In-situ grown heterophase SiO2/SiCnws in PDCs-SiOC(rGO) for enhancing electromagnetic wave absorption performance in C band

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

Ceramics International Pub Date : 2025-06-01 DOI:10.1016/j.ceramint.2025.02.238

Pei Feng , Hanjun Wei , Xinlei Pan , Xiaolong Wei , Yuliang Li , Yuhua Shi , Dayong Jiang , Ling Lu , Weifeng He

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引用次数: 0

Abstract

Stealth aircrafts should be designed with full consideration of different frequency detection threats. Therefore, in order to cope with the challenges posed by the fire-control radar detection system in C band, an impedance matching optimized structure based on rGO modified PDCs-SiOC is designed to induce in situ heterophase SiO₂/SiCnws and construct a three-dimensional (3D) conductive network. By adjusting the doping ratio of PKG, not only skeleton support can be provided to induce the growth of porous coral-shaped ceramics, but also the surface defect of rGO can be used as the active site to induce the in-situ growth of amorphous SiO₂/crystalline SiC nanowires to construct a gradient dielectric network structure. The results show that the SiOC(rGO)-SiO₂/SiCnws possess superior electromagnetic wave absorption absorbing properties when the PKG doping ratio is 50 wt%, with a minimum reflection loss (RL_min) of −31.2 dB at 4.08 GHz and an effective absorbing bandwidth (EAB) of 2.31 GHz of C band at a thickness of 3.7 mm. Through the synergistic effect of interface polarization, dipole polarization and conduction loss, the high efficiency absorption of electromagnetic wave in C band at low frequency is enhanced.

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原位生长的异相SiO2/ sicws在PDCs-SiOC（rGO）中增强C波段电磁波吸收性能

隐身飞机的设计应充分考虑不同频率的探测威胁。因此，为了应对C波段火控雷达探测系统的挑战，设计了一种基于还原氧化石墨烯改性PDCs-SiOC的阻抗匹配优化结构，原位诱导异相SiO2/SiCnws并构建三维（3D）导电网络。通过调整PKG的掺杂比例，不仅可以提供骨架支撑来诱导多孔珊瑚状陶瓷的生长，还可以利用还原氧化石墨烯的表面缺陷作为活性位点诱导非晶SiO2/晶体SiC纳米线的原位生长，构建梯度介电网络结构。结果表明，当PKG掺杂比为50 wt%时，SiOC(rGO)-SiO2/SiCnws具有优异的电磁波吸收性能，在4.08 GHz处的最小反射损耗（RLmin）为- 31.2 dB，在厚度为3.7 mm的C波段的有效吸收带宽（EAB）为2.31 GHz。通过界面极化、偶极极化和传导损耗的协同作用，增强了C波段低频电磁波的高效吸收。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.