[ 19 ] It is worth noting that the κ L of CaAgSb prepared in this work keeps a decreasing trend with rising temperature from ≈0.59 W m −1 K −1 at 300 K to ≈0.3 W m −1 K −1 at 623 K, much lower than that of the CaAgSb prepared by melting in the whole measured temperature range.
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Ultralow Lattice Thermal Conductivity of Zintl-Phase CaAgSb Induced by Interface and Superlattice Scattering.
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