Korean Journal of Materials Research, Vol.31, No.2, 101-107, February, 2021
함침재의 점도에 따른 벌크흑연의 기공 채움 효과
The Pore-filling Effect of Bulk Graphite According to Viscosity of Impregnant
Pores produced by carbonization in bulk graphite process degrade the mechanical and electrical properties of bulk graphite. Therefore, the pores of bulk graphite must be reduced and an impregnation process needs to be performed for this reason. In this study, bulk graphite is impregnated by varying the viscosity of the impregnant. The pore volume and pore size distribution, according to the viscosity of the impregnant, are analyzed using a porosimeter. The total pore volume of bulk graphite is analyzed from the cumulative amount of mercury penetrated. The volume for a specific pore size is interpreted as the amount of mercury penetrating into that pore size. This decreases the cumulative amount of mercury penetrating into the recarbonized bulk graphite after impregnation because the viscosity of the impregnant is lower. The cumulative amount of mercury penetrating into bulk graphite before impregnation and after three times of impregnation with 5.1cP are 0.144 mL/g and 0.125 mL/gm, respectively. Therefore, it is confirmed that the impregnant filled the pores of the bulk graphite well. In this study, the impregnant with 5.1 cP, which is the lowest viscosity, shows the best effect for reducing the total pore volume. In addition, it is confirmed by Raman analysis that the impregnant is filled inside the pores. It is confirmed that phenolic resin, the impregnant, exists inside the pores through micro-Raman analysis from the inside of the pore to the outside.
- Lee SM, Kang DS, Roh JS, Carbon Lett., 16, 135 (2015)
- Fan CL, He H, Zhang KH, Han SC, Electrochim. Acta, 75, 311 (2012)
- Fan CL, He H, Zhang KH, Han SC, Carbon Lett, 7, 196 (2006)
- Xiaowei L, Jean-Charles R, Suyuan Y, Nucl. Eng. Des., 227, 273 (2004)
- Considine GD. Van Nostrand's Encyclopedia of Chemistry, 5th ed., p.739, John Wiley & Sons, Hoboken, New Jersey (2005).
- Cunningham N, Lefevre M, Dodelet JP, Thomas Y, Pelletier S, Carbon, 43, 3054 (2005)
- Zhao H, He Z, Guo X, Lian P, Liu Z, New Carbon Mater., 38, 184 (2020)
- Lewis IC, Baked and graphitized carbon(in Encyclopedia of Chemical Technology, 4th ed., p.953, Kirk-Othmer, John Wiley & Sons, New York (1992).
- Pierson HO, Properties, Processing, and Applications, p.72, Noyes Publications, Park Ridge, NJ (1993).
- Castner HY, GB Patent 19,089 (1893).
- Acheson EG, US Patent 568,323 (1896).
- Wen KY, Marrow TJ, Marsden BJ, Carbon, 46, 62 (2008)
- Turk DL, Processing of Baked and Graphitized Carbon, 4th ed., p.960, Kirk-Othmer, John Wiley & Sons, New York (1992).
- Charette A, Kocaefe D, Saint-Romain JL, Couderc P, Carbon, 29, 1015 (1991)
- Youm HN, Kim KJ, Lee JM, Chung YJ, J. Korean Ceram. Soc., 30, 852 (1993)
- Lee SM, Kang DS, Kim HS, Roh JS, Carbon Lett., 16, 132 (2015)
- Cuesta A, Dhamelincourt P, Laureyns J, Alonso AM, Tascon JMD, Carbon, 32, 1523 (1994)
- Kim YM, An KL, Kim C, Choi YO, Park SH, Yang KS, Lee WE, Carbon Lett., 1, 22 (2000)
- Kim HC, Lee SM, Nam G, Roh JS, Korean J. Met. Mater., 30, 522 (2020)
- Knight DS, White WB, J. Mater. Res., 4, 385 (1989)
- Endo M, Kim C, Karaki T, Kasai T, Matthews MJ, et al., Carbon, 36, 1633 (1998)
- Roh JS, Carbon Lett., 9, 127 (2008)
- Lipson H, Stokes AR, Proc. R. Soc. Lond. A, 181, 1010 (1942)
- Kim SS, J. Korean Electrochem. Soc., 11, 211 (2008)
- Oguchi Y, Mori J, Taikabutsu Overseas, 13, 43 (1993)
- Nagai B, Matsumoto O, Isobe T, Nishiumi Y, Taikabutsu Overseas, 12, 15 (1992)