Abstract
The work presented in this paper is part of a European project (Euramet 732) consisting in materialising the International Temperature Scale (ITS-90) between 83,805 8 K and 1 234,93 K. The French part of the project was done around two research topics. The first topic aimed at reducing the uncertainties affecting the materialisation of specific fixed points [Triple point of argon (83,805 8 K), triple point of mercury (234,315 6 K), freezing point of aluminum (933,473 K)]. The second axis consisted in developing a generator of temperature based on the techniques of adiabatic calorimetry at the indium point (429,748 5 K). Results from these studies either regarding the control of heat exchange or regarding the modeling of the impurities influence on the phase transition, could be extrapolated at the other fixed points. The technological innovations elaborated within the framework of this work could be also adapted to higher temperature ranges.