氮掺杂碳纳米管原位封装磁性粒子异质结构(Fe_(3)O_(4)@NCNTs)及其轻质宽频吸波性能  

Microwave Absorption Performance of Encapsulated Magnetic Particles With Nitrogen-Doped Carbon Nanotubes Fe_(3)O_(4)@NCNTs

作　　者：徐东卫 张明举 申志豪 夏晨露 徐京满 郭晓琴[1] 熊需海 陈平[3] XU Dongwei;ZHANG Mingju;SHEN Zhihao;XIA Chenlu;XU Jingman;GUO Xiaoqin;XIONG Xuhai;CHEN Ping(School of Material Science and Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;Liaoning Key Laboratory of Advanced Polymer Matrix Composites,Shenyang Aerospace University,Shenyang 110136,China;State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]郑州航空工业管理学院材料学院,郑州450046 [2]沈阳航空航天大学材料科学与工程学院,沈阳110136 [3]大连理工大学精细化工国家重点实验室,大连116024

出　　处：《材料研究学报》2024年第6期430-436,共7页Chinese Journal of Materials Research

基　　金：河南省青年基金(232300420332);河南省高校重点科研项目(23A430006);郑州航院青年科研专项(23ZHQN01005);国家自然科学基金(51873109);辽宁省兴辽英才计划-创新领军人才项目(XLYC1802085)。

摘　　要：用一步热解工艺制备氮掺杂碳纳米管原位封装金属粒子异质结构(Fe_(3)O_(4)@NCNTs),使用粉末X射线衍射(XRD)、拉曼光谱、扫描电镜(SEM)和透射电镜(TEM)等手段表征其结构和物相组成,基于同轴法测试其电磁参数并用Matlab模拟反射损耗。结果表明:煅烧温度和原料比例对氮元素掺杂磁功能化碳纳米管复合材料的微波吸收性能有重要的影响。当原料比例(金属盐/碳源)为2∶1时,煅烧温度为750℃、低填充量为10%的复合材料具有最优异的吸波性能,其最小反射损耗(RLmin)为-57.7 dB,匹配厚度为2.0 mm时,有效吸收带宽(EAB)达到6.4 GHz。One-dimensional carbon nanotubes(CNTs)have made them candidate as lightweight broadband microwave absorption material due to their intrinsic high electrical conductivity,light weight,and high specific surface area etc.In this paper,heterostructures of magnetic particels of iron oxide encapsulated with nitrogen-doped carbon nanotubes(Fe_(3)O_(4)@NCNTs)have been successfully constructed in-situ by one-step pyrolysis process.The phase composition and structure of the composites were characterized by powder X-ray diffraction(XRD),Raman spectroscopy,scanning electron microscopy(SEM)and transmission electron microscopy(TEM),respectively.The electromagnetic parameters were measured by coaxial method and the reflection loss was simulated by Matlab.The results show that the calcination temperatures and the raw material ratio have important effect on the microwave absorption properties of nitrogen-doped magnetic functionalized carbon nanotube composites.The results demonstrated that when the calcination temperature was 750oC and the raw material ratio(metal salt/carbon source)is 2:1,the Fe_(3)O_(4)@NCNTs-750 hybrids with only 10%of functional fillers reached a minimum reflection loss value of-57.7 dB and a maximum effective absorption bandwidth(EAB,below-10 dB)of 6.4 GHz at 2.0 mm.

关 键 词：复合材料 碳纳米管 催化生长 微波吸收性能 阻抗匹配 

分 类 号：TB332[一般工业技术—材料科学与工程]