编号：CDUT-2023-54

标题：Preparation and electromagnetic wave absorption properties of SiC/SiO2 nanocomposites with different special structures

入藏号：WOS:000838176800002

中国科学院文献情报中心期刊分区：材料科学1区/TOP（2022）

本校作者：向忠宁；何秦川*；王益群；许丙坤

来源出版物：APPLIED SURFACE SCIENCE  卷: 599  文献号: 153968

出版年：2022

第一地址：成都理工大学

关键词：Carbon thermal reduction；SiO 2；SiC nanocomposites；Hollow spherical；Reflection loss；Electromagnetic wave absorption

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摘要：The special microscopic morphology and structure of electromagnetic (EM) wave absorbing materials are the key factors affecting their performance of EM wave absorption. In this work, three different special structures of SiO2/SiC nanocomposites (hollow spherical SiO2/SiC composite nanoparticles (HSPs), core-shell SiO2/SiC composite nanofibers (CSFs) and core-shell SiO2/SiC composite nanochains (CSCs)) are successfully prepared by self-assembly technology and high-temperature carbon thermal reduction method in a single crucible. The EM wave absorbing properties of them are investigated. The results show that HSPs have superior EM wave absorbing performance compared to CSCs and CSFs. The HSPs with a low filler loading of 10 wt% exhibit minimum reflection loss (RLmin) of -52.73 dB at 14.50 GHz with a thickness of 2.64 mm. Moreover, the maximum effective absorption bandwidth (EABmax) is up to 7.79 GHz (10.21-18 GHz) under a corresponding thickness of 2.62 mm. The special hollow spherical structure not only provides a large number of interfaces to enhance interfacial polarization, but also improves impedance matching characteristics, resulting in excellent EM wave absorption performance of HSPs. Thus, this work provides a reference for the structural design of an ideal EM wave absorber.

文章链接地址: https://linkinghub.elsevier.com/retrieve/pii/S0169433222015100