Toward New High Temperature Reference Materials for Calorimetry and Thermal Analysis

Abstract

Abstract. The French National Metrology Laboratory LNE-LCM has developed a high temperature reference facility for accurate measurements of the specific heat capacity and of the enthalpy of fusion of materials over the temperature range [23 °C, 1000 °C]. The metrological approach was to modify a commercial Calvet calorimeter in order to lower the uncertainty of measurement and to insure the metrological traceability of the measurements to the SI units, in particular by designing a new calibration system. The enthalpies of fusion of pure metals (indium, tin and silver) and of a binary alloy Ag-28Cu have been measured. The results obtained on the three pure metallic materials are in very good agreement with data obtained by other National Metrology Institutes (NMIs) using adiabatic calorimetry.

Uncertainty assessment of enthalpy of fusion measurements performed by using an improved Calvet calorimeter

“…In order to meet these metrological needs, and thanks to its experience in the field of calorimetry [10][11][12][13], LNE-LCM has developed a metrological facility in order to measure accurately the enthalpy of fusion of solids over the temperature range 23 °C to 1000 °C [14,15]. This facility ensures the traceability of calorimetric measurements to the international system of units using an absolute calibration method…”