FeCoNiAl@C/CCB/NR吸波贴片的制备及微波吸收性能  

Fabrication and microwave absorbing properties ofFeCoNiAl@C/CCB/NR absorbing patches

作　　者：申永前[1,2] 宋鹏飞 韦丽君 张桂彬 高峰 杜雪岩 SHEN Yongqian;SONG Pengfei;WEI Lijun;ZHANG Guibin;GAO Feng;DU Xueyan(College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Shouhang Hi-Tech Energy Technology Co.Ltd.,Jiuquan 735000,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]首航高科能源技术股份有限公司,甘肃酒泉735000

出　　处：《功能材料》2024年第9期9118-9126,共9页Journal of Functional Materials

基　　金：甘肃省重点研发计划(23YFGA0065);中国博士后科学基金(2022MD713777);国家自然科学基金-联合基金项目(U22A20175);甘肃省科技重大专项(22ZD6GA008)。

摘　　要：近年来,橡胶吸波贴片由于具有优异的力学性能和吸波性能被广泛应用于各种电子设备,确保设备免受电磁波干扰而正常运行。采用机械搅拌法、碳热还原法以及密炼和硫化等工艺制备了具有优异力学性能和吸波性能的FeCoNiAl@C/导电炭黑(CCB)/天然橡胶(NR)吸波贴片,并调节FeCoNiAl@C的添加量,以调控贴片的力学性能和吸波性能。对FeCoNiAl@C复合材料的物相组成和微观形貌进行表征,并研究了吸波贴片微波吸收性能和吸波机理。结果表明,当FeCoNiAl@C添加量为5.0 g时,FeCoNiAl@C/CCB/NR吸波贴片在4.40 GHz、厚度5.0 mm处最小反射损耗(RL)可达-24.45 dB,有效吸收带宽(EAB)达到1.60 GHz;当厚度为1.5 mm时,EAB可达到3.04 GHz。吸波贴片良好的吸波性能源于吸波剂优异的阻抗匹配和多重损耗的协同作用。此研究为天然橡胶基吸波贴片的结构设计和实际应用提供了新的思路。In recent years,rubber wave-absorbing patches have been widely used in various electronic devices due to their excellent mechanical and wave-absorbing properties,ensuring the normal operation of equipment without electromagnetic(EM)interference.This article employs mechanical stirring,carbothermal reduction,as well as mastication and vulcanization processes to prepare FeCoNiAl@C/conductive carbon black(CCB)/natural rubber(NR)wave-absorbing patches with superior mechanical and wave-absorbing properties,and adjusts the addition amount of FeCoNiAl@C to regulate the mechanical and wave-absorbing properties of the patches.The phase composition and microstructure of the FeCoNiAl@C composite material were characterized,and the microwave absorption performance and wave-absorbing mechanism of the patches were studied.The results show that when the addition amount of FeCoNiAl@C is 5.0 g,the FeCoNiAl@C/CCB/NR wave-absorbing patch exhibits a minimum reflection loss(RL)of-24.45 dB at 4.40 GHz and a thickness of 5.0 mm,with an effective absorption bandwidth(EAB)of 1.60 GHz.When the thickness is 1.5 mm,the EAB can reach 3.04 GHz.The excellent wave-absorbing performance of the patch is attributed to the excellent impedance matching of the absorber and the synergistic effect of multiple loss mechanisms.This work provides new insights for the structural design and practical application of natural rubber-based wave-absorbing patches.

关 键 词：吸波材料 天然橡胶 FeCoNiAl合金 吸波机理 

分 类 号：TB332[一般工业技术—材料科学与工程]