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| 论文编号: |
122214O120120047 |
| 第一作者所在部门: |
705组 |
| 中文论文题目: |
Simultaneous Measurements of Thermal Properties of Individual Carbon Fibers
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| 英文论文题目: |
Simultaneous Measurements of Thermal Properties of Individual Carbon Fibers
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| 论文题目英文: |
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| 作者: |
张星
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| 论文出处: |
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| 刊物名称: |
International Journal of Thermophysics
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| 年: |
2011
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| 卷: |
32 |
| 期: |
5 |
| 页: |
974 |
| 联系作者: |
张星 |
| 收录类别: |
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| 影响因子: |
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| 摘要: |
Combining the steady-state and quasi-steady-state T type probes, the longitudinal thermal conductivity and thermal effusivity of individual mesophase pitchbased carbon fiber heat treated at 2800 ？C and 1000 ？C have been measured from 100 K to 300 K. The present method allows simultaneous measurements of thermal properties using the same instrument, by simply changing the applied direct current to alternating current. The specific heat is found to decrease with increasing heattreatment temperature and to approach the value of graphite. The highly graphitized carbon fiber has a maximum thermal conductivity of 410 W·m？1 ·K？1 at about 250 K, and its thermal diffusivity decreases with increasing temperature. Comparatively, the thermal conductivity of the fiber heat treated at 1000 ？C is much smaller, with the peak shifting to high temperature due to a large defect density, and its thermal diffusivity is nearly temperature independent. |
| 英文摘要: |
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