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Thermal diffusivity and thermal conductivity of pyrolytic graphite from 300 to 2700° K

✍ Scribed by M.R. Null; W.W. Lozier; A.W. Moore

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
636 KB
Volume
11
Category
Article
ISSN
0008-6223

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✦ Synopsis

The thermal diffusivity and thermal conductivity of as-deposited, annealed, and stress-annealed pyrolytic graphite have been measured at room temperature and over the range 1500-2700°K. Values of the thermal conductivity parallel to the plane of deposition compare reasonably well with published results on similar materials, as do the values in the perpendicular direction at room temperature. The conductivity in the perpendicular direction for the annealed and stress-annealed materials is the first reported for such highly oriented materials at temperatures above 9OO"K, and they follow approximately a T" dependence with n =S l/2 over the temperature range 1500-2700"K, where the conductivity is two-to-three times larger than expected from a 7-l extrapolation from room temperature.

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