There is a need for an advanced and novel new generation thermoelectric materials with improved properties over conventional systems. This work describes the solid-state synthesis of mono-phase and high dense (>97%) nanocrystalline lead-tin-selenium-tellurium (PbSnSeTe) high entropy alloy (HEA) combining 5 h of mechanical alloying (MA) and 11 min of spark plasma sintering (SPS). High configurational entropy, multi-elemental concentration and nanostructuring phenomena synergistically obstruct the thermal transport by lowering the lattice thermal conductivity (<0.5 W/mK). X-ray diffraction (XRD) and electron microscopy analyses confirm the formation of single-phase nanocrystalline PbSnSeTe HEA with excellent structural homogeneity. The HEA shows an encouraging thermoelectric power factor (6.74×10⁻⁴ W/mK²) and thermoelectric figure of merit (0.47) at 623 K.

需要具有优于传统系统的改进性能的先进和新颖的新一代热电材料。这项工作描述了单相和高密度 (>97%) 纳米晶铅锡硒碲 (PbSnSeTe) 高熵合金 (HEA) 的固态合成，结合了 5 小时的机械合金化 (MA) 和 11 分钟的放电等离子烧结（SPS）。高构型熵、多元素浓度和纳米结构现象通过降低晶格热导率 (<0.5 W/mK) 协同阻碍热传输。X 射线衍射 (XRD) 和电子显微镜分析证实了具有优异结构均匀性的单相纳米晶 PbSnSeTe HEA 的形成。HEA 显示出令人鼓舞的热电功率因数 (6.74×10 ^-4  W/mK² ) 和 623 K 时的热电品质因数 (0.47)。