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Korean Carbon Society (한국탄소학회)
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Raman Spectroscopical Evaluations of Carbonization and Graphitization of Coal Tar Pitch

  • Kim, Y.M. (Faculty of Applied Chemistry, Department of Textile Engineering, Chonnam National University) ;
  • An, K.L. (Faculty of Applied Chemistry, Department of Textile Engineering, Chonnam National University) ;
  • Kim, C. (Faculty of Applied Chemistry, Department of Textile Engineering, Chonnam National University) ;
  • Choi, Y.O. (Faculty of Applied Chemistry, Department of Textile Engineering, Chonnam National University) ;
  • Park, S.H. (Faculty of Applied Chemistry, Department of Textile Engineering, Chonnam National University) ;
  • Yang, K.S. (Faculty of Applied Chemistry, Department of Textile Engineering, Chonnam National University) ;
  • Lee, W.E. (School of Art and Design, Kwangju Women's University)
  • Received : 1999.12.28
  • Accepted : 2000.05.26
  • Published : 2000.06.30
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Abstract

Raman spectroscopy has been used to investigate the structure of coal tar pitch heat-treated up to $3000^{\circ}C$ by using 514.5 run Ar ion laser line. Four critical temperature ranges were found on pyrolyzing coal tar pitch, which correspond to four distinct processes from disordered carbons to the well-ordered graphite structure. The range of heat treat temperature (HTT) below $1000^{\circ}C$ corresponds to gas evolution during the pyrolysis of coal tar pitch. Above the HTT are correlated to rearrangements of enlarged molecules, growth of the molecules along the direction of plane, finally stacking in the normal direction of the plane, in the respective HTT ranges of 1000-2000, above 2000 and $2500-3000^{\circ}C$.

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