Liquidus Projections of Bi-Se-Ga and Bi-Se-Te Ternary Systems
| Autor: | Hsu-shen Chu, Sinn-wen Chen, Po-han Lin, Jenn-dong Hwang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science General Engineering 02 engineering and technology Liquidus 021001 nanoscience & nanotechnology Thermoelectric materials 01 natural sciences Miscibility Crystallography 0103 physical sciences Metallic materials Single phase 0210 nano-technology Thermal analysis Ternary operation Phase diagram |
| Zdroj: | Metallurgical and Materials Transactions E. 3:281-290 |
| ISSN: | 2196-2944 2196-2936 |
| DOI: | 10.1007/s40553-016-0090-0 |
| Popis: | This study determines the liquidus projections of both Bi-Se-Ga and Bi-Se-Te ternary systems which are constituent ternary systems of promising Bi-Se-Te-Ga thermoelectric materials. Ternary Bi-Se-Ga and Bi-Se-Te alloys are prepared. Their primary solidification phases are experimentally determined, and thermal analysis experiments are carried out. The liquidus projections are determined based on the ternary experimental results and phase diagrams of constituent binary systems. The Bi-Se-Ga system includes seven primary solidification phases, Bi, Ga, GaSe, Ga2Se3, Se, Bi2Se3, and (Bi2)n(Bi2Se3)m. In the Bi-Se-Te system, there are five primary solidification phases, Bi, (Bi2)n(Bi2Te3)m, Bi2(Se,Te)3, (Se,Te), and (Bi2)n(Bi2Se3)m. Both the (Bi2)n(Bi2Te3)m and (Bi2)n(Bi2Se3)m phases are not a single phase, but a collection of series undetermined phases. Large miscibility gaps are observed in the Bi-Se-Ga system. The temperatures of the invariant reactions, Liquid + Bi + GaSe = Ga and Liquid + Ga2Se3 = Bi + GaSe, are at 495 K (222 °C) and 533 K (260 °C), respectively. |
| Databáze: | OpenAIRE |
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