Process and apparatus for producing carbon nanotube, carbon nanotube fiber, and the like
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United States of America Patent
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Aug 21, 2012
Grant Date -
Jan 13, 2011
app pub date -
Feb 24, 2009
filing date -
Feb 25, 2008
priority date (Note) -
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Abstract
A chemical vapor deposition (CVD) device is equipped with a reaction vessel tube and a small vessel substrate in an electric furnace and with a heater and a thermocouple at the periphery thereof. A gas supply portion is connected to one of the reaction vessel tubes, and a pressure adjusting valve and an exhaust portion are connected to the other of the reaction vessel tubes, controlled by a control section such that the exhaust portion vacuum-exhausts the reaction vessel tube interior, the heater sublimates the small vessel substrate interior by rising temperature of catalyst iron chloride, and the gas supply portion bleeds an acetylene gas into the reaction vessel tube. As a result, iron chloride and the acetylene gas vapor-phase-react, a silicon oxide surface layer is formed to form growth nucleus of carbon nanotubes, and carbon nanotubes are grown so as to be oriented vertically.
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