Synthesis and strengthened microwave absorption properties of three-dimensional porous Fe3O4/graphene composite foam
| Autor: | Xuehua Gao, Yunan Shi, Jun Qiu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Graphene Process Chemistry and Technology Composite number Reflection loss Oxide 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electromagnetic radiation Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law 0103 physical sciences Materials Chemistry Ceramics and Composites Energy transformation Composite material 0210 nano-technology Porosity Microwave |
| Zdroj: | Ceramics International. 45:3126-3132 |
| ISSN: | 0272-8842 |
| Popis: | The three-dimensional porous Fe3O4/graphene composite foam as a new kind of absorbing composite with electrical loss and magnetic loss was successfully synthesized by a facile method. Fe3O4 was evenly attached on structure of graphene sheets which overlapped with each other to form three-dimensional porous graphene foam. The results revealed that when the mass ratio of graphene oxide (GO) and Fe3O4 was 1:1, the Fe3O4/graphene composite foam possessed the best absorption properties: the minimum reflection loss was up to − 45.08 dB when the thickness was 2.5 mm and the bandwidth below − 10 dB was 6.7 GHz when the content of the composite foam absorbents was just 8%. The micron-sized three-dimensional porous structure provided more propagation paths, enhancing the energy conversion of incident electromagnetic waves. The addition of Fe3O4 contributed to improving the impedance matching performance and magnetic loss. The three-dimensional porous Fe3O4/graphene composite foam was a kind of high-efficiency wave absorber, providing a new idea for the development of microwave absorbing materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect