Oxidation Resistance and Microwave Absorption of FeCo@Nano-SiO2

被引：0
|
作者：
Li J. [1 ]
Zhu Y. [1 ]
Li X. [1 ]
Chen P. [1 ]
Zhu B. [1 ]
机构：
[1] The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 06期
关键词：
Effective absorption bandwidth; Electromagnetic wave absorption; Iron-cobalt alloy@nano-silicon dioxide; Oxidation resistance;
D O I：
10.14062/j.issn.0454-5648.20200651
中图分类号：
学科分类号：
摘要：
FeCo@nano-SiO2 was prepared via a modified Stöber method using tetraethyl orthosilicate using FeCo as raw materials. The results show that the powder has a uniform core-shell structure. The reflection loss (RL) of FeCo@nano-SiO2 reaches -36.1 dB with the thickness of 2.6 mm, and the effective absorption bandwidth with RL< -10 dB is 3.2 GHz when the content of SiO2 is 35% (in mass fraction). The mass of FeCo@nano-SiO2 only increases 2% from room temperature to 800 °C, and the optimum oxidation resistance can be obtained at the content of SiO2 of 65%. The SiO2 shell optimizes the impedance matching of FeCo, further facilitating the electromagnetic wave absorption, and prevents the contact between FeCo and oxygen at a high temperature, thus improving the oxidation resistance. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1135 / 1142
页数：7
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