NiCo2O4 nanoneedles decorated woven carbon fibres for electromagnetic shielding in X-band
| Autor: | Ashutosh C. Abhyankar, Kaumudi Yadav, Chetan Kotabage |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering Composite number X band chemistry.chemical_element 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Cobaltite chemistry.chemical_compound Nickel chemistry Mechanics of Materials Electromagnetic shielding General Materials Science Composite material 0210 nano-technology Absorption (electromagnetic radiation) Carbon |
| Zdroj: | Materials Letters. 292:129622 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2021.129622 |
| Popis: | Nickel cobaltite (NiCo2O4) nanoneedles were grafted in-situ on the woven carbon fibres (WCF) with hydrothermal reaction time increasing from 6 to 18 hr. Shielding effectiveness (SE), measured in the X-band of 12 hr treated NiCo2O4@WCF [72 dB], is considerably larger than the bare WCF [40 dB], with the dominant contribution from absorption. The significant improvement of SE in NiCo2O4@WCF is attributed to an anomalously large dielectric constant (~300–600, over a range of 8.2 to 12.4 GHz) resulting from interfacial polarization between NiCo2O4 nanoneedles and WCF. A technique useful for large-scale production of low density, flexible and thin (~0.4 mm) NiCo2O4@WCF composite fabrics, with excellent absorption of X-band waves, is developed. |
| Databáze: | OpenAIRE |
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