非定常加熱による熱物性値の簡易測定

概要

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A simple method of measuring thermophysical properties has been developed. Two square plates of a specimen are heated stepwise for a few seconds by a film heater which is placed between the plates. The resulting temperature history of the opposite surface, to which an aluminum foil is attached to make it have high thermal and electric conductivities, is measured by pressing separated C-A thermocouple wires against the surface. From a comparison between the measured and theoretical temperature histories, the thermal diffusivity, the specific heat and the thermal conductivity of the specimen can be determined automatically in a few minutes by a personal computer. To confirm the accuracy of this method, the specific heat and the thermal conductivity of Pyrex 7740 glass were measured and compared with the reported values. The results showed that the present method can be applied with reasonable accuracy of no more than 10%.
一般社団法人日本機械学会の論文
1992-01-25