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Effect of mesophase formation from quinoline insoluble-containing coal tar pitch on physical properties of carbon blocks

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2024, 34(6), pp.1833-1844
  • DOI : 10.1007/s42823-024-00737-x
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : November 18, 2023
  • Accepted : April 9, 2024
  • Published : July 1, 2024

Kim Jung-Jin 1 Lee Sang Hye 2 Youn U-Sang 3 Gwon Sun-Ung 3 Byun Tae-Sub 3 Roh, Jae-Seung 2

1국립금오공과대학교 재료화학
2금오공과대학교
3국립금오공과대학교

Accredited

ABSTRACT

In the present study, a coal-based pitch containing 12.1% quinoline insoluble (QI) underwent isothermal heat treatment, and changes in the mesophase microstructure were analyzed for the heat treatment duration. The nuclei creation and growth rate of mesophase were affected by the distribution of QI particles in the pitch. The growth process could be explained in four regions through the mesophase area fraction. During the carbonization of carbon blocks, mesophase formation was induced in the binder phase. The physical properties of carbon blocks were measured as a function of residence time. As residence time increased, bulk density decreased and porosity increased, but electrical conductivity increased. It was determined that forming a mesophase in the binder phase during carbonization reduced the size of large pores in carbon block and improved the connectivity between particles, thereby increasing electrical conductivity. These results are expected to show greater improvement in electrical properties after graphitization.

Citation status

* References for papers published after 2023 are currently being built.