Microwave absorbing properties and magnetic properties of different carbon nanotubes |
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| Authors: | XuChun Gui KunLin Wang JinQuan Wei RuiTao Lü QinKe Shu Yi Jia Chen Wang HongWei Zhu DeHai Wu |
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| Affiliation: | (1) Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China;(2) Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China |
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| Abstract: | The microwave absorbing properties and magnetic properties of as-grown Fe-filled carbon nanotubes (CNTs), annealed Fe-filled CNTs, and multi-walled CNTs were studied. Vibrating sample magnetometer results showed that the annealed Fe-filled CNTs have the weakest coercivity and strongest saturation magnetization among the three types CNTs, due to the presence of more ferromagnetic α-Fe nanowires. After annealing, the values increased to 291.0 Oe and 28.0 emu/g and the samples showed excellent microwave absorbing properties. The reflection loss was over 5 dB between 11.6 GHz and 18 GHz with a maximum value of 10.8 dB for annealed Fe-filled CNTs (1.1 wt%)/epoxy composite. |
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| Keywords: | carbon nanotubes microwave absorbing properties magnetic properties |
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