2023年 05期

摘要(Abstract)：

为了研究铁硅铝合金颗粒表面钝化壳层对吸波性能的影响，采用纯氧热处理法在不同温度下对铁硅铝合金颗粒进行原位钝化，对钝化前、后粒子的微观结构、壳层成分、电磁性能和吸波性能进行表征与分析。结果表明： 当热处理温度为500 ℃ 时，合金粒子表层形成以Al2O3·SiO2为主要成分的薄壳层；钝化合金颗粒不仅保持良好的软磁性能，而且电阻率显著增大，复介电常数减小约50%,复磁导率稍有增大，导致吸波材料的阻抗匹配和吸收损耗能力显著增强；利用钝化铁硅铝合金吸收剂以质量分数为66.7%的填充率所制得厚度为2mm的吸波材料具有在频率为0.9~2.06GHz内吸收损耗大于6dB的吸收性能，频率1.35GHz处最大吸收损耗为7.5dB。

关键词(KeyWords)： 吸波材料；铁硅铝合金；钝化； 阻抗匹配；吸收损耗

基金项目(Foundation): 国家自然科学基金项目(52071239 , 51521001)

作者(Author): 王宇航，李维

DOI: 10.13349/j.cnki.jdxbn.20230718.002

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