摘要
为实现复杂电磁环境中航空器对低频电磁波的高效吸收,开展了微波热处理调控有机金属框架(Metal-Organic Framework, MOF)衍生物形貌及缺陷结构对电磁波吸收性能影响的研究.通过调节热处理的温度,改变衍生物微观形貌结构,实现对电磁波吸收性能的有效调控.结果表明,在700℃微波热处理两小时后,所得衍生物在5.86 GHz频率下具有最小反射损耗-41.42 dB,匹配厚度为3.7 mm.综合分析表明,在微波作用下,衍生物表面形貌呈现明显的棉花状团簇结构,有效增加了缺陷类型,丰富了极化弛豫过程,实现了材料在低频段对电磁波的有效吸收.本研究为低频高效吸收材料的设计提供了新的研究思路.
In order to achieve efficient absorption of low-frequency electromagnetic waves by aircraft in complex electromagnetic environments,this study investigates the effect of microwave heat treatment on regulating the morphology and defect structure of MOF(Metal-Organic Framework)derivatives and their influence on electromagnetic wave absorption properties.By adjusting the heat treatment temperature,the microstructure of the derivatives is modified,enabling effective regulation of electromagnetic wave absorption performance.The results show that after microwave heat treatment at 700℃for 2 hours,the obtained derivative exhibits a minimum reflection loss of-41.42 dB at 5.86 GHz with a matching thickness of 3.7 mm.Comprehensive analysis indicates that under microwave action,the surface morphology of the derivatives presents distinct cotton-like cluster structures,which effectively increase defect types,enrich polarization relaxation processes,and thus achieve efficient absorption of electromagnetic waves in the low-frequency band.This research provides new insights for the design of low-frequency high-efficiency absorption materials.
作者
罗航
郭胜惠
叶小磊
杨黎
李云川
LUO Hang;GUO Shenghui;YE Xiaolei;YANG Li;LI Yunchuan(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《昆明理工大学学报(自然科学版)》
北大核心
2025年第6期1-12,共12页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(52364051,52374389)。
关键词
电磁波吸收
微波调控
MOF衍生物
低频吸收
极化损耗
electromagnetic wave absorption
microwave regulation
MOF derivatives
low-frequency absorption
polarization loss
