Pb–Se–Te ternary system is of significant importance for thermoelectric applications. In spite of this, no systematic experimental or theoretical study of its phase diagram has been carried out up to now. The CALPHAD type theoretical assessment was done in the scope of this work for the Se–Te and Pb–Se–Te systems based on our own experimental work and the experimental results from literature. It was found out that the reassessment of the existing Se–Te phase diagram assessments is necessary because of some discrepancies between the experimental results and calculations for this system. This new dataset was consequently used for the new assessment of the Pb–Se–Te system and very good agreement was reached with existing experimental data.

Pb-Se-Te 三元体系对于热电应用具有重要意义。尽管如此，迄今为止还没有对其相图进行系统的实验或理论研究。根据我们自己的实验工作和文献中的实验结果，在本工作范围内对 Se-Te 和 Pb-Se-Te 系统进行了 CALPHAD 型理论评估。结果表明，由于该系统的实验结果和计算之间存在一些差异，因此有必要重新评估现有的 Se-Te 相图评估。因此，这个新数据集被用于 Pb-Se-Te 系统的新评估，并且与现有实验数据达成了非常好的一致性。