片状羰基铁的负载量与尺寸对其吸波性能的影响

doi:10.19976/j.cnki.43-1448/TF.2026055

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摘要片状羰基铁(flake carbonyl iron, FCI)/石蜡复合材料因其优异的电磁损耗特性,在宽频吸波领域展现出巨大潜力。本研究采用熔融共混-模压成形法将FCI粉添加至熔融状态的石蜡中,制备FCI/石蜡复合材料,研究FCI负载量与片层尺寸对复合材料吸波性能的协同调控机理。结果表明：片层尺寸会显著影响FCI/石蜡复合材料的吸波性能,负载质量分数40%的中等尺寸FCI (X-2,11~14 μm)时复合材料的综合性能最优,于1.7 mm的匹配厚度下可获得-48.75 dB的最小反射损耗和7.47 GHz (10.26~17.73 GHz)的有效吸收带宽。FCI/石蜡复合材料吸波性能的提高主要归因于FCI片层尺寸与其负载量协同调控电磁损耗机制以及阻抗匹配状态。

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	汪旭
	邢旭阳
	李祥
	杨树人
	刘欣
	官林跃
	邓富森
	乔明涛

关键词 ：片状羰基铁粉, 吸波材料, 低频吸波性能, 协同设计, 阻抗匹配, 宽频吸波

Abstract：Flake carbonyl iron (FCI)/paraffin composites exhibit excellent electromagnetic loss characteristics and show great potential for broadband microwave absorption applications. In this study, FCI powder was incorporated into molten paraffin via a melt-blending and compression-molding process to fabricate FCI/paraffin composites. The synergistic regulation mechanisms of FCI loading content and flake size on the electromagnetic wave absorption properties of the composites were investigated. The results indicate that flake size significantly influences the absorption performance. The composite with medium-sized FCI (X-2, 11-14 μm) at a loading mass fraction of 40% achieves the best overall performance, exhibiting a minimum reflection loss of -48.75 dB and an effective absorption bandwidth of 7.47 GHz (10.26-17.73 GHz) at a matching thickness of 1.7 mm. The enhancement in the absorption performance of the FCI/paraffin composites is primarily attributed to the synergistic regulation of the electromagnetic loss mechanisms and impedance matching states by the FCI flake size and its loading content.

Key words： flake carbonyl iron powder microwave absorption material low-frequency absorption performance synergistic design impedance matching broadband microwave absorption

收稿日期: 2026-05-08 出版日期: 2026-11-12

ZTFLH:

TM25

基金资助:国家自然科学基金资助项目(52302112); 陕西省教育厅科学研究计划资助项目(22JY037); 大学生创新创业训练计划项目(202510703057,S202610703)

通讯作者: 乔明涛,副教授,博士。电话：18991246389;E-mail: mtaiao@xauat.edu.cn

作者简介: ^*为共同一作

引用本文:

汪旭, 邢旭阳, 李祥, 杨树人, 刘欣, 官林跃, 邓富森, 乔明涛. 片状羰基铁的负载量与尺寸对其吸波性能的影响[J]. 粉末冶金材料科学与工程, 2026, 31(5): 544-556.
WANG Xu, XING Xuyang, LI Xiang, YANG Shuren, LIU Xin, GUAN Linyue, DENG Fusen, QIAO Mingtao. Effects of loading content and size on electromagnetic wave absorption performance of flake carbonyl iron[J]. Materials Science and Engineering of Powder Metallurgy, 2026, 31(5): 544-556.

链接本文:

http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2026055 或 http://pmbjb.csu.edu.cn/CN/Y2026/V31/I5/544

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