JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Changes in the porosity of bulk graphite according to the viscosity of resin for impregnation
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Carbon letters
  • Volume 16, Issue 2,  2015, pp.132-134
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2015.16.2.132
 Title & Authors
Changes in the porosity of bulk graphite according to the viscosity of resin for impregnation
Lee, Sang-Min; Kang, Dong-Su; Kim, Hye-Sung; Roh, Jea-Seung;
  PDF(new window)
 Abstract
When manufacturing bulk graphite, pores develop within the bulk during the carbonization process due to the volatile components of the fillers and the binders. As a result, the physical properties of bulk graphite are inferior to the theoretical values. Impregnants are impregnated into the pores generated in the carbonization process through pressurization and/or depressurization. The physical properties of bulk graphite that has undergone impregnation and re-carbonization processes are outstanding. In the present study, a green body was manufactured by molding with natural graphite flakes and phenolic resin at 45 MPa. Bulk graphite was manufactured by carbonizing the green body at 700 and it was subsequently impregnated with impregnants having viscosity of 25.0 cP, 10.3 cP, and 5.1 cP, and the samples were re-carbonized at . The above process was repeated three times. The open porosity of bulk graphite after the final process was 22.25%, 19.86%, and 18.58% in the cases of using the impregnant with viscosity of 25.0 cP, 10.3 cP, and 5.1 cP, respectively.
 Keywords
bulk graphite;impregnation;impregnant;viscosity;pores;
 Language
English
 Cited by
 References
1.
White JL, Price RJ. The formation of mesophase microstructures during the pyrolysis of selected coker feedstocks. Carbon, 12, 321 (1974). http://dx.doi.org/10.1016/0008-6223(74)90073-6. crossref(new window)

2.
Zheng T, Reimers JN, Dahn JR. Effect of turbostratic disorder in graphitic carbon hosts on the intercalation of lithium. Phys Rev B, 51, 734 (1995). http://dx.doi.org/10.1103/PhysRevB.51.734. crossref(new window)

3.
Otani S, Oya A. Carbon products prepared from variant pitch materials. VIII. The preparation of isotropic pitch carbon with a high density. Bull Chem Soc Jpn, 46, 314 (1973). http://dx.doi.org/10.1246/bcsj.46.314. crossref(new window)

4.
Kim JY, Lee SY, Choi JH, Park YD. Preparation of carbon solid from dormant mesophase pitch without using a binder. J Korean Ceram Soc, 29, 396 (1992).

5.
Chung HJ, Lim YS. Preparation and characterization of mesophase pitches as a matrix precursor of carbon fiber reinforced carbon composite. J Korean Ceram Soc, 33, 1387 (1996).

6.
Bhatia G, Aggarwal RK. Influence of processed carbon black in the filler composition on the characteristics of baked carbon mixes. J Mater Sci, 16, 1757 (1981). http://dx.doi.org/10.1007/BF00540621. crossref(new window)

7.
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).

8.
Gao S, Tanada S, Abe I, Kitagawa M, Matsubara Y. Absorption of organic compounds on surface-modified activated carbons in aqueous solution. TANSO, 163, 138 (1994).

9.
Matzinos PD, Patrick JW, Walker A. Coal-tar pitch as a matrix precursor for 2-D C/C composites. Carbon, 34, 639 (1996). http://dx.doi.org/10.1016/0008-6223(96)00018-8. crossref(new window)

10.
Lee SM, Kang DS, Kim WS, Roh JS. Fabrication of isotropic bulk graphite using artificial graphite scrap. Carbon Lett, 15, 142 (2014). http://dx.doi.org/10.5714/CL.2014.15.2.142. crossref(new window)

11.
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). http://dx.doi.org/10.4191/KCERS.2009.46.1.016. crossref(new window)

12.
Nagai B, Matsumoto O, Isobe T, Nishiumi Y. Wear mechanism of castable for steel ladle by slag. Taikabutsu Overseas, 12, 15 (1992).