| 摘要 |
PROBLEM TO BE SOLVED: To provide a curled carbon fiber useful as a filler material for improving electric conductivity, thermal conductivity, and strength, further as an adsorbent for occluding hydrogen, methane, or other various kinds of gases, and as a catalyst carrier, and given at a reduced cost. SOLUTION: This curled carbon fiber has a multilayer structure having a hollow structure in its inside, wherein a carbon structure of an internal layer part of the multilayer structure includes a herringbone structure and a carbon structure of an external layer part of the multilayered structure is different from the carbon structure of the internal layer. A method for producing the carbon fiber by vapor phase growing comprises contacting a carbon source and/or a catalyst source with a sulfur source in a heating zone, wherein the curled carbon fiber is produced by setting a ratio of a mol number of sulfur atoms in the sulfur source to a mol number of metal atoms of the catalyst to be 2.0 or more. COPYRIGHT: (C)2005,JPO&NCIPI
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