CUED Publications database

Carbon nanotube wires for high-temperature performance

Janas, D and Cabrero-Vilatela, A and Bulmer, J and Kurzepa, L and Koziol, KK (2013) Carbon nanotube wires for high-temperature performance. Carbon, 64. pp. 305-314. ISSN 0008-6223

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Abstract

We developed carbon nanotube wires (CNWs) and monitored in situ their electrical properties at high temperature conditions for the first time. The dominant type of CNTs present in the material and packing density of thereof proved to have a dominant effect on the thermal stability of CNWs. Furthermore, we showed that kinetics of CNW oxidation plays an important role and slow heating rates or prolonged heating times are essential for the proper determination of thermal stability of CNTs. To enhance the stability at high temperatures, we applied SiC coating onto the CNWs, what allowed a 300 C improvement to the operational window, eventually reaching 700 C in the long-haul. Correlation of the change in electrical properties with thermogravimetric response showed that the loss of electrical percolation takes place at 100 C lower temperature than the last observed weight loss in CNTs content. Finally, we demonstrated feasibility of SiC-coated CNWs under high temperature conditions, by creating a heating device out of them. The presence of SiC layer gave rise to a significant improvement to the thermal stability of the CNT heaters, which now offer unprecedented range of operation reaching 700 C, as compared to 400 C when uncoated. © 2013 Elsevier Ltd. All rights reserved.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Manufacturing Systems
Div E > Production Processes
Depositing User: Unnamed user with email sms67@cam.ac.uk
Date Deposited: 13 Sep 2017 20:05
Last Modified: 18 Nov 2017 21:27
DOI: