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Thermophysical properties of solid-phase paladium in a wide temperature range


N. Milosevic1 and M. Babic1

1Institute of Nuclear Sciences VINCHA, Belgrade, Serbia

Keywords: subsecond calorimetry, laser flash method
property: thermophysical properties
material: palladium

This paper presents experimental results of a range of thermophysical properties of pure polycrystalline palladium samples in a wide temperature range. Specific heat capacity and specific electrical resistivity were measured from 300 to 1800 K, total hemispherical emissivity and spectral normal emissivity from 1000 to 1800 K, and thermal diffusivity in the range from 250 to 1500 K. From measured data, thermal conductivity and Lorenz function were computed in the range from 300 to 1500 K. For necessary corrections, recent literature data on thermal linear expansion have been used. Specific heat capacity, electrical resistivity, and both emissivities were measured by millisecond pulse calorimetry, while the thermal diffusivity was obtained using the laser flash technique. The first method used specimens in the form of a thin rod, 2 mm in diameter and 200 mm in length, and the second one disk specimens of 3 mm in thickness and 10 mm in diameter. Measurement uncertainties for these methods do not exceed 5 % for heat capacity, 2 % for specific electrical resistivity, 5 to 20 % for two emissivities, and 3 % for thermal diffusivity. The results are compared with available literature values and discussed.

References
  1. K.D. Maglić, A. Cezairliyan, V.E. Peletsky, Compendium of Thermophysical Property Measurement Methods, Volume 1 - Survey of Measurement Techniques, (Plenum Press, New York, 1984)

  2. K.D. Maglić, A. Cezairliyan, V.E. Peletsky, Compendium of Thermophysical Property Measurement Methods, Volume 2 - Recommended Measurement Techniques and Practices, (Plenum Press, New York, 1992)

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