Facile fabrication of rGO/Zr4+-Ni2+ gradient-doped BaM composites for broad microwave absorption bandwidth
| Autor: | Yunjia Hu, Chuyang Liu, Haonan Gong, Kangsen Peng, Kongjun Zhu, Songhan Duan, Yanting Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Permittivity Fabrication Materials science Process Chemistry and Technology Bandwidth (signal processing) Reflection loss Doping Impedance matching 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials 0103 physical sciences Materials Chemistry Ceramics and Composites Composite material 0210 nano-technology Microwave |
| Zdroj: | Ceramics International. 47:4333-4337 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.09.273 |
| Popis: | The combination of magnetic and dielectric materials is an effective and efficient approach to enhance microwave absorption performance. In this work, rGO/Zr4+-Ni2+ gradient-doped BaM composites were fabricated for broad microwave absorption bandwidth. The results show that the permittivity increases while the permeability reduces gradually with the rising of rGO content. With the mass ratio of rGO increasing up to 15%, the relatively high attenuation constant and good impedance matching condition lead to an outstanding microwave absorption performance with a broad bandwidth of 8.16 GHz and a minimum reflection loss of −57.07 dB at a thin matching thickness of 2.0 mm. Compared with the pure gradient-doped BaM sample, the bandwidth has been widened by 37.37% and the minimum reflection loss has been improved by 220.43%. The performance is also superior to most of the existing state-of-art absorbers. |
| Databáze: | OpenAIRE |
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