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Determination of thermal conductivity and specific heat by a combined 3f/decay technique.

Author(s) : FRANK R., DRACH V., FRICKE J.

Type of article: Article

Summary

Using the thermal excitation of a sample with a plane-surface heater at frequency f and the observation of the 3f thermal response of this metal element, the temperature dependence of the thermal conductivity and the specific heat of fused silica have been determined over a wide temperature range. For measurements on electrically conducting solids, a technique for preparation of a dielectric insulating magnesium oxide film has been developed. A theoretical model is discussed, that allows to investigate also layered structures. Applying this model, the thermal effusivity of the upper polymethylmetacrylate layer of a polymethylmetacrylate-aluminum system and the effusivity of the substrate in a magnesium oxide stainless-steel system has been measured.

Details

  • Original title: Determination of thermal conductivity and specific heat by a combined 3f/decay technique.
  • Record ID : 1994-2215
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 64 - n. 3
  • Publication date: 1993/03
  • Document available for consultation in the library of the IIR headquarters only.

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