Title :
Alignment of Fe3O4-carbon coaxial nanofibres in a polymer for improving microwave absorption
Author :
Chen, Qianwang ; Chen, Yao ; Cao, Fangyu
Author_Institution :
Dept. of Mater. Sci. & Eng., Univ. of Sci. & Technol. of China, Hefei
Abstract :
A composite with highly aligned array of Fe3O4/CNT coaxial nanofibres in poly (methyl methacrylate) matrix has been fabricated under low magnetic field. The structure and microwave absorption properties of the product were investigated using various techniques, such as field emission scanning electron microanalysis, transmission electron microscopy and vector network analyzer. It was found that microwave absorption of the magnetically aligned composite at 8.5-12.5 GHz was evidently enhanced, comparing with the composite without magnetic treatment. The enhancement mechanism is also discussed based on magnetization theory.
Keywords :
carbon fibres; carbon nanotubes; electromagnetic wave absorption; field emission electron microscopy; filled polymers; iron compounds; magnetisation; microwave materials; nanotechnology; scanning electron microscopy; transmission electron microscopy; C; Fe3O4; Fe3O4-C; carbon coaxial nanofibres; field emission scanning electron microanalysis; frequency 8.5 GHz to 12.5 GHz; magnetically aligned composites; magnetization theory; microwave absorption properties; poly (methyl methacrylate) matrix; polymer; transmission electron microscopy; vector network analyzer; Coaxial components; Electromagnetic wave absorption; Electron emission; Iron; Magnetic fields; Microwave theory and techniques; Polymers; Scanning electron microscopy; Transmission electron microscopy; Transmission line matrix methods; Alignment; Magnetic; Microwave Absorption; Nanofibre; Polymer;
Conference_Titel :
Nanotechnology, 2007. IEEE-NANO 2007. 7th IEEE Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-0607-4
Electronic_ISBN :
978-1-4244-0608-1
DOI :
10.1109/NANO.2007.4601427
