Synthesis, theoretical investigation and properties of nanocomposite thermoelectric materials

该项目的中心目标是研究碲化铅基材料的微观结构对其性能的影响。所研究的微观结构现象包括成分梯度、纳米尺度上沉淀物的形成、晶粒生长和偏析过程以及渗透网络中簇状结构的形成。这一建议的一个关键方面是，结构变化与性质的变化以及对各自热电材料的局部性质和电子状态的理论计算相关。此外，还将评估p-/n型Skutterudites和p-type LAST/n-type Pb-Bi-Te热电偶的潜在适用性。直接比较高质量的TEM信息、理论结果和性能概况是为了更好地预测纳米粉末材料的热电性能。

Central goal of this project is the investigation of the influence of the microstructure of Skutterudites and lead telluride-based materials on their properties. The microstructural phenomena under investigation encompass compositional gradients, formation of precipitates on the nanoscale, grain growth and segregation processes and the formation of cluster structures in a percolation network. It is a key aspect of this proposal that the structural changes are correlated to changes in properties and theoretical calculations on the local properties and electronic states of the respective thermoelectric material. In addition, a potential applicability of thermocouples of p-/n-type Skutterudites and p-type LAST/n-type Pb-Bi-Te will be evaluated. A direct comparison of high-quality TEM information, theoretical results and property profiles is directed versus better predictability of thermoelectric properties of nanopowder materials.