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

fYear

2007

fDate

2-5 Aug. 2007

Firstpage

1326

Lastpage

1329

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NANO.2007.4601427

Filename

4601427