| Numéro |
J. Phys. IV France
Volume 03, Numéro C3, Août 1993
Proceedings of the Ninth European Conference on Chemical Vapour Deposition
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|---|---|---|
| Page(s) | C3-599 - C3-606 | |
| DOI | https://doi.org/10.1051/jp4:1993383 | |
Proceedings of the Ninth European Conference on Chemical Vapour Deposition
J. Phys. IV France 03 (1993) C3-599-C3-606
DOI: 10.1051/jp4:1993383
1 Department of Applied Chemistry, Faculty of Engineenng Gifu University, Gifu 501-11, Japan
2 Central Glass Co. Ltd., Japan
3 Nagasaki University, Japan
© EDP Sciences 1993
J. Phys. IV France 03 (1993) C3-599-C3-606
DOI: 10.1051/jp4:1993383
Preparation and properties of coiled carbon fibers by the catalitic pyrolysis of acetylene
S. MOTOJIMA1, I. HASEGAWA1, S. KAGIYA1, S. ASAKURA1, M. KAWAGUCHI2 and H. IWANAGA31 Department of Applied Chemistry, Faculty of Engineenng Gifu University, Gifu 501-11, Japan
2 Central Glass Co. Ltd., Japan
3 Nagasaki University, Japan
Abstract
Microcoiled carbon fibers were obtained by the Ni catalyzed pyrolysis of acetylene at 600-800°C. The presence of small amounts of a sulfur compound impurity was indispensable for the growth of the coiled carbon fibers in high yield with good reproducibility. The optimum growth temperature was 750°C irrespective of the kind of sulfur compounds used as the impurity. The optimum impurity gas flow rate was restricted to a very narrow range depending on the impurity type. The maximum yield (about 50 %) of the coiled carbon fibers was obtained using thiophene. Some properties of the coiled carbon fibers were examined. A new growth mechanism for the coiled carbon fibers will be presented.
© EDP Sciences 1993