Excellent electromagnetic wave absorption of MOF/SiBCN nanomaterials at high temperature

作     者：Chunjia LUO Peng MIAO Yusheng TANG Jie KONG Chunjia LUO;Peng MIAO;Yusheng TANG;Jie KONG

作者机构：MOE Key Laboratory of Material Physics and Chemistry under ExtraordinaryShaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第11期

页      面：277-291页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the grant from the National Natural Science Foundation of China(No.21875190) Innovation Team of Shaanxi Sanqin Scholars and the Natural Science Basic Research Plan for Distinguished Young Scholar in Shaanxi Province of China(No.2018JC-008) 

主　　题：Electromagnetic wave absorption High temperature resistance Metal-organic framework Polymer-derived ceramics Siliconboron carbonitride 

摘      要：Electromagnetic wave absorbing materials at high-temperature are urgently needed for stealth aircrafts or aero-engines worked in harsh *** this contribution,cobaltcontaining siliconboron carbonitride(MOF/SiBCN)nanomaterials were prepared by pyrolyzing metal–organic framework,*** 2-methylimidazole(ZIF-67),and hyperbranched *** rhombic dodecahedral ZIF-67 and cobalt element promoted in situ formation of dielectric loss phases,including SiC nanocrystals,CoSi nanocrystals and turbostratic *** ZIF-67/SiBCN nanomaterials showed excellent microwave absorption both at room and elevated *** minimum reflection coefficient(RC_(min))was-51.6dB and effective absorption bandwidth(EAB)is 3.93GHz at room *** an elevated temperature of 600℃,the RC_(min) reached-30.29 dB and EAB covered almost the whole X-band(3.95GHz,8.45–12.4GHz).The ZIF-67/SiBCN nanocomposites are promising and useful platform for microwave absorbing materials at *** may shed light on the downstream applications in designing next generation areo-engines and stealth aircrafts.