Electromagnetic wave absorbing properties of glucose-derived carbon-rich SiOC ceramics annealed at different temperatures

被引：46

作者：

Du, Bin ^{[1
]}

He, Chao ^{[1
]}

Qian, Junjie ^{[1
]}

Cai, Mei ^{[1
]}

Wang, Xuan ^{[1
]}

Shui, Anze ^{[1
]}

机构：

[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2019年 / 102卷 / 11期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

absorbents; glass-ceramics; glucose; silicon oxycarbide; MICROWAVE-ABSORPTION PROPERTIES; X-BAND; STRUCTURAL-CHARACTERIZATION; FABRICATION; COMPOSITE; PERMITTIVITY; PRECURSORS; BEHAVIOR; ZNO;

D O I：

10.1111/jace.16549

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A kind of glucose-derived carbon-rich silicon oxycarbide (glucose-SiOC) nanocomposite with excellent electromagnetic wave absorbing performance is obtained via solvothermal method, and then pyrolyzed at high temperature (1300 degrees C and 1400 degrees C) under argon atmosphere. The structural evolutions and the electromagnetic wave absorbing capabilities of the nanocomposites have been systematically investigated. The resultant 3 mol/L glucose-SiOC ceramic exhibits a heterostructure, in which nanosized glucose-derived carbon and SiC particles decorate on amorphous SiOC network. Benefitting from the nanosized carbon, SiC particles and the heterostructure attributes, the 3 mol/L glucose-SiOC ceramic displays a strong electromagnetic wave-absorbing property. The minimum reflection coefficient of the 3 mol/L glucose-SiOC ceramic pyrolyzed at 1400 degrees C reaches -27.6 dB at 13.8 GHz. The widest effective absorption bandwidth attains 3.5 GHz in K mu-band. This work opens up a novel and simple route to fabricate polymer-derived ceramics with excellent electromagnetic wave-absorbing performance.

引用

页码：7015 / 7025

页数：11

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