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N‐type Mg3Sb2‐based thermoelectric materials show great promise in power generation due to their mechanical robustness, low cost of Mg, and high figure of merit (ZT) over a wide range of temperatures. However, their poor thermal stability hinders their practical applications. Here, MgB2 is introduced to improve the thermal stability of n‐type Mg3Sb2. Enabled by MgB2 decomposition, extra Mg can be...
N‐type Mg3(Bi, Sb)2‐based thermoelectric (TE) alloys show great promise for solid‐state power generation and refrigeration, owing to their excellent figure‐of‐merit (ZT) and using cheap Mg. However, their rigorous preparation conditions and poor thermal stability limit their large‐scale applications. Here, this work develops an Mg compensating strategy to realize n‐type Mg3(Bi, Sb)2 by a facile melting‐sintering...
Powder metallurgy introduces small structures of high‐density grain boundaries into Bi2Te3‐based alloys, which promises to enhance their mechanical and thermoelectric performance. However, due to the strong donor‐like effect induced by the increased surface, Te vacancies form in the powder‐metallurgy process. Hence, the as‐sintered n‐type Bi2Te3‐based alloys show a lower figure of merit (ZT) value...
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