The evolution of microstructure and thermal conductivity of mesophase pitch-based carbon fibers with heat treatment temperature

FAN Zhen; Cao Min; YANG Wen-bin; ZHU Shi-peng; FENG Zhi-hai

doi:10.1016/S1872-5805(19)60002-8

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FAN Zhen, Cao Min, YANG Wen-bin, ZHU Shi-peng, FENG Zhi-hai. The evolution of microstructure and thermal conductivity of mesophase pitch-based carbon fibers with heat treatment temperature. New Carbon Mater., 2019, 34(1): 38-43. doi: 10.1016/S1872-5805(19)60002-8

Citation:

FAN Zhen, Cao Min, YANG Wen-bin, ZHU Shi-peng, FENG Zhi-hai. The evolution of microstructure and thermal conductivity of mesophase pitch-based carbon fibers with heat treatment temperature. New Carbon Mater., 2019, 34(1): 38-43. doi: 10.1016/S1872-5805(19)60002-8

Citation:

FAN Zhen, Cao Min, YANG Wen-bin, ZHU Shi-peng, FENG Zhi-hai. The evolution of microstructure and thermal conductivity of mesophase pitch-based carbon fibers with heat treatment temperature. New Carbon Mater., 2019, 34(1): 38-43. doi: 10.1016/S1872-5805(19)60002-8

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The evolution of microstructure and thermal conductivity of mesophase pitch-based carbon fibers with heat treatment temperature

doi: 10.1016/S1872-5805(19)60002-8

1.
Key Laboratory of Advanced Functional Composite Materials, Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;
2.
Equipment Project Management Center, Beijing 100076, China

Funds: Key Laboratory of Advanced Functional Composite Materials Foundation.

Received Date: 2019-01-02
Accepted Date: 2019-02-20
Rev Recd Date: 2019-01-30
Publish Date: 2019-02-28

Abstract

Abstract

The evolution of microstructure and morphology of mesophase pitch-based carbon fibers (MPCFs) with heat treatment temperature (HTT) was investigated by SEM, TEM, Raman spectroscopy and XRD. The thermal conductivity of the MPCFs was examined by a modified 3ω method. Results indicate that the degree of graphitization and the thermal conductivity of the MPCFs increase with HTT. The thermal conductivity of the MPCFs reaches 518 W/m·K at a HTT of 3000℃. The thermal conductivity of MPCFs varies linearly with HTT in two distinct ranges, 1000-2000 and 2300-3000℃, that respectively correspond to the growth and orientation of graphite crystallites.
- MPCFs,
- Structure,
- Thermal conductivity,
- Heat treatment

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