THERMAL-CONDUCTIVITY OF THE BINARY GAS OF THERMAL EXCITATIONS

The thermal conductivity of binary gas of thermal excitations in prese nce of the external scattering centers has been investigated. The obta ined results for coefficient of thermal conductivity is turned to be a pplicable for various mixtures of thermal excitations: phonons and rot ons in HeII, phonons of different polarizations in solids, phonons and magnons in ferrodielectrics. These general results are shown to be va lid at arbitrary relations between interaction rates of thermal excita tions of different types and rates of quasiparticles scattering on ext ernal scattering centers, The limiting case of fast and glow equilibri um between thermal excitations of different types were considered. Thi s fact allows to make the results available so far more accurate and d etermine the regions of those application.