SrFe12O19/Ag3PO4 纳米复合物的微波吸收性能
打开文本图片集
中图分类号：TB333 文献标志码：A doi：10.12415/j.issn.1671-7872.24123
Microwave Absorption Properties of SrFe12O19/Ag3PO4 Nonocomposites
CUI Caiyun'， YAN Mingwen²， ZHANG Jiaxue1， HAN Shichang1 （1. School of Mechanical Engineering， Wanjiang University of Technology，Maanshan ， China; . Construction and Installation Engineering Technology Branch， China MCC17 Group Co.，Ltd.， Maanshan ， China）
Abstract：To address the potential hazards of electromagnetic radiation and interference on electronic equipment operation and potential harm， M-type hexagonal strontium ferrite （SrFe12O19） nanosheets were prepared by the hydrothermal method， and a series of SrFe12O19/Ag3PO4 nanocomposites were synthesized by depositing different amounts of silver phosphate （Ag3PO4，⋅ ） nanoparticles onto the strontium ferrite surfaces through an ion-exchange process. The crystal structure and micromorphology of the materials were characterized by X ray difraction （XRD） and scanning electron microscope （SEM）， while the magnetic properties and electromagnetic wave absorption performance were evaluated using a vibrating sample magnetometer （VSM） and vector network analyzer （VNA）， respectivelytoinvestigate theeffect of different amounts of silver phosphateattachment on the microwave absorption properties of the nanocomposites.The results indicate that Ag3PO4 nanoparticles are uniformly distributed onthe hexagonal strontium ferite sheets， with their loading density significantly increasing at higher Ag3PO4 concentrations. When the Ag3PO4 mass fraction is 3% with an absorbing coating thickness of 5.0mm ， the minimum reflection loss reaches -23.6 dB at 7.3GHz .Increasing the coating thickness to 5.5mm yieldsan effective absorption bandwidth （reflection loss <-5.0dB of 4.0GHz （3.9-7.9GHz） ，confirming that the SrFe12O19/Ag3PO4 nanocomposites exhibit outstanding microwave absorption performance and promising application prospects in this field.
Keywords： nanocomposite； M-type strontium ferrite; Ag3PO4 ；hydrothermal method;iron exchange method; microwave absorption; electromagnetic screen
电磁技术自取得突破以来已广泛应用于诸多领域，包括通信领域的5G技术、新能源领域的光伏发电和风力发电、交通运输领域的磁悬浮列车，以及医学领域的核磁共振成像[-2]。（剩余14940字）