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Temperature dependence of the electrical conductivity (a), thermopower (b), and thermal conductivity (c), and room temperature lattice thermal conductivity as a function of total filling fraction for skutterudites (d). The solid line is to guide eye. The lattice thermal conductivities of (×), (✫), (⊞), and (◇) from Ref. 18 are also shown. The solid line emphasizes the monotonic decrease in with increasing filling fraction .
(a) Temperature dependence of for DFS. (b) Temperature dependence of the for , (Ref. 24), and (Ref. 25).
Actual compositions as determined by EPMA and room temperature values of thermal conductivity, lattice thermal conductivity, electrical conductivity, thermopower, power factor, and carrier concentration for skutterudites.
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