| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XIX
|
| Presentation Title |
Study on the Phase Diagrams of Bi-Te Binary and Bi-Te-RE (Yb, La, Ce, Nd, Sm, Tb, Er) Ternary Systems |
| Author(s) |
Cun Mao, Mingyue Tan, Libin Liu, Ligang Zhang |
| On-Site Speaker (Planned) |
Ligang Zhang |
| Abstract Scope |
Bi-Te based alloy is one of the most mature thermoelectric materials at
present. Because of its special electronic structure, rare earth elements
(RE) can be doped to effectively adjust the energy band structure of
thermoelectric materials and reduce the thermal conductivity of the crystal lattice thus improve the thermoelectric properties. The solid solubility of rare earth elements in Bi-Te alloys, the formation of ternary compounds, phase
stability, phase transition temperature and other phase diagram information can guide the design of thermoelectric materials via doping rare-earth elements. In this work, phase diagram and phase structures of Bi-Te system is carefully checked.The isothermal sections of Bi-Te-RE ternary systems were partly established by equilibrium alloy method. A ternary compound BiTeRE was
found. It is found that the solid solubility of rare earth elements in Bi-Te
matrix increases with the decrease of the atomic radius of rare earth elements. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |