Abstract

By applying the melt-centrifugation, porosity and dislocations are introduced in the microstructure of the n-type Zintl phase Mg3+xSb1.5Bi0.49Te0.01leading to significantly low κl (∼ 0.33 W m−1 K−1 at 723 K) and enhanced zT (∼ 1.64 at 723 K).

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