Composites Research

  • 제34권1호
  • /
  • Pages.51-56
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  • 2021
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  • 2288-2103(pISSN)
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  • 2288-2111(eISSN)
한국복합재료학회 (The Korean Society for Composite Materials)
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콜타르를 결합재 및 함침재로 이용한 벌크 흑연 제조

A Study on the Possibility of Bulk Graphite Manufacturing using Coal Tar as a Binder and an Impregnant

  • Lee, Sang-Min (Advanced Material Research Center, Kumoh National Institute of Technology) ;
  • Lee, Sang-Hye (School of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Kang, Dong-Su (Pohang Research Lab Steelmaking Research Group, POSCO) ;
  • Roh, Jae-Seung (School of Materials Science and Engineering, Kumoh National Institute of Technology)
  • 투고 : 2021.01.06
  • 심사 : 2021.02.24
  • 발행 : 2021.02.28
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초록

석탄 핏치의 전구체인 콜타르를 바인더 및 함침재로 이용하여 벌크흑연을 제조할 수 있는 가능성을 검토하고자 하였다. 충전재로 천연흑연을 이용하였으며, 천연흑연과 콜타르를 혼합 및 성형한 후 탄화 열처리를 실시하였다. 탄화 열처리 후 함침-재탄화를 5회 실시하여 밀도, 기공율, 압축강도, 그리고 이방성비를 측정하였다. 탄화체의 최고 밀도는 1.76 g/㎤였고, 기공율은 최소 15.6%로써 공정 제어에 의해 조절이 가능하였다. 압축강도는 최고 20.3 MPa이 얻어졌다. 탄화체의 이방비는 최대 0.34로써 강한 이방성 탄화체를 얻을 수 있었다. 따라서 콜타르를 바인더 및 함침재로 이용하여 벌크 형태의 인조흑연 제조가 가능하다는 것을 확인하였다. 또한 탄화체의 이방성을 조절하여 전기적, 기계적 방향 특성을 조절한다면 적절한 재료 설계를 통하여 다양한 분야에 응용할 수 있을 것이라 판단된다.

This paper studied the possibility of manufacturing bulk graphite using coal tar, a precursor of coal tar pitch, as a binder and impregnant. Carbonization was conducted after mixing and molding with natural graphite as a filler and coal tar as a binder. Impregnation-recarbonization was performed five times after carbonization. Coal tar used as impregnant. Measuring density, porosity, compressive strength, and anisotropy ratio was conducted. The maximum density of bulk graphite specimen was 1.76 g/㎤ and the minimum porosity was 15.6% which could be controlled by process control. The highest compressive strength was 20.3 MPa. Then the maximum anisotropic ratio of bulk was shown 0.34 through XRD analysis. Therefore, it was confirmed that it was possible to manufacture artificial graphite in a bulk form by using coal tar as a binder and an impregnant.

키워드

참고문헌

  1. Zabel, H., and Solin, S.A., "Graphite Intercalation Compounds II : Transport and Electronic Properties", Springer, New York, 1992.
  2. Donnet, J.B., Park, S.J., and Brendle, M., "The Effect of Microwave Plasma Treatment on the Surface Energy of Graphite as Measured by Inverse Gas Chromatography," Carbon, Vol. 30, No. 2, 1992, pp. 263-268. https://doi.org/10.1016/0008-6223(92)90089-F
  3. Mattson, J.S., and Mark, H.B., "Activated Carbon", Marcel Dekker, New York, 1971.
  4. Ohkita, K., and Tubokawa, N., "The Reaction of Carbon Black Surface with 2, 2-diphenyl-1-picrylhydrazyl," Carbon, Vol. 10, No. 5, 1972, pp. 631-636. https://doi.org/10.1016/0008-6223(72)90101-7
  5. Lee, S.M., Kang, D.S., and Roh, J.S., "Bulk Graphite : Materials and Manufacturing Process," Carbon Letters, Vol. 16, No. 3, 2015, pp. 135-146. https://doi.org/10.5714/CL.2015.16.3.135
  6. Franklin, R.E., "Crystallite Growth in Graphitizing and Nongraphitizing Carbons," Proceedings of the Royal Society A., Vol. 209, No. 1097, 1951, pp. 196-218.
  7. Yamashita, Y., and Ouchi, K., "A Study on Carbonization of Phenol-formaldehyde Resin Labelled with Deuterium and 13C," Carbon, Vol. 19, No. 2, 1981, pp. 89-94. https://doi.org/10.1016/0008-6223(81)90112-3
  8. Han, Y.S., Kim, H.J., Shin, Y.S., Park, J.K., and Ko, J.C., "Silver Coating on the Porous Pellets from Porphyry Rock and Application to an Antibacterial Media", Journal of the Korean Ceramic Society, Vol. 46, No. 1, 2009, pp. 16-23. https://doi.org/10.4191/KCERS.2009.46.1.016
  9. Komarneni, S., and Nanko, M., "Porous Materials : Process Technology and Applications", Kluwer-Academic, London, 1998.
  10. Lee, S.M., Kang, D.S., Kim, W.S., and Roh, J.S., "Fabrication of Isotropic Bulk Graphite Using Artificial Graphite Scrap," Carbon Letters, Vol. 15, No. 2, 2014, pp. 142-145. https://doi.org/10.5714/CL.2014.15.2.142
  11. Cao, A., Xu, C., Liang, J., Wu, D., and Wei, B., "X-ray Diffraction Characterization on the Alignment Degree of Carbon Nanotubes," Chemical Physics Letters, Vol. 344, No. 1, 2001, pp. 13-17. https://doi.org/10.1016/S0009-2614(01)00671-6
  12. Roh, J.S., "A Structural Study of the Oxidized High Modulus Pitch Based Carbon Fibers by Oxidation in Carbon Dioxide," Carbon Letters, Vol. 5, No. 1, 2004, pp. 27-33.
  13. Seehra, M.S., Pavlovic, A.S., Babu, V.S., Zondlo, J.W., Stansberry, P.G., and Stiller, A.H., "Measurements and Control of Anisotropy in ten Coal-based Graphites," Carbon, Vol. 32, No. 3, 1994, pp. 431-435. https://doi.org/10.1016/0008-6223(94)90163-5
  14. Weller, T.E., Ellerby, M., Saxena, S.S., Smith, R.P., and Skipper, N.T., "Superconductivity in the Intercalated Graphite Compound C6Yb and C6Ca," Nature Physics, Vol. 1, No. 1, 2005, pp. 39-41. https://doi.org/10.1038/nphys0010
  15. Slack, G.A., "Anisotropic Thermal Conductivity of Pyrolytic Graphite," Physical Review, Vol. 127, No. 3, 1962, pp. 694-701. https://doi.org/10.1103/PhysRev.127.694
  16. Park, S.M., Han, S.M., and Oh, S.M., "Characterization of Artificial Graphite Electrodes," Carbon Letters, Vol. 1, No. 2, 2000, pp. 76-81.
  17. Seo, S.K., and Roh, J.S., "Effect of the Heat Treatment Temperature on the Compressive Strength of Coal Powder Compacts," Carbon Letters, Vol. 13, No. 3, 2012, pp. 151-156. https://doi.org/10.5714/CL.2012.13.3.151