二氧化硅/金属镍/有序介孔碳复合材料的制备及其吸波性能研究  

Preparation of silicon dioxide/nickel metal/ordered mesoporouscarbon composites and their microwave absorption properties

作　　者：刘玉申 周潘潘 况亚伟 LIU Yushen;ZHOU Panpan;KUANG Yawei(School of Intelligent Manufacturing,Yancheng Polytechnic College,224005,Yancheng;School of Electronic and Information Engineering,Changshu Institute of Technology,215500,Suzhou,Jiangsu,PRC)

机构地区：[1]盐城工业职业技术学院智能制造学院,盐城市224005 [2]常熟理工学院电子信息工程学院,江苏省苏州市215500

出　　处：《曲阜师范大学学报（自然科学版）》2024年第3期1-8,F0002,共9页Journal of Qufu Normal University(Natural Science)

基　　金：国家自然科学基金(62174016).

摘　　要：以苯酚、甲醛、F127、正硅酸乙酯和六水合氯化镍为原料,通过溶剂挥发诱导自组装法和热处理工艺原位合成了二氧化硅/金属镍/有序介孔碳复合材料.通过改变镍粒子的复合量,可以调节材料的石墨化程度、镍纳米颗粒尺寸和磁性,从而优化整体的电磁波吸收性能.采用XRD、Raman、SEM、TEM、XPS和VSM等多种测试手段表征了其相组成、缺陷、形貌、镍纳米粒子的大小、磁性能等基本特性.实验结果表明,增大镍纳米粒子的复合量可以有效提高材料的饱和磁化强度和磁损耗性能,但过大的复合量会引起镍颗粒的团聚,从而削弱界面极化作用.以OS@Ni1.5-700为吸收剂的吸波涂层在4.0 mm厚度下,最小反射损耗值达到-36.5 dB,在更薄的厚度时(2.5 mm),有效吸波频宽拓展到了8.16 GHz(9.36 GHz~17.52 GHz).Using phenol,formaldehyde,F127,ethyl orthosilicate and nickel chloride hexahydrate as raw materials,silica/metallic nickel/ordered mesoporous carbon composites were synthesized in situ through a solvent evaporation-induced self-assembly method and a heat treatment process.By changing the composite amount of nickel particles,the graphitization degree,nickel nanoparticle size and magnetic properties of the composites can be adjusted,thereby optimizing the overall electromagnetic wave absorption performance.The phase composition,defects,morphology,size of nickel nanoparticles,magnetic properties and other basic properties of silica/metallic nickel/ordered mesoporous carbon composites have been characterized using a variety of tests such as XRD,Raman,SEM,TEM,XPS and VSM.The experimental results show that increasing the composite amount of nickel nanoparticles can effectively improve the saturation magnetization and magnetic loss properties of the material,but too large composite amount will cause agglomeration of nickel particles,which will weaken the role of interfacial polarization.Remarkably,OS@Ni1.5-700 exhibits a strong reflection loss value of-36.5 dB with a layer thickness of 4.0 mm and a broad effective absorption bandwidth of 8.16 GHz(9.36 GHz~17.52 GHz)with a layer thickness of only 2.5 mm.

关 键 词：有序介孔碳 磁电协同 吸波 

分 类 号：TM25[一般工业技术—材料科学与工程]