2003 Fiscal Year Final Research Report Summary
Measurements and MD Simulations of Physical Properties of a Carbon Fiber with High Thermal Conductivity
| Project/Area Number |
14550185
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
ZHANG Xing KYUSHU UNIVERSITY, Institute for Materials Chemistry and Engineering, Associate Professor, 先導物質化学研究所, 助教授 (40236823)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Measurement of Physical Properties / Carbon Fiber / Thermal Conductivity / Electrical Conductivity / MD Simulation |
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| Research Abstract |
The main results are as follows.
(1)Measurements of the thermal conductivity of the carbon fibers under different manufacturing conditions have been carried out. The effects of heat treatment temperature on the thermal conductivity have been clarified. The measured results show that the thermal conductivity greatly increases as an increase in heat treatment temperature, and even up to several hundred times when the heat treatment temperature is changed from 700℃ to 3000℃.
(2)Measurements of the, electrical conductivity of the carbon fibers under different manufacturing conditions have been performed. The effects of heat treatment temperature on the electrical conductivity have been clarified. When the heat treatment temperature is higher than 2000℃, the present results show a linear relation (λ_1=1260σ_e) between the thermal conductivity and electrical conductivity.
(3)With the help of scanning electronic microscope (SEM) and X-ray diffractometer (XRD), the microstructure of cross-sectional surface of carbon fiber, the grain size of crystal parallel to the graphite plane, the size normal to the graphite plane, interlayer spacing and the orientation degree of crystal were measured. The effects of heat treatment temperature on the microstructure of cross-sectional surface of carbon fiber have been clarified. A gently snaking belt at the center part of the cross-sectional surface enlarges as an increase in heat treatment temperature.
(4)Based on the present study, accurate values of the thermal and electrical conductivities of the carbon fiber itself have been known, the relationship between them has been clarified. These results will surely contribute to improvements of manufacturing process for the development of the carbon fiber with high thermal conductivity.
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Research Products
(6 results)
