Carbon letters

Korean Carbon Society (한국탄소학회)
권호 표지
DOI QR코드

DOI QR Code

Fabrication of isotropic bulk graphite using artificial graphite scrap

  • Lee, Sang-Min (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology) ;
  • Kang, Dong-Su (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology) ;
  • Kim, Woo-Seok (Carbolab Co., Ltd.) ;
  • Roh, Jea-Seung (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology)
  • Received : 2014.01.22
  • Accepted : 2014.04.02
  • Published : 2014.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Isotropic synthetic graphite scrap and phenolic resin were mixed, and the mixed powder was formed at 300 MPa to produce a green body. New bulk graphite was produced by carbonizing the green body at $700^{\circ}C$, and the bulk graphite thus produced was impregnated with resin and re-carbonized at $700^{\circ}C$. The bulk density of the bulk graphite was $1.29g/cm^3$, and the porosity of the open pores was 29.8%. After one impregnation, the density increased to $1.44g/cm^3$ while the porosity decreased to 25.2%. Differences in the pore distribution before and after impregnation were easily confirmed by observing the microstructure. In addition, by using an X-ray diffractometer, the degrees-of-alignment (Da) were obtained for one side perpendicular to the direction of compression molding of the bulk graphite (the "top-face"), and one side parallel to the direction of compression molding (the "side-face"). The anisotropy ratio calculated from the Da-values obtained was 1.13, which indicates comparatively good isotropy.

Keywords

References

  1. Park SM, Yasuda E, Park YD. The influence of graphitic structure on oxidation reaction of carbon materials. J Korean Ceram Soc, 33, 816 (1996).
  2. Liu Z, Guo Q, Shi J, Zhai G, Liu L. Graphite blocks with high thermal conductivity derived from natural graphite flake. Carbon, 46, 414 (2008). http://dx.doi.org/10.1016/j.carbon.2007.11.050.
  3. Youm HN, Kim KJ, Lee JM, Chung YJ. Effects of impregnation on the manufacture of high density carbon materials. J Korean Ceram Soc, 30, 852 (1993).
  4. Choi WK, Kim BJ, Chi SH, Park SJ. Nuclear graphites (I): oxidation behaviors. Carbon Lett, 10, 239 (2009). https://doi.org/10.5714/CL.2009.10.3.239
  5. Jung JW, Kim KT. Effect of rubber mold on densification behavior of metal powder during cold isostatic pressing. Trans Korean Soc Mech Eng A, 22, 330 (1998).
  6. Chung SH, Kim KW, Kim MS, Lim YS. Analysis on raw materials for graphite electrode. J Res Inst Ind Technol, 18, 365 (1999).
  7. Wissler M. Graphite and carbon powders for electrochemical applications. J Power Sources, 156, 142 (2006). http://dx.doi.org/10.1016/j.jpowsour.2006.02.064.
  8. Park YD. Production technology of artificial graphite electrodes for arc furnace. Polym Sci Technol, 8, 155 (1997).
  9. Janerka K, Bartocha D. The sort of carburization and the quality of obtained cast iron. Arch Foundry Eng, 8, 55 (2008).
  10. Roessler A, Crettenand D. Direct electrochemical reduction of vat dyes in a fixed bed of graphite granules. Dyes Pigments, 63, 29 (2004). http://dx.doi.org/10.1016/j.dyepig.2004.01.005.
  11. Fan Cl, Chen H. Preparation, structure, and electrochemical performance of anodes from artificial graphite scrap for lithium ion batteries. J Mater Sci, 46, 2140 (2011). http://dx.doi.org/10.1007/s10853-010-5050-y.
  12. Aas KL. Performance of two graphite electrode qualities in EDM of seal slots in a jet engine turbine vane. J Mater Process Technol, 149, 152 (2004). http://dx.doi.org/10.1016/j.jmatprotec.2004.02.005.
  13. Han YS, Kim HJ, Shin YS, Park JK, Ko JC. Silver coating on the porous pellets from porphyry rock and application to an antibacterial media. J Korean Ceram Soc, 46, 16 (2009). https://doi.org/10.4191/KCERS.2009.46.1.016
  14. Ishizaki KZ, Komarneni S, Nanko M. Porous Materials: Process Technology and Applications, Kluwer Academic Publishers, Dordrecht (1998).
  15. Cao A, Xu C, Liang J, Wu D, Wei B. X-ray diffraction characterization on the alignment degree of carbon nanotubes. Chem Phys Lett, 344, 13 (2001). http://dx.doi.org/10.1016/S0009-2614(01)00671-6.
  16. Roh JS. A structural study of the oxidized high modulus pitch based carbon fibers by oxidation in carbon dioxide. Carbon Lett, 5, 27 (2004).
  17. Seehra MS, Pavlovic AS, Babu VS, Zondlo JW, Stansberry PG, Stiller AH. Measurements and control of anisotropy in ten coal-based graphites. Carbon, 32, 431 (1994). http://dx.doi.org/10.1016/0008-6223(94)90163-5.
  18. Weller TE, Ellerby M, Saxena SS, Smith RP, Skipper NT. Superconductivity in the intercalated graphite compounds C6Yb and C6Ca. Nat Phys, 1, 39 (2005). http://dx.doi.org/10.1038/nphys0010.
  19. Slack GA. Anisotropic thermal conductivity of pyrolytic graphite. Phys Rev, 127, 694 (1962). http://dx.doi.org/10.1103/PhysRev.127.694.
  20. Oh JK, Lee SW, Park KW. Preparation of isotropic carbon with high density. J Korean Ceram Soc, 28, 908 (1991).

Cited by

  1. Changes in the porosity of bulk graphite according to the viscosity of resin for impregnation vol.16, pp.2, 2015, https://doi.org/10.5714/CL.2015.16.2.132
  2. Bulk graphite: materials and manufacturing process vol.16, pp.3, 2015, https://doi.org/10.5714/CL.2015.16.3.135