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A New Guarded Hot Plate Designed for Thermal-Conductivity Measurements at High Temperature

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Abstract

The Laboratoire National de Métrologie et d’Essais has developed a new guarded hot-plate apparatus operating from \(23\,^{\circ }\hbox {C}\) to \(800\,^{\circ }\hbox {C}\) in the thermal-conductivity range from \(0.2\,\hbox {W}{\cdot }\hbox {m}^{-1}{\cdot }\hbox {K}^{-1}\) to \(5\,\hbox {W}{\cdot }\hbox {m}^{-1}{\cdot }\hbox {K}^{-1}\). This facility has been specifically designed for measuring medium thermal-conductivity materials at high temperature on square specimens (100 mm side), which are easier to machine than circular ones. The hot plate and cold plates are similar with a metering section independent from the guard ring. The specimens are laterally isolated by an air gap of 4 mm width and can be instrumented by temperature sensors in order to reduce effects of thermal contact resistances between the specimens and the heating plates. Measurements have been performed on certified reference materials and on “calibrated” materials. Relative deviations between thermal conductivities measured and reference values are less than 5 % in the operating range.

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Authors and Affiliations

  1. Laboratoire National de Métrologie et d’Essais (LNE), 75015, Paris, France

    V. Scoarnec, J. Hameury & B. Hay

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  1. V. Scoarnec
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  2. J. Hameury
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  3. B. Hay
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Correspondence to B. Hay.

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Scoarnec, V., Hameury, J. & Hay, B. A New Guarded Hot Plate Designed for Thermal-Conductivity Measurements at High Temperature. Int J Thermophys 36, 540–556 (2015). https://doi.org/10.1007/s10765-014-1794-y

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  • DOI: https://doi.org/10.1007/s10765-014-1794-y

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