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

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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.

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Acknowledgements

This research was supported by the National Research Foundation of Korea grant funded by the Korea Government (MSIP) (NRF-2018R1A6A1A03025761). This research was supported by the Technology Innovation Program (20011661) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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  1. School of Materials Science and Engineering, Kumoh National Institute of Technology, Daehak-ro 61, Gumi, South Korea

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

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  1. Jung-Jin Kim
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Correspondence to Jae-Seung Roh.

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Kim, JJ., Lee, SH., Youn, US. et al. Effect of mesophase formation from quinoline insoluble-containing coal tar pitch on physical properties of carbon blocks. Carbon Lett. (2024). https://doi.org/10.1007/s42823-024-00737-x

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  • DOI: https://doi.org/10.1007/s42823-024-00737-x

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