Abstract
Bulk mechanical alloying (BMA) has been successfully applied to solid-state synthesis of p-type and n-type thermoelectric materials Mg2Si 1-xSnx (x = 0, 0.2, 0.4, 0.6, 0.8, 1) from element-powders at the room temperature in a relatively short time. The electrical conductivity, the Seebeck coefficient and the thermal conductivity of the Mg2Si1-xSnx are quite sensitive to the x-content. With the x-content rising, the electrical conductivity increases. When x = 0.6, it reaches the lowest and Mg2Si shows an n-type of semi-conducting. However, when x = 0.2 and T > 525 K, the Seebeck coefficient of the samples will change the opposite way. While x≥0.4, the samples present a p-type of semi-conducting. The figure of merit, Z of Mg 2Si1-xSnx will be obtained in the range from 300 K to 700 K. When x = 0.6, Z proves to be higher than that of other samples at 300 K≤T≤650 K.
Original language | English |
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Pages (from-to) | S134-S138 |
Journal | Chinese Journal of Aeronautics |
Volume | 19 |
Issue number | SUPPL. |
Publication status | Published - 2006 Dec |
Externally published | Yes |
Keywords
- Bulk mechanical alloying
- Mg SiSn
- Solid-state synthesis
- Thermoelectric
ASJC Scopus subject areas
- Aerospace Engineering
- Mechanical Engineering