Peculiarities of lattice-thermal conductivity of (TlBiS/sub 2/)/sub 1-x/-(2PbS)/sub x/ alloys

Investigations of transport phenomena have shown that the lattice part of thermal-conductivity of novel (TlBiS/sub 2/)/sub 1-x/(2PbS)/sub x/ thermoelectrics decreases down to 0.26 W/mK, which is approaching the theoretical minimum. As a result, the thermoelectric figure of merit Z for these alloys /spl sim/25% exceeding the respective value for lead sulfide at room temperature.