Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 9, Pages 12389-12396Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.01.093
Keywords
FeCo; Flake-shaped structure; Dielectric and magnetic loss; Microwave absorption
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Funding
- Jiangsu Provincial Key Laboratory of Bionic Functional Materials
- Fundamental Research Funds for the Central Universities [NS2020037]
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Flake-shaped FeCo/BaFe12O19 composites with remarkable microwave absorption performance were successfully prepared through a two-step process involving ball milling and sol-gel treatment. Flexible control of applicable frequency ranges of the composites is achievable by changing mass fractions of BaFe12O19. The minimum reflection loss can reach -51.22 dB with effective loss of < 10 dB at a BaFe12O19 mass fraction of 20%.
In this work, flake-shaped FeCo/BaFe12O19 composites were successfully prepared via a facile two-step process involving ball milling and sol-gel treatment. Compared with commonly used FeCo alloys, FeCo/BaFe12O19 composite material can achieve remarkable microwave absorption performance, and this is largely because of the flake-shaped structure and dielectric relaxation processes. Furthermore, changing mass fractions of BaFe12O19 enable flexible control of applicable frequency ranges of FeCo/BaFe12O19 composites. It was found that when the BaFe12O19 mass fraction is as high as 20%, minimum reflection loss can reach -51.22 dB with effective loss of < ?10 dB and effective bandwidth of 6.24 GHz even at a thin thickness of 1.45 mm. It is highly believed that these significant achievements will arouse interest from researchers for further practical exploration of microwave absorbers.
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