Enhanced electromagnetic absorbing performance of MOF-derived Ni/NiO/Cu@C composites
| Autor: | Cunguang Chen, Shuangchen Ruan, Xiaoyong Huang, Lina Huang, Yu-Jia Zeng |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Non-blocking I/O Composite number Reflection loss Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Metal Mechanics of Materials Electrical resistivity and conductivity visual_art Ceramics and Composites visual_art.visual_art_medium Composite material 0210 nano-technology Porosity Microwave |
| Zdroj: | Composites Part B: Engineering. 164:583-589 |
| ISSN: | 1359-8368 |
| Popis: | Metal-organic frameworks (MOFs) appear as promising candidates for microwave absorbing materials with a low density as well as tunable electromagnetic parameters. In this study, a facile strategy to fabricate microwave absorbing materials has been demonstrated by introducing metallic Ni nanoparticles into carbon matrix which takes advantage of extremely porous structure. The magnetic Ni composition in the final products can be controlled, which offers an effective way to tune electromagnetic properties. Interfacial polarization is considered to be one of the most important attenuation mechanisms, which can be changed by increasing the interface area and electrical conductivity. When the filler loading of Ni/NiO/Cu@C composite in paraffin matrix is only 10 wt%, a minimum reflection loss of −38.1 dB is achieved at a layer thickness of 3.2 mm. The low density of the filler loading can be guaranteed by enhancing the conduction loss and impedance matching. |
| Databáze: | OpenAIRE |
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