| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
|
| Presentation Title |
Investigation of Instability Mechanism in Mg3(Sb, Bi)2-Based Materials for Thermoelectric Applications |
| Author(s) |
Sahiba Bano, Takao Mori |
| On-Site Speaker (Planned) |
Sahiba Bano |
| Abstract Scope |
Zintl n-type Mg3(Sb, Bi)2-based materials have emerged as promising candidates for thermoelectric (TE) applications, as demonstrated by several thermoelectric generator prototypes that exhibit technological maturity. Although these compounds show attractive TE properties, material stability is crucial for large-scale applications. In this study, we investigated the stability of Mg3(Sb, Bi)2-based compounds by examining Mg loss in synthesized samples. Comprehensive X-ray diffraction, scanning electron microscopy/energy-dispersive X-ray spectroscopy, and atomic force microscopy were employed to assess variations in performance and microstructure in present samples after repeated TE measurements. These characterizations revealed surface degradation and a decline in TE performance. Additionally, we explored transition metal doping to enhance TE performance. Among all transition-metal dopants, Mn proved to be the most effective in enhancing both TE performance and stability of Mg3(Sb, Bi)2-based compounds. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Magnesium, Energy Conversion and Storage |