Differences and correlations between microstructure and macroscopic properties of mesophase cokes derived from the components of high temperature coal tar pitch

中间相 微观结构 材料科学 焦炭 扫描电子显微镜 化学工程 复合材料 有机化学 化学 冶金 液晶 光电子学 工程类
作者
Chaoshuai Hu,Hongyu Chu,Yaming Zhu,Yunliang Xu,Junxia Cheng,Lijuan Gao,Shiquan Lai,Xuefei Zhao
出处
期刊:Fuel [Elsevier]
卷期号:310: 122330-122330 被引量:39
标识
DOI:10.1016/j.fuel.2021.122330
摘要

It has been universally believed that the soluble and insoluble components of coal tar pitch obtained by solvent extraction were good precursors to prepare mesophase cokes. The microstructure and macro properties of mesophase cokes derived from the soluble and insoluble components are varied in general. In order to study the differences and correlations between the microstructure and macro properties of mesophase cokes, 16 kinds of component in two categories have been prepared mesophase cokes as the raw materials. Briefly, Scanning electron microscope (SEM), Polarizing Microscope (PM), Raman spectroscopy, X-Ray Diffraction (XRD), thermogravimetry (TG) and Micro-strength intensity (MSI) have been used to characterize microstructure and macro properties of cokes. In fact, the graphite structure in extract-based cokes is larger and more orderly than that in residue-based cokes. The MSI of residue-based cokes (66 ∼ 81%) is higher than that of extract-based cokes (53 ∼ 60%), while Tmax (615 ∼ 645 ℃ and 680 ∼ 715 ℃) of the two are opposite. In a word, the results indicate that all data of the two categories of cokes go to bipolar distribution. And the results of this work were helpful for understanding and providing direction for the evaluation of cokes used to prepare isotropic and anisotropic graphite.
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