EXPERIMENTAL-DETERMINATION OF THE THERMAL-DIFFUSIVITY OF MOLTEN ALKALI-HALIDES BY THE FORCED RAYLEIGH-SCATTERING METHOD .2. MOLTEN NABR, KBR, RBBR, AND CSBR

This is a companion to an earlier paper (on molten alkali metal chlorides) which gives experimental results for the thermal diffusivity of four molten alkali metal bromides: NaBr, KBr, RbBr, and CsBr. The measurements were performed with a forced Rayleigh scattering instrument at temperatures up to 1326 K. The overall uncertainty in the measured thermal diffusivity is estimated to be +/- 3 to +/- 11%, depending on the measured salts. The results converted to thermal conductivity show one of the smallest values among other earlier experimental data obtained mainly by the steady-state methods. It is also found that the temperature dependence of the thermal conductivity is weakly negative.