| Autor: |
CAO Xuefang, HE Yongliang, JIA Xuefei, LUO Xiuhong, WU Lingna, LIANG Zhiwen, YUE Jia, YANG Qingshan |
| Zdroj: |
Journal of Functional Materials / Gongneng Cailiao; 2024, Vol. 55 Issue 2, p02174-02180, 7p |
| Abstrakt: |
Composite material La0.7Sr0.3MnO3/α-Fe2O3 was prepared by high-temperature calcination method and its structure, electromagnetic parameters, and electromagnetic wave absorption performance were studied. Further preliminary exploration was conducted on the electromagnetic wave absorption effect of this powder for fabric coatings. The results showed that the significant absorption performance of La0.7Sr0.3MnO3/α-Fe2O3 is achieved when the powder and paraffin are mixed in a mass ratio of 7:3, and they can absorb over 99.9% of incident electromagnetic waves at a thickness of 5.0 mm and 9.5 mm, respectively. The absorption performance is excellent. In addition, within the range of 1-18 GHz and 1.0-10 mm, the total effective absorption (≤-10 dB) bandwidth of the sample La0.7Sr0.3MnO3/α-Fe2O3 covers 91.8% of the test bandwidth, achieving effective absorption of radar multi frequency bands. The excellent absorption performance of composite materials is attributed to the La0.7Sr0.3MnO3/α-Fe2O3. The combined effect of dielectric loss and magnetic loss of La0.7Sr0.3MnO3/α-Fe2O3 achieves effective absorption of electromagnetic waves. The fabrics prepared by coating method and plain weave methods can also absorb more than 90% of incident electromagnetic waves at 5.84 GHz, providing new ideas for the design and research of composite absorbing material and absorbing fabrics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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