Influence of Extrusion Temperature on the Thermoelectric Properties of p-Type Ag Added (Bi0.25Sb0.75)2Te3 Alloys Prepared by MA-PDS |
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| Journal | Key Engineering Materials (Volumes 336 - 338) |
|---|---|
| Volume | High-Performance Ceramics IV |
| Edited by | Wei Pan and Jianghong Gong |
| Pages | 846-849 |
| DOI | 10.4028/www.scientific.net/KEM.336-338.846 |
| Citation | Wang Kee Min et al., 2007, Key Engineering Materials, 336-338, 846 |
| Online since | April, 2007 |
| Authors | Wang Kee Min, Chang Ho Lee, Yong Ho Park, Ik Min Park |
| Keywords | Hot Extrusion, Mechanical Alloying (MA), Pulse Discharge Sintering, Thermoelectric Material |
| Abstract | The direct extrusion process using the powder as raw materials was applied to prepare the thermoelectric materials. The mechanically alloyed powders of Ag added (Bi0.25Sb0.75)2Te3 were extruded by pulse discharge sintering method in the temperature range of 345°C ~ 425°C. High quality products were obtained by hot-extrusion method and their texture and thermoelectric properties were measured. The intensity of (110) plane increased with extrusion temperature up to 385°C and altered in the range of above 405°Cwhich coincided with the variation of power factor. The measured Power factor ranged from 3.5 ~ 4.0 × 10-3 W/K2·m. The figure of merit (Z) of the material extruded at 385°C was 3.1 × 10-3 /K, the highest value among the prepared materials. |
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