| Autor: |
Jerzy S. Krasinski, Daryoosh Vashaee, Nikhil Satyala |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
2012 IEEE Green Technologies Conference. |
| DOI: |
10.1109/green.2012.6200960 |
| Popis: |
The thermoelectric (TE) properties of magnesium silicide (Mg2Si) fabricated through mechanical alloying and hot-pressing have been characterized by measurements of electrical resistivity (ρ), Seebeck coefficient (S) and thermal conductivity (κ) between 300 K and 970 K. TE samples of 2-at% Bi doped and 2-at% Al doped specimens were sintered at 1173 K and 1123 K, respectively. Structural analysis of the sintered samples was performed by scanning electron microscopy. The effect of inclusion of a minuscule quantity (0.25-vol%) of Mg-Si-B-R based conductive glass-frit in order to reduce the brittleness of samples has been investigated on the Al-doped Mg2Si samples. Power factors (S2σT) of greater than 2 W/mK were obtained from samples doped with Al. The samples mixed with conductive glass frit have also exhibited higher stability at temperatures greater than 900 K when compared to samples doped with Bi. The Mg2Si:Bi and Mg2Si:Al samples showed a maximum figure-of- merit (ZT) of 0.53 and 0.66 at 970 K, respectively. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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