材料科学
石墨
各向同性
复合材料
停留时间(流体动力学)
多孔性
微观结构
碳化
结晶
收缩率
体积热力学
电阻率和电导率
化学工程
扫描电子显微镜
热力学
岩土工程
物理
电气工程
量子力学
工程类
作者
Sang-Hye Lee,Young-Min Hwang,Tae-Sub Byun,Jong-Hwan Ko,Jae-Seung Roh
出处
期刊:Carbon
[Elsevier]
日期:2023-04-06
卷期号:208: 443-451
被引量:17
标识
DOI:10.1016/j.carbon.2023.03.069
摘要
The present study aimed to determine the correlation between graphitization parameters during the manufacturing of isotropic graphite blocks, including temperature, residence time, and heating rate, and the physical properties of the obtained graphite blocks. It was found that during graphitization, nitrogen- and sulfur-containing gases were generated, and the isotropic graphite blocks exhibited volume shrinkage, and their apparent density and bulk density increased, regardless of any changes in the process parameters, due to the intrinsic microstructure of the isotropic coke. Graphite blocks with varying graphitization temperatures and residence time exhibited increased bulk density and open porosity but decreased flexural strength and electrical resistivity compared to carbonized blocks. It was also confirmed that the heating rate process parameter was related to gas release rates and crystallization. In addition, it was observed that micron-sized pores were created around the developed graphite layered structure with increasing graphitization degree.
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