Preparation and Microwave Absorbing Properties of Double-layer Fine Iron Tailings Cementitious Materials

作     者：LI Huawei WANG Rong WANG Yulin LIU Feiyu WANG Qian WEI Muwang LI Huawei;WANG Rong;WANG Yulin;LIU Feiyu;WANG Qian;WEI Muwang

作者机构：School of Civil Engineering and ArchitectureWuyi UniversityWuyishan 354300China Engineering Research Center of Prevention and Control of Geological Disasters in Northern FujianFujian Province Higher Education InstitutesWuyishan 354300China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2023年第38卷第5期

页      面：1126-1135页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Funded by the Natural Science Foundation of Nanping of China(No.N2021J002) Guangdong Basic and Applied Basic Research Foundation(No.2020A1515110304) Guangzhou Science and Technology Plan(No.202102020224) Natural Science Foundation of Fujian Province(No.2020Y0092) Natural Science Foundation of Fujian Province(No.2023J011044) Resource Chemical Industry and Technology Foundation of Nanping(No.N2020Z003) 

主　　题：microwave absorbing properties iron tailings electromagnetic parameters single-layer structure double-layer structure impedance matching 

摘      要：To develop the microwave absorbing(MA)properties of cementitious material mixed with mine solid waste,the iron tailings cementitious microwave absorbing materials were *** iron tailings was treated into different particle sizes by planetary ball mill,and the physicochemical properties of iron tailings were tested by laser particle size analyzer and scanning electron microscope(SEM).The electromagnetic parameters of iron tailings cementitious materials were characterized by a vector network analyzer and simulated MA properties,and the MA properties of iron tailings-cement composite system with steel fiber as absorber was *** on the design of the single-layer structure,optimum mix ratio and thickness configuration method of double-layer structure were further studied,meanwhile,the mechanical properties and engineering application were analyzed and *** results show that the particle size of iron tailings can afiect its electromagnetic behavior in cementitious materials,and the smaller particles lead the increase of demagnetisation efiect induced by domain wall motion and achieve better microwave absorbing properties in cementitious *** the thickness of matching layer and absorbing layer is 5 mm,the optimized microwave absorbing properties of C1/C3 double-layer cementitious material can obtain optimal RL value of-27.61 dB and efiective absorbing bandwidth of 0.97 GHz,which attributes to the synergistic efiect of impedance matching and attenuation *** double-layer microwave absorbing materials obtain excellent absorbing properties and show great design flexibility and diversity,which can be used as a suitable candidate for the preparation of favorable microwave absorbing cementitious materials.