期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 339, 期 -, 页码 100-105出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2013.03.004
关键词
Polymer matrix composite; Manganese dioxide; Multi-wall carbon nanotube; Electromagnetic parameter; Reflection loss
资金
- National Science Council [NSC 101-2113-M-145-002]
An optimised composite sample was prepared using two dielectric materials manganese dioxide (MnO2) and multi-wall carbon nanotubes (MWNTs) in an epoxy-resin matrix. Structural characterisations of both the synthesised manganese dioxide (MnO2) and the multi-wall carbon nanotubes (MWNTs) were performed by using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The microwave absorption properties of dielectric composites with different weight fractions of MnO2 were investigated by measuring the complex permittivity, the complex permeability and the reflection loss in the 2-18 and 18-40 GHz microwave frequency ranges using the free space method. The complex permittivity varied with the MnO2 content, and the results show that a high concentration of fillers increased the dielectric constant. Therefore, the appropriate combination of components and experimental conditions can produce materials with specific characteristic for use as wide-band microwave absorbers. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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