Tunable and efficient microwave absorption from mesophase pitch carbide with designable electromagnetic properties

作     者：Junyu Lu Haoruo Zhang Yang Chen Mushan Yuan Mei Liang Zhengguang Heng Huawei Zou Junyu Lu;Haoruo Zhang;Yang Chen;Mushan Yuan;Mei Liang;Zhengguang Heng;Huawei Zou

作者机构：The State Key Lab of Polymer Materials EngineeringPolymer Research Institute of Sichuan UniversityChengdu 610065China School of New Energy and Materials EngineeringSouthwest Petroleum UniversityChengdu 610500China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2023年第28卷第10期

页      面：222-235页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by Sichuan Science and Technology Program,Grant No.2022YFG0111 the Postdoctoral Innovative Talent Support Program(Grant No.BX20190220) the State Key Laboratory of Polymer Materials Engineering(Grant No.sklpme2019-2-02)for financial support。 

主　　题：Microwave absorption Mesophase pitch Broadband Dielectric loss Interfacial polarization 

摘      要：In order to obtain the microwave absorption(MA)materials with light weight,high efficiency and tunable properties,the carbonized mesophase pitch(CMP)with the variation in carbonization temperatures and particle sizes were prepared and characterized.The carbonization temperature mainly controlled the graphitization degree of the CMP to affect their conductive loss.The carbon residues were generated on the CMP surface when the temperature was higher than 700℃,which contributed significantly to the polarization loss of the CMP.For scale regulation,the segregation between the particles in the paraffin ring caused by the reduction particles of CMP carbonization at 750℃(750 CMP)resulted in a significant reduction in conductive losses while improving their impedance matching.The 750 CMP over 300 mesh sieved had the strongest MA properties of-53 d B at 3.4 GHz within 5.5 mm.Moreover,the prepared CMPs were multi-layer compounded and optimized by CST microwave studio.The synergistic effect derived from the improved impedance matching and the enhanced interfacial polarization resulted in significant reflection loss in multi-layer CMP.Overall,these findings lead to the systematically regulation of carbon-based materials for MA,showing an attractive application prospect for the preparation of high-performance MA materials.