Porous SiCNnw/C/Si3N4 ceramics with controlled component and structure for electromagnetic wave absorption

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-01-22 DOI:10.1016/j.compositesb.2025.112164

Jialin Bai , Zhuocheng Xie , Pengfei Zhang , Shichao Wang , Zehua Liu , Xiumin Yao , Xuejian Liu , Zhengren Huang

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引用次数: 0

Abstract

Ceramic–based electromagnetic wave (EMW) absorbing materials with lightweight characteristics and strong absorption properties can effectively reduce EMW pollution and interference. A simple technique for introducing wave–absorbing phases with multi–component and multi–microstructure in wave–transmitting ceramic matrices is essential for practical applications. Herein, porous SiCN_nw/C/Si₃N₄ ceramics comprising a two–component absorbing phase with a heterogeneous interface and nanowire structure have been prepared via simple vacuum impregnation and heat treatment. Porous Si₃N₄ ceramics with low permittivity are used as the impedance matching matrix, while carbon layer and SiCN nanowires are used as wave loss phases. The heterogeneous interface between the carbon layer and Si₃N₄ and the nanowire structure of SiCN can enhance the polarization relaxation behavior and electron transport capacity in the material. The conversion of carbon into SiCN nanowires can be promoted by elevating the heat treatment temperature, which can effectively regulate the ratio of the two wave–absorbing phases, thus optimizing the impedance matching and realizing efficient EMW absorption. The prepared C1400/20 sample has a minimum reflection loss of −61.24 dB at a thickness of 2.77 mm and an effective absorption bandwidth (EAB) of 6.30 GHz at a thickness of 2.63 mm. The C1400/25 realizes an EAB of 5.61 GHz at a smaller thickness of 2.09 mm. Overall, this study provides new ideas for designing ceramic–based materials with excellent EMW absorption performance.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.