Year: 2021
Type: article
Abstract: Every year a large amount of scrap can be produced from the Bi2Te3-based alloys when processing. A clean, new vacuum distillation method is proposed to purify Te from the scrap of Bi2Te3-based alloys. In this work, the saturated vapor pressure, distillation rate and separation coefficient of each metal element in Bi2Te3-based alloys are theoretically analyzed. The effects of distillation temperature and time on the volatilization and condensation behavior of elements are studied under the dynamic vacuum of 0.1 Pa. According to the research results, a multi-stage distillation method is proposed, and Te was purified from 41.53% to 98.88% while the total impurity content was reduced to 1.12% through this procedure. Moreover, Te of the scrap of Bi2Te3-based alloys can be separated and recovered effectively via this three-step vacuum distillation. The results lay the foundation for the industrial purification of Te and provide a low-cost, simple and green recycling process of thermoelectric scrap, which has important practical significance.
Source: Materials Research Express
Authors: Dong Kong, Dingya Chen, Zhixiang Kuang, Chenhui Xu, Bo Feng, Xiaoming Hu, Zhuo Chen, Yan Ma, Xi’ an Fan, Guangqiang Li, Yawei Li
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,530
Award: G7709698226
OpenAlex ID: W3205377393