Effect of the average grain size of green pitch coke on the microstructure and properties of self-sintered graphite blocks

ZHAO Hong-chao; HE Zhao; GUO Xiao-hui; LIAN Peng-fei; LIU Zhan-jun

doi:10.1016/S1872-5805(20)60483-8

Volume 35 Issue 2

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Article Navigation > New Carbon Mater. > 2020 > 35(2): 184-192

ZHAO Hong-chao, HE Zhao, GUO Xiao-hui, LIAN Peng-fei, LIU Zhan-jun. Effect of the average grain size of green pitch coke on the microstructure and properties of self-sintered graphite blocks. New Carbon Mater., 2020, 35(2): 184-192. doi: 10.1016/S1872-5805(20)60483-8

Citation:

ZHAO Hong-chao, HE Zhao, GUO Xiao-hui, LIAN Peng-fei, LIU Zhan-jun. Effect of the average grain size of green pitch coke on the microstructure and properties of self-sintered graphite blocks. New Carbon Mater., 2020, 35(2): 184-192. doi: 10.1016/S1872-5805(20)60483-8

Citation:

ZHAO Hong-chao, HE Zhao, GUO Xiao-hui, LIAN Peng-fei, LIU Zhan-jun. Effect of the average grain size of green pitch coke on the microstructure and properties of self-sintered graphite blocks. New Carbon Mater., 2020, 35(2): 184-192. doi: 10.1016/S1872-5805(20)60483-8

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Effect of the average grain size of green pitch coke on the microstructure and properties of self-sintered graphite blocks

doi: 10.1016/S1872-5805(20)60483-8

1.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China (51572274, 91860116).

Received Date: 2020-01-03
Accepted Date: 2020-04-28
Rev Recd Date: 2020-04-01
Publish Date: 2020-04-28

Abstract

Abstract

Three self-sintered graphite blocks (SGs) were prepared from green pitch cokes with different average grain sizes (5.1, 3.1 and 1.9 μm) using cold isostatic compaction. The microstructures and properties of the SGs were characterized by XRD, SEM, mercury porosimetry, mechanical and thermal tests. Results indicated that the microstructures and properties of the SGs were closely related to the green coke granularity. When decreasing the average grain size of the green coke from 5.1 to 1.9 μm, the density, mechanical properties, Shore hardness and coefficient of thermal expansion increased while the degree of graphitization, crystallite diameter, thermal conductivity, median pore diameter and porosity decreased. The median pore diameters of the SGs were all in the nanometer range, which implied that they could effectively inhibit the infiltration of molten salt and might be used in molten salt reactors.
- Green pitch coke,
- Self-sintering property,
- Gran size,
- Microstructure and properties,
- Graphite blocks

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References(42)

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