Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

• 영문명: Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber
• 발행기관: 한국탄소학회
• 저자명: Jung Dam Kim Jae-Seung Roh Myung-Soo Kim
• 간행물 정보: 『Carbon Letters』제21권, 51~60쪽, 전체 10쪽
• 주제분류: 자연과학 > 자연과학일반
• 파일형태: PDF
• 발행일자: 2017.01.01

영문 초록

Isotropic pitch-based fibers produced from coal tar pitch with the melt-blowing method were carbonized at temperatures ranging from 800 to 1600oC to investigate their crystalline structure and physical properties as a function of the carbonization temperature. The in-plane crystallite size (La) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800 S/cm. However, the variation in the d002 spacing and stacking height of the crystallite (Lc) showed that the structural order perpendicular to the graphene planes got worse in carbonization temperatures from 800 to 1200oC probably due to randomization through the process of gas evolution; however, structural ordering eventually occurred at around 1400oC. For the carbonized pitch powder without stabilization, structural ordering perpendicular to the graphene planes occurred at around 800？900oC indicating that oxygen was inserted during the stabilization process. Additionally, the shear stress that occurred during the melt-blowing process might interfere with the crystallization of the CPF.

목차

1. Introduction

2. Experimental

3. Results and Discussion

4. Conclusions

References

키워드

carbon fiber carbonization coal-tar-pitch crystalline structure electric conductivity