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- Title
Synthesis and Characterization of Co<sub>3</sub>O<sub>4</sub>/rGO Composite Magnetic Microwave Absorbing Materials.
- Authors
Chen, Ailiang; Luo, Guanwen; Sun, Xintao; Qiao, Jinxi; Cao, Jiang; Du, Zuojuan; Li, Bowen
- Abstract
To prepare high-performance microwave absorbing materials, Co3O4/reduced graphene oxide (rGO) composite materials were prepared from graphite powder and cobalt acetate by a simplified hydrothermal method. It is demonstrated that the reflection loss (RL) and effective absorption bandwidth (EAB) of Co3O4/rGO composites can be adjusted in accord of demands. By changing the thickness and the compositional ratio of the material, the electromagnetic parameters, attenuation constant and eddy current effect of the material can be adjusted to obtain desired outcomes. The EAB of Co3O4/rGO composites can cover 97.5% of 4–18 GHz band when thickness is 2–5 mm. The maximum RL of the obtained composite reached -64.8 dB when the thickness was 2.8 mm, and the maximum EAB was 9.63 GHz when the thickness was 3.0 mm. Because of its lamellar micromorphology, Co3O4 /rGO prepared in this study has made a breakthrough in its microwave absorption properties such as the highest reflection loss and effective absorption bandwidth. The result of this study provided a new approach for designing microwave absorption capacity.
- Subjects
MICROWAVE materials; GRAPHENE oxide
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 2, p407
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05598-1