New Facilities for the Measurements of High-Temperature Thermophysical Properties at LNE

LNE is expanding the measurement capabilities of its metrological platform devoted to the determination of the main thermophysical properties of materials toward very high temperatures. In particular, two facilities have been developed for measuring the directional spectral emissivity up to 1500 ^∘ C and the thermal diffusivity up to 3000 ^∘ C in the case of homogeneous solid materials and of thermal barrier coatings. These developments have required in particular the design of specific heating systems which are based either on the use of a lamp image furnace or on inductive heating technology. These works are performed in the framework of two international projects related to the thematic “Energy”, and which involve essentially European national metrology institutes. The availability of reference metrological facilities for the characterization of thermophysical properties of materials at high temperature with controlled uncertainties will enable ultimately the improvement of the traceability in academic and industrial research laboratories for measuring these quantities. This paper gives a detailed description of these metrological facilities and of the associated measurement methods.