文献类型：期刊文献

英文题名：The combined sol-gel and ascorbic acid reduction strategy enabling Ba2Co2Fe12O22 hexaferrite/graphene composite with enhanced microwave absorption ability

作者：He, Yu[1];Wang, Ruoqi[1];Wu, Xiaohan[1];Tang, Chuanhao[1];Qian, Jun[1];Zuo, Peiyuan[1];Zhuang, Qixin[1];Liu, Xing[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Special Funct Polymer Mat & Related Techno, Minist Educ, Shanghai 200237, Peoples R China;[2]Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

年份：2024

卷号：174

外文期刊名：MATERIALS RESEARCH BULLETIN

收录：;EI(收录号：20240615518901);WOS:【SCI-EXPANDED(收录号:WOS:001179908000001)】；

基金：All authors are grateful for financial support from the National Natural Science Foundation of China (52073091, 52303083, 52373073, 22171086) , Shanghai Pujiang Program (22PJ1402500) and Key Labo- ratory of Special Functional Polymeric Materials and Related Technol- ogy (Ministry of Education) .

语种：英文

外文关键词：Microwave absorption properties; Reduced graphene oxide; Reflection loss

摘要：The inherent high conductivity and limited loss mechanism of graphene result in an impedance mismatch with free space impedance. Co2Y-type ferrite exhibits strong planar magnetic anisotropy and a high natural resonance frequency compared to other ferrites. Therefore, the utilization of Co2Y-type ferrite magnetic particles to impart magnetic loss capability to graphene is considered an effective strategy for enhancing electromagnetic wave absorption efficiency. Ferrite/RGO composite material with excellent microwave absorption properties was synthesized by coupling sol-gel derived Ba2Co2Fe12O22 hexaferrite with graphene oxide, followed by reduction using ascorbic acid. More noticeably, the ferrite particles stably adhere to the surface or interlayer of graphene through adsorption, while the reduced graphene oxide with residual oxygen -containing functional groups simultaneously enhances the dielectric loss. The proper mass ratio of graphene oxide to ferrite particles (1:2) and optimized electromagnetic parameters endow the microwave absorbing materials with a minimum reflection loss value of approximately -45.25 dB and an effective bandwidth of around 4.75 GHz. The simulation calculations are further investigated to verify the practical application of this absorber. Accordingly, we therefore conclude this study provides a new perspective on advanced ferrite/graphene composite based MAMs.