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Study on the impedance of aligned carbon microcoils embedded in silicone rubber matrix |
| Zhu Ya-Bo(朱亚波)†, Zhang Lin(张林), Guo Li-Tong(郭立童), and Xiang Dong-Hu(项东虎) |
| School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract This paper reports that carbon microcoils are grown through a chemical vapour deposit process, they are then embedded in silicone rubber, and manipulated to parallel with each other along their axes in the resulting composite. The impedance |Z| as well as phase angle $\theta$ of both the original carbon microcoil sheets and the aligned carbon microcoil/silicone rubber composites are measured. The results illustrate that carbon microcoils in different forms show different alternating current electric properties. The aligned carbon microcoils in the composites show stable parameters for f<104 Hz but a sharp decrease in both |Z| and $\theta$ for frequencies >104 Hz, which will also change as the carbon microcoils are extended. But, the original sheets have a pure resistance with their parameters stable throughout the entire alternating current frequency range investigated.
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Received: 29 January 2010
Revised: 23 June 2010
Accepted manuscript online:
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PACS:
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72.80.Sk
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(Insulators)
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81.15.Gh
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(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))
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| Fund: Project supported by the Natural Science Foundation of Jiangsu Province of China (Grant No. BK2008129). |
Cite this article:
Zhu Ya-Bo(朱亚波), Zhang Lin(张林), Guo Li-Tong(郭立童), and Xiang Dong-Hu(项东虎) Study on the impedance of aligned carbon microcoils embedded in silicone rubber matrix 2010 Chin. Phys. B 19 126102
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