Synthesis of setaria viridis-like TiN fibers for efficient broadband electromagnetic wave absorption in the whole X and Ku bands
| Autor: | Jinglong Bu, Bin Zhu, Chen Yuejun, Heng-Yong Wei, Yingna Wei, Dong-feng Lv, Kai-zheng Xu, Cui Yi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Reflection loss General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electrospinning 0104 chemical sciences Surfaces Coatings and Films Crystal symbols.namesake chemistry X-ray photoelectron spectroscopy symbols Composite material 0210 nano-technology Tin Absorption (electromagnetic radiation) Raman spectroscopy Solid solution |
| Zdroj: | Applied Surface Science. 533:147439 |
| ISSN: | 0169-4332 |
| Popis: | The setaria viridis-like TiN fibers with efficient electromagnetic wave absorption in the whole X and Ku bands were prepared by electrospinning and hydrothermal methods. The results of XRD, Raman, and XPS suggested the presence of cubic TiN phase with TiOxNy solid solution form in fibers. The nanoneedles uniformly grew on the fibers’ surfaces along the (2 0 0) plane of cubic TiN crystal and formed a setaria viridis-like morphology. The bionic hierarchical structure gave rise to a large number of interfaces and pores, which would provide the suitable impedance matching, multiple reflections and scatterings, conductivity loss, and Debye relaxation through the synergistic effect. Hence, the superior absorption properties were achieved in the whole X and Ku bands by adjusting the fibers’ filler loading. The optimal reflection loss could reach −45.8 dB (X-band) at a thickness of 1.38 mm and −47.8 dB (Ku-band) at the thickness of 1.11 mm as the fibers absorbent contents were 20 wt% and 15 wt%, respectively. Furthermore, the effective absorption bandwidth covered the entire X and Ku bands with a thin thickness of 1.0–2.0 mm. |
| Databáze: | OpenAIRE |
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