期刊
CERAMICS INTERNATIONAL
卷 47, 期 12, 页码 16579-16587出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.02.229
关键词
Microwave absorption; Core-shell structure
资金
- National Natural Science Foundation of China [51772177]
- Shaanxi Science & Technology Coordination & Innovation Project of China [2017TSCXL-GY-0805]
- Science Fund for Distinguished Young Scholars of Shaanxi Province [2018JC-029]
BaFe12O19@MnO2 composite with core-shell structure was successfully designed and constructed using a facile hydrothermal method in this study. The introduction of nanostructured MnO2 enhanced the electromagnetic wave absorption performance, and the optimal temperature of the hydrothermal reaction was explored to achieve a maximum reflection loss of -54.39 dB and an effective absorbing bandwidth of 4.64 GHz. The simple preparation method and attractive performance make BaFe12O19@MnO2 a promising candidate as microwave absorbers.
BaFe12O19, a traditional ferrite, has always been extensively investigated as a microwave absorption material because of the application value. Herein, the core-shell BaFe12O19@MnO2 composite was designed and constructed successfully by a facile hydrothermal method. By introducing nanostructured MnO2, a typical dielectric loss medium, the electromagnetic wave absorption performance is effectively enhanced. The core-shell structure contributes to high interface polarization, thereby promoting the attenuation of electromagnetic waves. In addition, the optimal temperature of the hydrothermal reaction was explored through the characterization of the morphology and the analysis of microwave absorption performance. The result exhibits that the maximum reflection loss of the prepared BaFe12O19@MnO2-170 reaches -54.39 dB and the effective absorbing bandwidth reaches 4.64 GHz. The simple preparation method and attractive performance make BaFe12O19@MnO2 a promising candidate as microwave absorbers.
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