Efficient microwave absorption achieved through in situ construction of core-shell Co Fe_(2)O_(4)@mesoporous carbon hollow spheres

作     者：Lianggui Ren Yiqun Wang Xin Zhang Qinchuan He Guanglei Wu Ren Lianggui;Wang Yiqun;Zhang Xin;He Qinchuan;Wu Guanglei

作者机构：College of Materials and Chemistry&Chemical EngineeringChengdu University of TechnologyChengdu 610059China Institute of Materials for Energy and EnvironmentState Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2023年第30卷第3期

页      面：504-514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] 

基　　金：supported by the National Natural Science Foundation of China(No.51407134) the Sichuan Science and Technology Program(No.2021108) the Natural Science Foundation of Shandong Province(No.ZR2019YQ24) the Taishan Scholars and Young Experts Program of Shandong Province 

主　　题：porous core-shell structure microwave absorption interface polarization ferrite structure-controllable 

摘      要：Cobalt ferrite(CoFe_(2)O_(4)),with good chemical stability and magnetic loss,can be used to prepare composites with a unique structure and high *** this study,CoFe_(2)O_(4)@mesoporous carbon hollow spheres(MCHS)with a core-shell structure were prepared by introducing CoFe_(2)O_(4)magnetic particles into hollow mesoporous carbon through a simple in situ ***,the microwave absorption performance of the CoFe_(2)O_(4)@MCHS composites was *** and dielectric losses can be effectively coordinated by constructing the porous structure and adjusting the ratio of MCHS and CoFe_(2)O_(4).Results show that the impedance matching and absorption properties of the Co Fe_(2)O_(4)@MCHS composites can be altered by tweaking the mass ratio of MCHS and CoFe_(2)O_(4).The minimum reflection loss of the Co Fe_(2)O_(4)@MCHS composites reaches-29.7 dB at 5.8 *** addition,the effective absorption bandwidth is 3.7 GHz,with the thickness being 2.5 *** boosted microwave absorption can be ascribed to the porous core-shell structure and introduction of magnetic *** coordination between the microporous morphology and the core-shell structure is conducive to improving the attenuation coefficient and achieving good impedance *** porous core-shell structure provides large solid-void and CoFe_(2)O_(4)-C interfaces to induce interfacial polarization and extend the electromagnetic waves’multiple scattering and ***,natural resonance,exchange resonance,and eddy current loss work together for the magnetic *** method provides a practical solution to prepare core-shell structure microwave absorbents.