AI Article Synopsis
- FeAl is an effective material for absorbing microwave energy, but its performance is limited by high density and poor impedance matching.
- Researchers created a new absorber by combining FeAl with carbon nanotubes (CNTs) to improve performance.
- The optimal mixture, featuring 1.5% CNTs, enhances both magnetic and dielectric loss, achieving excellent impedance matching and a wide absorption bandwidth of 4.73 GHz at a 2 mm thickness.*
Article Abstract
FeAl is a good magnetic loss absorber for microwave absorption. However, due to the relatively high density and poor impedance matching ratio, the potential of FeAl cannot be fully released. Herein, a dielectric loss absorber of carbon nanotubes (CNTs) is coupled with FeAl to form FeAl/CNTs composite absorbers. CNTs are randomly tangled and coated on the surface of the FeAl flakes, forming a connecting conductive network. By carefully tuning the content of CNTs, the optimized FeAl/CNTs composite absorber with 1.5% of CNTs can combine both magnetic loss and dielectric loss mechanisms, thus achieving an impedance matching ratio close to 1 while keeping strong attenuation for enhanced microwave absorption. As a result, an effective absorption bandwidth (RL ≤ -10 dB) of 4.73 GHz at a thickness of 2 mm is achieved.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10985793 | PMC |
| http://dx.doi.org/10.1039/d4ra00955j | DOI Listing |
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