新型炭材料2020，Vol.35Issue(4)：428-435,8.DOI:10.1016/S1872-5805(20)60500-5
沉积温度对纳米碳管-铁粒子复合物的制备及吸波性能影响
Effects of the deposition temperature on the microwave-absorption performance of Fe/CNT composites
摘要
Abstract
Iron coated carbon nanotube ( CNT) nanocomposite absorbents were prepared by a metal organic chemical vapor depo-sition method using carbonyl iron as the Fe precursor. The microstructures and electromagnetic properties of the composites were characterized by XRD, FESEM, TEM, and a vector network analyzer. Results show that the morphology and microwave absorption properties of these core-shell composites are controlled by changing the deposition temperature. The number of iron nanoparticles de-posited on the surface of the CNTs gradually increases with increasing deposition temperature in the range 210-240 ℃. Too high a temperature (270 ℃) causes agglomeration of the Fe nanoparticles on the surface of the CNTs. When the thickness of the electro-magnetic coating is 2. 9 mm, the composite prepared at 240 ℃ has the best microwave absorption, with a maximum absorption bandwidth of 6. 1 GHz (10. 2-16. 3 GHz), a minimum reflectivity of -28. 3 dB and an absorption intensity less than -10 dB at 6. 1 GHz.关键词
碳纳米管/原位生长/吸波性能Key words
Carbon nanotubes/In-situ growth/Electromagnetic wave absorption分类
通用工业技术引用本文复制引用
刘渊,赖杰,师金锋..沉积温度对纳米碳管-铁粒子复合物的制备及吸波性能影响[J].新型炭材料,2020,35(4):428-435,8.基金项目
重庆市基础科学与前沿技术研究专项资助(cstc2017jcyjAX0078). Chongqing Basic Science and Frontier Technology Research Special Support (cstc2017jcyjax0078). （cstc2017jcyjAX0078）
