scholarly journals Controllable Fabrication of Fe3O4/ZnO Core–Shell Nanocomposites and Their Electromagnetic Wave Absorption Performance in the 2–18 GHz Frequency Range

Materials ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 780 ◽  
Author(s):  
Xiaodong Sun ◽  
Guangyan Ma ◽  
Xuliang Lv ◽  
Mingxu Sui ◽  
Huabing Li ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Core Shell ◽  
Frequency Range ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorption Performance ◽  
Controllable Fabrication

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.

Core-shell structured Fe/ZnO composite with superior electromagnetic wave absorption performance

2021 ◽  
Vol 47 (10) ◽  
pp. 14506-14514
Author(s):  
Qi Liu ◽  
Jingxiong Dai ◽  
Fei Hu ◽  
Zhiquan Zhang ◽  
Kun Xiong ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Core Shell ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorption Performance
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