化工矿物与加工2025，Vol.54Issue(2)：52-58,7.DOI:10.16283/j.cnki.hgkwyjg.2025.02.007
粉煤灰空心微珠@碳纳米管的吸波性能研究
Study on the wave-absorbing properties of fly ash cenospheres@carbon nanotubes
摘要
Abstract
Fly ash is a granular material formed by the melting and oxidation of inorganic minerals in coal at high temperature during coal combustion.The annual emission of fly ash in China exceeds 800 million tons,and hollow microspheres(CSs)are one of the components with the highest added value.In this study,carbon nanotubes(CNTs)were grown in situ on the surface of CSs by CVD method using CSs as raw materials and ethylene as carbon source gas.Porous hollow microspheres@carbon nanotubes(CSs@CNTs)microspheres with certain microwave absorption properties were prepared,and their microstructure and microwave absorption properties were investigated.The results show that the surface of CSs@CNTs microspheres is covered with a layer of thin fluffy wrinkled CNTs,and the dia-meter of CNTs is about 30 nm.The reflection loss of CSs@CNTs microspheres reaches-20.29 dB at 9.12 GHz with a matching thickness of 4.4 mm,and the effective absorption bandwidth below-10 dB is 5 GHz.The unique porous hollow structure of CSs@CNTs microspheres increases the multiple reflection of electromagnetic wave in the material and optimizes the impedance matching.In addition,under the synergistic effect of electrical loss and magnetic loss,the electromagnetic absorption effect of CSs@CNTs microspheres can be further enhanced by increasing the attenuation constant of electromagnetic wave.关键词
粉煤灰/空心微珠/电磁波/吸波性能/阻抗匹配/磁损耗Key words
fly ash/hollow microspheres/electromagnetic wave/absorbing performance/impedance matching/magnetic loss分类
环境科学引用本文复制引用
张晓民,党小来,高红洁,陈天星,刘佳博,李嘉晨,刘晨曦,李修身..粉煤灰空心微珠@碳纳米管的吸波性能研究[J].化工矿物与加工,2025,54(2):52-58,7.基金项目
陕西省重点研发计划项目(2024GX-YBXM-420) （2024GX-YBXM-420）
咸阳市科技局重点研发计划项目(2021ZDYF-GY-0034) （2021ZDYF-GY-0034）
西安建筑科技大学2023年大学生创新创业国家级项目(202310703003). （202310703003）
