Double-layer Electromagnetic Wave Absorber Based on Carbon Nanotubes Doped with La(NO3)3 and Fe3O4 Nanoparticles
<p>Double-layer structure absorbing materials based on the impedance matching principle and transmission line theory can effectively improve the electromagnetic wave absorbing properties. In this paper, the electro-magnetic wave absorbing properties of double-layer absorbers (2 mm thickness),...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Kaunas University of Technology
2017-08-01
|
| Series: | Medžiagotyra |
| Subjects: | |
| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/16279 |
| Summary: | <p>Double-layer structure absorbing materials based on the impedance matching principle and transmission line theory can effectively improve the electromagnetic wave absorbing properties. In this paper, the electro-magnetic wave absorbing properties of double-layer absorbers (2 mm thickness), where multiwall carbon nanotube (MWCNT)-La(NO<sub>3</sub>)<sub>3</sub>/polyvinyl chloride (PVC) and MWCNT-Fe<sub>3</sub>O<sub>4</sub>/PVC composites had been taken turns as the absorption layer and matching layer, were investigated in 2<sub> </sub>–<sub> </sub>18 GHz range. The absorbing properties of single- and double-layer structure and different each-layer thickness with two types of combinations were compared. The results showed that the design of double-layer structure for composites could effectively broaden the absorption frequency area, and increase the absorption intensity. When MWCNT-La(NO<sub>3</sub>)<sub>3</sub>/PVC composite were used as absorption layers with 0.6 mm thickness, the absorption bandwidth (< –<sub> </sub>15 dB or > 97 %) of double-layer composite was the widest, reaching a maximum of about 3.36 GHz, and the absorption peak value was also the lowest about –<sub> </sub>46.02 dB at 16.24 GHz.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.23.3.16279">http://dx.doi.org/10.5755/j01.ms.23.3.16279</a></p> |
|---|---|
| ISSN: | 1392-1320 2029-7289 |