Influence of Thermo-Mechanical Heat Treatment on the Thermoelectric Properties of Ag Added Bi1Sb3Te6 Compounds
|
| Journal |
Solid State Phenomena (Volume 118) |
| Volume |
Heat Treatment of Materials |
| Pages |
47-52 |
| DOI |
10.4028/www.scientific.net/SSP.118.47 |
| Online since |
December, 2006 |
| Authors |
Wang Kee Min,
Sung Doo Hwang,
Chang Ho Lee,
Yeong Do Park,
Yong Ho Park,
Ik Min Park
|
| Keywords |
BiSbTe, Heat Treatment, Hot Extrusion, Sintering, Thermoelectric Material |
| Abstract |
The direct extrusion process using the mechanically alloyed powder as raw materials was
applied to prepare the thermoelectric materials. The mechanically alloyed powders of Ag added
Bi1Sb3Te6 were extruded using pulse discharge sintering method at temperatures ranging from
345°C to 425°C. The fractographs of extruded specimens shows that no grain size changes was
observed until 385°C, but became coarser with the increase of the extrusion temperature above
405°C. The X-ray diffraction patterns showed that the intensity of (110) plane increased with
extrusion temperature up to 385°C and started to drop down above 405°C. The power factor value
(PF) also increased with the extrusion temperature up to 385°C and altered above 405°C. These
trends agreed with the variation in intensity of (110) plane of XRD patterns. The figure of merit (Z)
value of the extruded specimens at 385°C was 3.1 × 10-3 W/K, which was the highest value among
the prepared specimens. |
| Full Paper |
Get the full paper by clicking here
|
| Preview |
Free first page example |
