Abstract
A guarded hot-plate apparatus for small circular samples has been developed for the temperature range from −75 to 200‡C. To avoid edge losses, the apparatus is immersed in a liquid whose temperature is a few degrees lower than the mean temperature of the samples. A detailed evaluation procedure with several correction calculations leads to a remaining uncertainty of measurement of 0.5% for measurements on glass samples. This has been confirmed by experiment. Measurements on glass and on insulation material showed that the developed apparatus and the evaluation procedure applied can be used in a relatively wide range of thermal conductivity values (factor 50).
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References
W. Fritz and K.-H. Bode, Chem. Ing. Tech. 37:1118 (1965).
H. Poltz and R. Jugel, Int. J. Heat Mass Transfer 25:1093 (1982).
M. J. Laubitz and D. L. McElroy, Metrologia 7:1 (1971).
K.-H. Bode, Int. J. Heat Mass Transfer 23:961 (1980).
Y. S. Touloukian and C. Y. Ho, Thermophysical Properties of Matter (IFI/Plenum Data, New York, 1970).
W. Fritz and W. Küster, WÄrme-Stoffübertragung 3:156 (1970).
M. Jakob, Z. Tech. Phys. 7:475 (1926).
S. Klarsfeld, in Compendium of Thermophysical Property Measurement Methods, Vol. 1, K. D. Maglić, A. Cezairliyan, and V. E. Peletsky, eds. (Plenum Press, New York, 1984), Chap. 4.
W. Hemminger, K.-H. Bode, and R. Jugel, PTB Mitt. 94:394 (1984).
E. H. Ratcliffe, Glass Technol. 4:113 (1963).
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Hemminger, W., Jugel, R. A guarded hot-plate apparatus for thermal conductivity measurements over the temperature range −75 to 200‡C. Int J Thermophys 6, 483–498 (1985). https://doi.org/10.1007/BF00508892
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DOI: https://doi.org/10.1007/BF00508892