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- Title
Electromagnetic wave absorption of hierarchical porous MWCNTs@ZnO/NiO composites enhanced by multiple polarization and dielectric loss.
- Authors
Hu, Mingqiang; Xing, Honglong; Shi, Ran; Ji, Xiaoli
- Abstract
In this study, two MWCNTs@ZnO/NiO composites, TS-A and TS-B, were synthesized through two methods, respectively, and a series of microscopic morphology characterization and electromagnetic test were performed. Microstructure characterization results suggested that TS-A dispersed well with hierarchical and porous structure, while TS-B grew unevenly as a result of tight bound. Electromagnetic tests show that the unique hierarchical and porous structure was key to the superior absorption performance of TS-A over TS-B, and played an important role in optimizing impedance matching and enhancing dielectric loss. The minimum reflection loss of TS-A reached − 46.65 dB at the thickness of 3.3 mm and the frequency of 3.58 GHz, and the EAB reached 3.89 GHz at the thickness of 1.5 mm. The above results indicate that the synthesis of hierarchical and porous structure is one of the effective ways to enhance the electromagnetic wave absorption ability of materials.
- Subjects
ELECTROMAGNETIC wave absorption; DIELECTRIC polarization; DIELECTRIC loss; ELECTROMAGNETIC testing; IMPEDANCE matching
- Publication
Journal of Materials Science: Materials in Electronics, 2020, Vol 31, Issue 20, p17339
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-020-04290-x