Abstract Mg3Sb2-based materials possess promising thermoelectric performances, however, probably poor interfacial behaviors when connected with the metal electrodes due to the strong chemical activity and volatility of the element Mg. In this paper, a high conversion efficiency of up to 9 % was achieved with a reliable Mg3.2Sb1.5Bi0.49Te0.01/304 stainless steel junction at a temperature difference of 370 K (Th = 673 K, Tc = 303 K). The transformation from a single ferritic structure (Fe) to an austenitic structure (304 stainless steel) insures the lower diffusion coefficient and higher expansion coefficient of 304 stainless steel, which contributes to the suppressed interfacial reaction, ideal electrical properties, and robust mechanical properties from room temperature to higher temperature.

中文翻译：

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用于热电应用的可靠 N 型 Mg3.2Sb1.5Bi0.49Te0.01/304 不锈钢接头

摘要 Mg3Sb2 基材料具有良好的热电性能，然而，由于元素 Mg 的强化学活性和挥发性，当与金属电极连接时，其界面行为可能很差。在本文中，使用可靠的 Mg3.2Sb1.5Bi0.49Te0.01/304 不锈钢结在 370 K（Th = 673 K，Tc = 303 K）的温差下实现了高达 9% 的高转换效率. 从单一铁素体结构 (Fe) 到奥氏体结构 (304 不锈钢) 的转变确保了 304 不锈钢具有较低的扩散系数和较高的膨胀系数，这有助于抑制界面反应、理想的电性能和强大的机械性能室温到更高的温度。