Changes in the porosity of bulk graphite according to the viscosity of resin for impregnation

• 영문명: Changes in the porosity of bulk graphite according to the viscosity of resin for impregnation
• 발행기관: 한국탄소학회
• 저자명: Sang-Min Lee Dong-Su Kang Hye-Sung Kim Jea-Seung Roh
• 간행물 정보: 『Carbon Letters』제16권 제2호, 132~134쪽, 전체 3쪽
• 주제분류: 자연과학 > 자연과학일반
• 파일형태: PDF
• 발행일자: 2015.04.30

영문 초록

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 700°C. 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.

목차

1. Introduction

2. Experimental Procedure

3. Results and Discussion

4. Conclusions

References

키워드

bulk graphite impregnation impregnant viscosity pores