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

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon Letters / 21권
· 저자명 : Jung Dam Kim, Jae-Seung Roh, Myung-Soo Kim

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

영어초록

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.

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