Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Carbon Nanotube Growth on Invar Alloy using Coal Tar Pitch

콜타르피치를 이용한 Invar 합금 위 탄소나노튜브의 합성

  • Kim, Joon-Woo (Department of Nano Applied Engineering, Kangwon National University) ;
  • Jeong, Goo-Hwan (Department of Nano Applied Engineering, Kangwon National University)
  • 김준우 (강원대학교 공과대학 나노응용공학과) ;
  • 정구환 (강원대학교 공과대학 나노응용공학과)
  • Received : 2017.11.14
  • Accepted : 2017.12.13
  • Published : 2017.12.31
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Abstract

We report the growth of carbon nanotubes (CNT) on Invar-42 plates using coal tar pitch (CTP) by chemical vapor deposition (CVD) method. The solid phase CTP is used as an inexpensive carbon source since it produces a bunch of hydrocarbon gases such as $CH_4$ and other $C_xH_v$ by thermal decomposition over $450^{\circ}C$. The Invar-42 is a representative Ni-based ferrous alloy and can be used repetitively as a substrate for CNT growth because Ni and Fe are used as very active catalytic elements. We changed mixing ratio of carrier gases, argon and hydrogen, and temperature of growth region. It was found that the optimum gas ratio and temperature for high quality CNT growth are $Ar:H_2=400:400$ sccm and $1000^{\circ}C$, respectively. In addition, the carbon nanoball (CNB) was also obtained by just changing the mixing ratio to $Ar:H_2=100:600$ sccm. Finally, CTP can be employed as a versatile carbon source to produce various carbon-based nanomaterials, such as CNT and CNB.

Keywords

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