽  
Two Dimensional ◽  
Absorption Bandwidth ◽  
Hybrid Matrix ◽  
New Family ◽  
Two Dimensional Materials ◽  
First Time

MXene, the new family of two-dimensional materials having numerous nanoscale layers, is being considered as a novel microwave absorption material. However, MXene/functionalized MXene-loaded polymer nanocomposites exhibit narrow reflection loss (RL) bandwidth (RL less than or equal to −10 dB). In order to enhance the microwave absorption bandwidth of MXene hybrid-matrix materials, for the first time, macroscopic design approach is carried out for TiO 2 -Ti 3 C 2 T x MXene and Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x MXene hybrids through simulation. The simulated results indicate that use of pyramidal meta structure of MXene can significantly tune the RL bandwidth. For optimized MXene hybrid-matrix materials pyramid pattern, the bandwidth enhances to 3–18 GHz. Experimental RL value well matched with the simulated RL. On the other hand, the optimized Fe 3 O 4 @TiO 2 -Ti 3 C 2 T x hybrid exhibits two specific absorption bandwidths (minimum RL value - −47 dB). Compared with other two-dimensional nanocomposites such as graphene or Fe 3 O 4 -graphene, MXene hybrid-matrix materials show better microwave absorption bandwidth in macroscopic pattern.

Temperature dependence of the electromagnetic and microwave absorption properties of polyimide/Ti3SiC2 composites in the X band

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86656-86664 ◽  
Author(s):  
Hongyu Wang ◽  
Dongmei Zhu ◽  
Wancheng Zhou ◽  
Fa Luo
Keyword(s):  
Temperature Dependence ◽  
Microwave Absorption ◽  
Reflection Loss ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Bandwidth ◽  
X Band ◽  
Maximum Reflection Loss

The maximum reflection loss value of polyimide/Ti3SiC2 composites is up to −48.6 dB at 8.5 GHz with a thickness of 2.9 mm and the absorption bandwidth below −10 dB is 3.8 GHz.

scholarly journals Electromagnetic and microwave absorption properties of iron pentacarbonyl pyrolysis-synthesized carbonyl iron fibers

RSC Advances ◽  
2020 ◽  
Vol 10 (40) ◽  
pp. 23702-23711
Author(s):  
Chaoqun Ge ◽  
Liuying Wang ◽  
Gu Liu ◽  
Kejun Xu ◽  
Long Wang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Carbonyl Iron ◽  
Iron Pentacarbonyl ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Bandwidth ◽  
Effective Absorption

Carbonyl iron fibers synthesized at 300 °C exhibit a minimum RL of −58.1 dB and an effective absorption bandwidth of 5.66 GHz.

scholarly journals Structural, microstructural, magnetic and electromagnetic absorption properties of spiraled multiwalled carbon nanotubes/barium hexaferrite (MWCNTs/BaFe12O19) hybrid

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nurshahiera Rosdi ◽  
Raba’ah Syahidah Azis ◽  
Ismayadi Ismail ◽  
Nurhidayaty Mokhtar ◽  
Muhammad Misbah Muhammad Zulkimi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Multiwalled Carbon Nanotubes ◽  
Reflection Loss ◽  
Barium Hexaferrite ◽  
High Energy ◽  
Absorption Properties ◽  
Multiwalled Carbon ◽  
Absorption Bandwidth ◽  
Minimum Reflection Loss

AbstractMicrowave absorption properties were systematically studied for synthesised barium hexaferrite (BaFe12O19) nanoparticles and spiraled multiwalled carbon nanotubes (MWCNTs) hybrid. BaFe12O19 nanoparticles were synthesised by a high energy ball milling (HEBM) followed by sintering at 1400 °C and structural, electromagnetic and microwave characteristics have been scrutinized thoroughly. The sintered powders were then used as a catalyst to synthesise spiraled MWCNTs/BaFe12O19 hybrid via the chemical vapour deposition (CVD) process. The materials were then incorporated into epoxy resin to fabricate single-layer composite structures with a thickness of 2 mm. The composite of BaFe12O19 nanoparticles showed a minimum reflection loss is − 3.58 dB and no has an absorption bandwidth while the spiraled MWCNTs/BaFe12O19 hybrid showed the highest microwave absorption of more than 99.9%, with a minimum reflection loss of − 43.99 dB and an absorption bandwidth of 2.56 GHz. This indicates that spiraled MWCNTs/BaFe12O19 hybrid is a potential microwave absorber for microwave applications in X and Ku bands.

scholarly journals Facile design of a ZnO nanorod–Ni core–shell composite with dual peaks to tune its microwave absorption properties

RSC Advances ◽  
2017 ◽  
Vol 7 (15) ◽  
pp. 9294-9302 ◽  
Author(s):  
Jiushuai Deng ◽  
Qibiao Wang ◽  
Yuanyuan Zhou ◽  
Biao Zhao ◽  
Rui Zhang
Keyword(s):  
Microwave Absorption ◽  
Core Shell ◽  
Zno Nanorod ◽  
Absorption Bands ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Absorption Bandwidth ◽  
Effective Absorption ◽  
Shell Composite

The Ni/ZnO composites show two wide attractive absorption bands, which could broaden the effective absorption bandwidth.

Ferromagnetic Co20Ni80 nanoparticles encapsulated inside reduced graphene oxide layers with superior microwave absorption performance

2019 ◽  
Vol 7 (10) ◽  
pp. 2943-2953 ◽  
Author(s):  
Xuefeng Yu ◽  
Lei Wang ◽  
Jiwei Liu ◽  
Shuyan Xue ◽  
Liting Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Reflection Loss ◽  
Oxide Layers ◽  
Absorption Bandwidth ◽  
Reduced Graphene ◽  
Microwave Loss ◽  
Absorption Performance ◽  
Microwave Absorption Performance

The size regulation of rGO/Co20Ni80 nanocomposites improves microwave loss properties in terms of the reflection loss value and absorption bandwidth.

A novel metal–organic framework derived carbon nanoflower with effective electromagnetic microwave absorption and high-performance electrochemical energy storage properties

2021 ◽  
Author(s):  
Liwei Zhu ◽  
Ning Liu ◽  
Xincheng Lv ◽  
Ziqiu Zhang ◽  
Liangmin Yu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Microwave Absorption ◽  
High Performance ◽  
Metal Organic Framework ◽  
Electrochemical Energy Storage ◽  
Carbon Nanomaterial ◽  
Energy Storage Properties ◽  
Metal Organic ◽  
Storage Properties ◽  
Electrochemical Energy

A novel carbon nanomaterial with unique morphology was prepared and proven to be an effective material for EMWA and electrochemical energy storage.

Fabrication of flower-like surface Ni@Co3O4 nanowires anchored on RGO nanosheets for high-performance microwave absorption

2021 ◽  
pp. 150483
Author(s):  
Zhouyu Tong ◽  
Yuxin Bi ◽  
Mingliang Ma ◽  
Zijian Liao ◽  
Weibo Huang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Performance
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