Co_(0.5)Zn_(0.5)Fe_(2)O_(4)modified residual carbon as an excellent microwave absorber  

作　　者：Yuanchun Zhang Dacheng Ma Xingzhao Zhang Chuanlei Zhu Shengtao Gao 

机构地区：[1]School of Chemical and Blasting Engineering,Anhui University of Science and Technology,Huainan 232001,China [2]Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining,Anhui University of Science and Technology,Huainan 232001,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第3期534-545,共12页矿物冶金与材料学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52200139);the Open Research Grant of Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining,China(No.EC2023013);the Scientific Research Foundation for the Introduction of Talent in Anhui University of Science and Technology,China(No.2023yjrc79).

摘　　要：Microwave absorbers have great potential for military and civil applications.Herein,Co_(0.5Z)n_(0.5)Fe_(2)O_(4)/residual carbon(CZFO/RC)composites have been successfully prepared using a hydrothermal method.RC was derived from coal gasification fine slag(CGFS)via pickling,which removes inorganic compounds.Multiple test means have been used to study the chemical composition,crys-tal structure,and micromorphology of the CZFO/RC composites,as well as their electromagnetic parameters and microwave absorption(MA)properties.The CZFO/RC composites exhibit excellent MA performance owing to their dielectric and magnetic losses.When the thickness of CZFO/RC-2(FeCl_(3)·6H_(2)O of 0.007 mol,ZnCl_(2)of 0.00175 mol,and CoCl_(2)·6H_(2)O of 0.00175 mol)is 1.20 mm,the minimum reflection loss(RL_(min))is-56.24 dB,whereas at a thickness of 3.00 mm and 6.34 GHz,RL_(min) is-45.96 dB and the maximum effective ab-sorption bandwidth is 1.83 GHz(5.53-7.36 GHz).Dielectric loss includes interface and dipole polarizations,while magnetic loss includes current and remnant magnetic loss.CZFO/RC-2 exhibits high impedance matching,allowing microwave to enter the absorber.The com-puter simulation technology confirms that CZFO/RC-2 considerably decreases the radar cross-section.This study can be used to promote the use of CGFS as electromagnetic wave(EMW)-absorbing materials.

关 键 词：cobalt-zinc ferrite residual carbon microwave absorption coal gasification fine slag coal-based solid waste 

分 类 号：TB34[一般工业技术—材料科学与工程]