The change in the open porosity of bulk graphite as a function of the uniaxial molding pressure during manufacturing is studied using artificial graphite powder. Subsequently, the graphite is impregnated to determine the effect of the open porosity on the impregnation efficiency and to improve the density of the final bulk graphite. Bulk graphite is manufactured with different uniaxial molding pressures after mixing graphite powder, which is the by-product of processing the final graphite products and phenolic resin. The bulk density and open porosity are measured using the Archimedes method. The bulk density and open porosity of bulk graphite increase as the molding pressure increases. The open porosity of molded bulk graphite is 25.35% at 30 MPa and 29.84% at 300 MPa. It is confirmed that the impregnation efficiency increases when the impregnation process is performed on a specimen with large open porosity. In this study, the bulk density of bulk graphite molded at 300 MPa is 11.06% higher than that before impregnation, which is the highest reported increase. Therefore, it is expected that the higher the uniaxial pressure, the higher the density of bulk graphite.

Citations

Citations to this article as recorded by  

• Improving the packing and mechanical properties of graphite blocks by controlling filler particle-size distribution
  Hye in Hwang, Ji Hong Kim, Ji Sun Im
  Advanced Composite Materials.2024; 33(5): 762.     CrossRef
• Effect of Pressure and Holding Time during Compression Molding on Mechanical Properties and Microstructure of Coke-Pitch Carbon Blocks
  Sun-Ung Gwon, Sang-Hye Lee, U-Sang Youn, Jae-Seung Roh
  Applied Sciences.2024; 14(2): 772.     CrossRef
• Correlation between Pitch Impregnation Pressure and Pore Sizes of Graphite Block
  Changkyu Kim, Woong Kwon, Moon Hee Lee, Jong Seok Woo, Euigyung Jeong
  Materials.2022; 15(2): 561.     CrossRef