Measurement of Thermophysical Properties of Solids by Arbitrary Heating : 3rd report, Measurement of Thermal Diffusivity and Thermal Conductivity of Cylindrical or Hollow Cylindrical Specimen

概要

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In order to measure the thermal diffusivity and thermal conductivity of a cylindrical or hollow cylindrical solid sample, the Laplace transform method is developed. In the general principle, a cylindrical sample is tightly enclosed in a hollow cylindrical sample and the temperature responses are detected at four sites in both samples which are heated from the periphery or central part. The principal systems for measuring the thermal diffusivity of cylindrical, hollow cylindrical and infinitely large samples are shown. The practical systems for simultaneous measurement are also shown. The method is examined by a numerical test and the measuring errors are evaluated. The respective test section and test appratus used in the thermal diffusivity measurement on stainless steel bar and simultaneous measurement on alumina and solidified-molten salt are shown.
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