Abstract
The thermal diffusivity of a graphite sheet having an extremely high anisotropy has been measured by a laser heating AC calorimetric method in the temperature range from 30 to 350 K. This graphite sheet has characteristics of high thermal diffusivity and high anisotropy, and it is only 100 μm thick. Thus, it is difficult to apply the conventional AC technique. Therefore, we propose a simultaneous measurement method for the in-plane and out-of-plane thermal diffusivities, by analyzing the three-dimensional heat conduction process, which contains the effects of anisotropy and thermal wave reflections. This method was verified by checking with thermal diffusivity measurements of isotropic materials such as stainless steel and pure copper and was then applied to the anisotropic thermal diffusivity measurement of the graphite sheet.
| Original language | English |
|---|---|
| Pages (from-to) | 301-312 |
| Number of pages | 12 |
| Journal | International Journal of Thermophysics |
| Volume | 22 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2001 |
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Keywords
- Anisotropy
- Graphite sheet
- High thermal diffusivity
- Laser-heating AC calorimetric method
- Simultaneous measurement
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Physical and Theoretical Chemistry
- Computational Mechanics
- Mechanics of Materials
- Physics and Astronomy (miscellaneous)
Cite this
Measurement of the Thermal Diffusivity of an Anisotropic Graphite Sheet Using a Laser-Heating AC Calorimetric Method. / Nagano, H.; Kato, H.; Ohnishi, A.; Nagasaka, Yuji.
In: International Journal of Thermophysics, Vol. 22, No. 1, 2001, p. 301-312.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Measurement of the Thermal Diffusivity of an Anisotropic Graphite Sheet Using a Laser-Heating AC Calorimetric Method
AU - Nagano, H.
AU - Kato, H.
AU - Ohnishi, A.
AU - Nagasaka, Yuji
PY - 2001
Y1 - 2001
N2 - The thermal diffusivity of a graphite sheet having an extremely high anisotropy has been measured by a laser heating AC calorimetric method in the temperature range from 30 to 350 K. This graphite sheet has characteristics of high thermal diffusivity and high anisotropy, and it is only 100 μm thick. Thus, it is difficult to apply the conventional AC technique. Therefore, we propose a simultaneous measurement method for the in-plane and out-of-plane thermal diffusivities, by analyzing the three-dimensional heat conduction process, which contains the effects of anisotropy and thermal wave reflections. This method was verified by checking with thermal diffusivity measurements of isotropic materials such as stainless steel and pure copper and was then applied to the anisotropic thermal diffusivity measurement of the graphite sheet.
AB - The thermal diffusivity of a graphite sheet having an extremely high anisotropy has been measured by a laser heating AC calorimetric method in the temperature range from 30 to 350 K. This graphite sheet has characteristics of high thermal diffusivity and high anisotropy, and it is only 100 μm thick. Thus, it is difficult to apply the conventional AC technique. Therefore, we propose a simultaneous measurement method for the in-plane and out-of-plane thermal diffusivities, by analyzing the three-dimensional heat conduction process, which contains the effects of anisotropy and thermal wave reflections. This method was verified by checking with thermal diffusivity measurements of isotropic materials such as stainless steel and pure copper and was then applied to the anisotropic thermal diffusivity measurement of the graphite sheet.
KW - Anisotropy
KW - Graphite sheet
KW - High thermal diffusivity
KW - Laser-heating AC calorimetric method
KW - Simultaneous measurement
UR - http://www.scopus.com/inward/record.url?scp=0042281533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042281533&partnerID=8YFLogxK
U2 - 10.1023/A:1006780208048
DO - 10.1023/A:1006780208048
M3 - Article
VL - 22
SP - 301
EP - 312
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
SN - 0195-928X
IS - 1
ER -