Thermal conductivity of lithium, sodium and potassium in the liquid state

The thermal conductivity (λ) of Li, Na and K melts was measured by the laser flash method in the temperature interval from the melting point up to 1023 … 1123 K. The error in the measurements was 4–6%. The data of this paper were compared with the results of other authors. The approximation equations and a table of reference values for the temperature dependence of λ have been obtained. The dependence of the Lorenz number on temperature has been calculated.