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论文类型： 期刊论文

发表时间： 2018-06-01

发表刊物： MATERIALS RESEARCH BULLETIN

收录刊物： SCIE、EI

卷号： 102

页面范围： 153-159

ISSN号： 0025-5408

关键字： Nanostructures; Magnetic properties; Dielectric properties; Transmission electron microscopy (TEM); Chemical synthesis

摘要： Multiwalled carbon nanotubes (MWCNTs) were fabricated via the detonation of a mixed gas consisting of ferrocene vapor, methane, and oxygen. The samples were characterized using transmission electron microscopy, X-ray diffraction, Raman spectroscopy, vibrating sample magnetometry, and a vector network analyzer. The results indicate that the samples were MWCNTs that were about 30 nm in external diameter, about 15 nm in inner diameter. The ferrocene dosage had an obvious effect on the morphology, degree of graphitization, and magnetic property of the MWCNTs. The growth mechanism of the MWCNTs in the gaseous detonation process was discussed using the detonation Zeldovich-von Neumann-Doring model and a vapor-liquid-solid growth model. The minimum reflection loss of the MWCNTs was -6.1 dB at 11.2 GHz with a thickness of 2 mm, which is lower than that of the MWCNTs prepared via other methods, and the reasons for this result are analyzed in the paper.