SrFe12O19/Ag3PO4 納米復(fù)合物的微波吸收性能
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中圖分類號：TB333 文獻(xiàn)標(biāo)志碼：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
電磁技術(shù)自取得突破以來已廣泛應(yīng)用于諸多領(lǐng)域，包括通信領(lǐng)域的5G技術(shù)、新能源領(lǐng)域的光伏發(fā)電和風(fēng)力發(fā)電、交通運(yùn)輸領(lǐng)域的磁懸浮列車，以及醫(yī)學(xué)領(lǐng)域的核磁共振成像[-2]。（剩余14940字）