Modern ideas about the development of the energy sector in Russia are associated with the design and technical implementation of fast neutron thermonuclear reactors. For these power plants it is proposed to use tritium-reproducing liquid melts of two- and three-component systems containing bismuth, lead, and lithium in the circuits of fuel element cooling and heat transfer. Positive characteristics of these melts are high vaporization temperature, the possibility of increasing the temperature of the working zone at practically unchanged pressure, reduction of reactor dimensions, and other qualities determined by the thermophysical properties of pure components. Therefore, in this work, the functions obtained in the author’s model of coexistence in the local-equilibrium region of two ideal phases with different order parameters are applied to approximate the arrays of experimental data on the thermophysical characteristics of lithium, lead, bismuth and their alloys. Unlike previously used approaches (electron-phonon model, interpolation of data by step polynomials and others), the proposed model describes with the help of a continuous function the increase of heat capacity with increasing temperature; the peak of thermal conductivity in the vicinity of absolute zero and its further changes are modeled from the same position. The model with small errors displays features on temperature dependences in the form of finite jumps, peaks and pits with rounded and sharp tops. It allows to carry out adequate modeling of specific electrical resistance, as well as to obtain good enough estimates of thermophysical properties of alloys, based on data on similar characteristics of their components. The similarity of thermophysical properties of the binary eutectic system of bismuth-lead and ternary melt of bismuth-lead-lithium has been established. Changes in the thermophysical properties of pure metals when they are mixed are also demonstrated.
S. V. Terekhov (Wed,) studied this question.