SmFeN 含量对三明治结构 YSZ/SmFeN/YSZ 复合材料电磁波吸收特性的影响

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-19 DOI:10.1016/j.ceramint.2024.09.246

Hongning Zhang, Tianni Lu, Qianxi Zhang, Zhenwei Huang, Na Li, Jinman Zhang, Chunzhong Liu

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引用次数: 0

摘要

本研究使用热障材料钇稳定氧化锆（YSZ）和电磁波吸收剂钐铁氮（SmFeN）制备了一种 YSZ/SmFeN/YSZ 夹层结构复合材料。制备的 YSZ/SmFeN 界面垂直于电磁波的方向。利用电磁参数、阻抗匹配、科尔-科尔圆和最小反射损耗（RLmin 值）研究了不同 SmFeN 含量复合材料的电磁波衰减及其机理。介电损耗是复合材料电磁波衰减的主要机制。此外，SmFeN 的偶极取向和相界面的存在也诱发了介电损耗。偶极取向极化机制受 SmFeN 含量的影响；复合材料中 SmFeN 含量越低，ε（介电常数的实部）越高。ε达到峰值的频率随 SmFeN 含量的增加而降低。在 4.0-8.0 GHz 频段观察到较高的介电损耗。电磁波吸收率表明，当 YSZ:SmFeN:YSZ 的厚度比为 1:4:1、厚度为 3.325 mm 时，电磁波吸收效果最佳。相应的 RLmin 为 -35.3 dB，有效吸收带宽为 9.5 GHz（8.3-17.9 GHz）。

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Effects of the SmFeN content on the electromagnetic wave absorbing properties of sandwich-structured YSZ/SmFeN/YSZ composites

In this study, the thermal barrier material Yttria Stabilized Zirconia (YSZ) and the electromagnetic wave (EMW) absorbing agent samarium iron nitrogen (SmFeN) were used to prepare a YSZ/SmFeN/YSZ sandwich-structured composite. The YSZ/SmFeN interface was prepared perpendicular to the directions of EMWs. The EMW attenuation of the composites with different SmFeN contents and their mechanisms were studied using electromagnetic parameters, impedance matching, Cole–Cole circles, and minimum reflection loss (RL_min value). Dielectric loss was the dominant mechanism behind EMW attenuation for the composites. In addition, the dipole orientation of SmFeN and the presence of phase interface induced the dielectric loss. The mechanism of dipole orientation polarization was influenced by SmFeN content; the lesser the SmFeN content in the composite, the higher the ε

'

(real part of dielectric coefficient). The frequency at which ε

'

peaked shifted decreased with increasing SmFeN content. Higher dielectric losses were observed in the frequency band of 4.0–8.0 GHz. The EMW absorption rate showed that the optimum EMW absorption effect was achieved when the thickness ratio of YSZ:SmFeN:YSZ was 1:4:1 and the thickness is 3.325 mm. The corresponding RL_min was −35.3 dB and effective absorption bandwidth was 9.5 GHz (8.3–17.9 GHz).

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.