Figure 5
From: Band Structure Engineering and Thermoelectric Properties of Charge-Compensated Filled Skutterudites

Thermal conductivity as a function of temperature.
(a) Total thermal conductivity of all the samples and (b) lattice thermal conductivity of YbxGa0.2Co4Sb11.9333 (x = 0, 0.05, 0.10, 0.15, 0.26) and Yb0.26Co4Sb12.