Synthesis of SiOC@C ceramic nanospheres with tunable electromagnetic wave absorption performance  

作　　者：Junjie Qian Dandan Ma Xiaoling Zhou Huoming Liao Qingliang Shan Shaohua Wang Yongqing Wang Xiaojun Zeng 

机构地区：[1]School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China [2]School of Mechanical and Electronic Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China [3]School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Journal of Advanced Ceramics》2024年第9期1394-1408,共15页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52360018);the Shiyanjia Lab(www.shiyanjia.com)for the support of thermogravimetric(TG)tests.

摘　　要：SiOC-based ceramics are considered promising electromagnetic wave-absorbing materials because of their lightweight,high-temperature resistance,and heat insulation properties.Herein,SiOC@C ceramic nanospheres were prepared using a liquid-phase method combined with a polymer-derived ceramic(PDC)method,followed by heat treatment in N_(2) and Ar atmospheres at different temperatures.The morphology,microstructure,phase composition,and electromagnetic wave absorption performance of the SiOC@C ceramic nanospheres were investigated in detail.The SiOC@C ceramic nanospheres obtained in the Ar atmosphere showed a minimum reflection loss(RL_(min))of−67.03 dB,whereas the SiOC@C ceramic nanospheres obtained in the N_(2) atmosphere exhibited an RLmin value of−63.76 dB.The outstanding electromagnetic wave absorption performance of the SiOC@C ceramic nanospheres was attributed to the synergistic effect between conductive loss,interfacial/defect polarization loss,multiple reflections,and scattering.Therefore,this research provides valuable insights into the design and fabrication of SiOC ceramic-based electromagnetic wave absorbers.

关 键 词：SiOC ceramic nanospheres electromagnetic wave absorption performance polymer-derived ceramics(PDCs) free carbon 

分 类 号：TQ427.26[化学工程]