High entropy rare earth hexaborides/tetraborides (HE REB6/HE REB4) composite powders with enhanced electromagnetic wave absorption performance

2021 ◽  
Author(s):  
Weiming Zhang ◽  
Biao Zhao ◽  
Na Ni ◽  
Huimin Xiang ◽  
Fu-Zhi Dai ◽  
...  
Keyword(s):  
Rare Earth ◽  
Electromagnetic Wave ◽  
Composite Powders ◽  
Electromagnetic Wave Absorption ◽  
High Entropy ◽  
Wave Absorption ◽  
Absorption Performance

Urchin-like polyaniline/magnetic carbon sphere hybrid with excellent electromagnetic wave absorption performance

2019 ◽  
Vol 248 ◽  
pp. 59-67 ◽  
Author(s):  
Xingliang Chen ◽  
Kailiang Zhong ◽  
Tao Shi ◽  
Xinlei Meng ◽  
Guanglei Wu ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Carbon Sphere ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorption Performance ◽  
Magnetic Carbon

scholarly journals The Electromagnetic Wave Absorption Performance and Mechanical Properties of Cement-Based Composite Material Mixed with Functional Aggregates with High Fe2O3 and SiC

2021 ◽  
Vol 31 (4) ◽  
pp. 249-255
Author(s):  
Zuoqun Zhang ◽  
Chaoshan Yang ◽  
Hua Cheng ◽  
Xiaohan Huang ◽  
Yuhao Zhu
Keyword(s):  
Composite Material ◽  
Electromagnetic Wave ◽  
Electromagnetic Waves ◽  
Building Materials ◽  
Magnetic Loss ◽  
Frequency Range ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Test Board ◽  
Absorption Performance

Now there’re many researches on the electromagnetic radiation protection function of the cement-based electromagnetic wave absorbing materials, such materials have been widely used in various types of buildings. This paper proposed an idea for preparing a cement-based composite material by mixing functional aggregates with high content of Fe2O3 and SiC, that is, adding Fe3O4 powder and nano-SiC of different contents in the clay, and then sintering at 1190℃; the prepared aggregates showed obvious magnetic loss and dielectric loss to electromagnetic waves, and the numerical tube pressure could reach 16.83MPa. The double-layer reflectivity test board made of functional aggregates showed excellent electromagnetic wave absorption performance, its reflection loss was less than -10dB in the frequency range of 8~18GHz (corresponding to energy absorption greater than 90% EM), and its maximum RL reached -12.13dB. In addition, the compressive strength of the cement-based composite material at the age of 28 days reached 50.1 MPa, which can meet the strength requirements of building materials.

Effect of nanoporosity on the electromagnetic wave absorption performance in a biomass-templated Fe3O4/C composite: a small-angle neutron scattering study

2020 ◽  
Vol 8 (1) ◽  
pp. 319-327 ◽  
Author(s):  
Yuan Fang ◽  
Weidong Xue ◽  
Rui Zhao ◽  
Shengxiang Bao ◽  
Wenjian Wang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorption Performance ◽  
Scattering Study ◽  
Neutron Scattering Study

Small-angle neutron scattering was used to investigate the effect of nanoporosity on electromagnetic wave absorption in biomass-templated Fe3O4/C.

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