(FeNi)x(SiO2)1-x nano-granular film modified carbon foam for broad-band microwave absorption

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL Applied Surface Science Pub Date : 2025-03-30 DOI:10.1016/j.apsusc.2025.163124

Yangjun Zou , Lanzhi Wang , Benhui Fan , Jianling Yue , Yu Liu , Xiaozhong Huang

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Abstract

The development of high-performance absorbing materials characterized by “thin thickness, low density, broad frequency range, and strong absorption” remains a significant challenge. In this research, the magnetron sputtering method was used to deposit a series of nano-granular films with different SiO₂ contents onto carbon foam, creating hierarchical CMF/(FeNi)_x(SiO₂)_1-x composites. The microstructure of the nano-granular film reveals that the FeNi nano-grains are interconnected and embedded within an amorphous SiO₂ phase matrix. Numerous heterogeneous interfaces are formed as the SiO₂ phase refines the FeNi nano-grains. When the SiO₂ content in the granular film is 5 %, the CMF/(FeNi)_0.95(SiO₂)_0.05 sample exhibits the best absorption performance, achieving a minimum reflection loss of −56.3 dB at 2.5 mm and a maximum effective absorption bandwidth of 8 GHz at 2.7 mm. The combined contributions of conductivity loss, dielectric polarization loss, and magnetic loss, along with multiple reflections of electromagnetic waves caused by the porous network structure, showcase the remarkable wave absorption capacity of CMF/(FeNi)_x(SiO₂)_1-x.

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用于宽带微波吸收的（FeNi）x(SiO2)1-x纳米颗粒膜改性碳泡沫

开发“薄厚度、低密度、宽频率范围、强吸收”的高性能吸波材料仍然是一个重大挑战。在本研究中，采用磁控溅射方法在泡沫碳上沉积了一系列不同SiO2含量的纳米颗粒膜，形成了层次化的CMF/(FeNi)x(SiO2)1-x复合材料。纳米颗粒膜的微观结构表明，FeNi纳米颗粒相互连接并嵌入在无定形SiO2相基体中。SiO2相细化了FeNi纳米晶粒，形成了大量非均相界面。当颗粒膜中SiO2含量为5 %时，CMF/(FeNi)0.95(SiO2)0.05样品的吸收性能最好，在2.5 mm处反射损耗最小为−56.3 dB，在2.7 mm处有效吸收带宽最大为8 GHz。CMF/(FeNi)x(SiO2)1-x的电导率损耗、介电极化损耗和磁损耗的综合贡献，以及多孔网络结构对电磁波的多次反射，显示了CMF/(FeNi)x(SiO2)1-x的显著吸波能力。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.