Carbonized blocks with different porosities were prepared by varying the particle size of the filler and subsequent impregnation. The impregnated carbonized blocks were re-carbonized. The use of smaller particles in the filler in the carbonized block was associated with larger porosity, smaller pore size, and a higher impregnation ratio. The block with the smallest average particle size (53 μm), CB-53, had a porosity of 35.9% and pores of approximately 40 μm, while the block with the largest average particle size (413 μm), CB-413, had a porosity of 30.5% and pores of approximately 150 μm. CB-53 had the highest bulk density, electrical resistivity, flexural strength, and impregnation ratio. This is due to the large porosity, which is believed to be due to the presence of more interfaces between particles during the re-carbonization of the impregnated carbonized block, resulting in a better pore-filling effect.

1. Introduction
2. Experimental Procedure
    2.1 원료 준비
    2.2 함침 및 재탄화
    2.3 부피밀도 및 기공률 측정
    2.4 전기비저항 측정
    2.5 굽힘강도 측정
    2.6 미세조직 분석
3. Results and Discussion
    3.1 입도에 따른 탄화블록의 함침 전후 물성 변화
    3.2 입도에 따른 탄화블록의 함침 전후 미세조직 변화
4. Conclusion
Funding
Conflict of Interest
Data Availability Statement
Author Information and Contribution
Acknowledgement
References

• 윤우상(금오공과대학교 신소재공학과) | U-Sang Youn (School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk 39177, Republic of Korea)
• 이상혜(금오공과대학교 신소재공학과) | Sang-Hye Lee (School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk 39177, Republic of Korea)
• 노재승(금오공과대학교 신소재공학과) | Jae-Seung Roh (School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk 39177, Republic of Korea) Corresponding author