轻质蜂窝状氮掺杂介孔碳/钴/氧化亚钴复合吸波材料制备及宽频吸波性能研究  

Construction of Lightweight Honeycomb-like Nitrogen-doped Mesoporous Carbon/Cobalt/Cobaltons Oxide Composites and Wideband Absorbing Properties

作　　者：韦智恒 李宗乘 梁瑾 Wei Zhiheng;Li Zongcheng;Liang Jin(Key Laboratory of Flexible Electronics of Zhejiang Province,Ningbo Institute of Northwestern Polytechnical University,Ningbo 315103,China;Shaanxi Key Laboratory of Macromolecular Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学宁波研究院浙江省柔性电子重点实验室,浙江宁波315103 [2]西北工业大学陕西省高分子科学与技术重点实验室,陕西西安710072

出　　处：《航空科学技术》2024年第8期64-71,共8页Aeronautical Science & Technology

基　　金：国家自然科学基金(22205182);航空科学基金(2020Z056053002)。

摘　　要：传统吸波材料因无法满足现代科技对隐身技术材料“轻质、厚度薄、强损耗、宽吸收”的需求,因而开发高效吸波材料成为隐身技术发展的关键。本文以蜂窝状多孔碳与钴盐分别为碳基体和磁性金属源,通过沉淀法联合热解工艺,获得了蜂窝状氮掺杂碳/钴/氧化亚钴磁电复合吸波材料。蜂窝状孔结构极大地降低了吸波剂的密度,赋予其轻质的特性。磁性组分的引入优化了阻抗匹配,介电和磁性组分形成的磁电协同损耗增强了复合材料对电磁波的吸收强度并拓宽了吸波频带。得益于成分与结构优势,该材料在填充量仅为5wt%时,2.5mm匹配厚度下的反射损耗峰值达到-52.84dB,在2.7mm厚度下的有效吸收带宽达到4.83GHz。The traditional microwave absorbing materials cannot meet the requirements of modern technology for stealth technology materials,such as“light weight,thin thickness,strong loss,wide absorption”,so the development of efficient microwave absorbing materials has become the key to the development of stealth technology.In this paper,honeycomb nitrogen doped carbon/cobalt/cobalt oxide magnetoelectric composite microwave absorbing materials were obtained by precipitation combined pyrolysis process using honeycomb porous carbon and cobalt salt as carbon matrix and magnetic metal source,respectively.The honeycomb pore structure greatly reduces the density of the absorbing agent and endows it with lightweight characteristics.The introduction of magnetic components optimizes the impedance matching,and the magnetoelectric synergistic loss formed by dielectric and magnetic components enhances the electromagnetic wave absorption strength of the composite and widens the wave absorption band.Thanks to the advantages of composition and structure,when the filling amount is only 5wt%,the reflection loss peak at 2.5mm matching thickness reaches-52.84dB,and the effective absorption bandwidth at 2.7mm thickness reaches 4.83GHz.

关 键 词：轻质 介孔碳 CoO/Co磁性颗粒 多重损耗机制 雷达吸波 

分 类 号：V257[一般工业技术—材料科学与工程]