中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 10 October 2025 |
（1. Key Laboratory for Nonferrous Metals Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China;
2. National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China;
3. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
4. College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;
5. State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China;
6. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China）
Abstract:The erosion process and kinetics of PbTe particles in a selenium melt were investigated. The results reveal that the limiting step of the reaction is controlled by product layer diffusion and the interfacial chemical reaction at low temperatures (573, 583, and 593 K), but the limiting step is controlled by boundary layer diffusion at high temperatures (603 and 613 K). The Se- and Te-atom diffusion in the product layer becomes unbalanced as the product layer thickens, with Kirkendall voids generating in the product layer accelerating PbTe particle erosion. After the PbTe impurities in the selenium melt evolve into PbSe and Te, Te is evenly distributed in the selenium melt owing to the solubility of Se and Te. This study serves to clarify the evolution behavior of PbTe impurities in the selenium melt and the reason that Te often occurs in Se.
Key words: PbTe; selenium; diffusion kinetics; erosion behavior
