Abnormal Crystal Growth in the Sintered (Bi0.2Sb0.8)2Te3 Alloys Induced by Silver Addition |
|
| Journal | Materials Science Forum (Volumes 449 - 452) |
|---|---|
| Volume | Designing, Processing and Properties of Advanced Engineering Materials |
| Edited by | S.-G. Kang and T. Kobayashi |
| Pages | 237-240 |
| DOI | 10.4028/www.scientific.net/MSF.449-452.237 |
| Citation | Hyun Jae Yoo et al., 2004, Materials Science Forum, 449-452, 237 |
| Online since | March, 2004 |
| Authors | Hyun Jae Yoo, Yong Ho Park, Ik Min Park |
| Keywords | (Bi,Sb)2Te3, Mechanical Alloying (MA), Pulse Discharge Sintering, Thermoelectric Material |
| Abstract | The bulk (Bi0.2iSb0.8)2Te3 thermoelectric alloys added with Ag up to 2.0 mass% were prepared by mechanical alloying and pulse discharge sintering (MA-PDS). Microstructures of the sintered samples were investigated. In the two samples with 1.0 and 2.0 mass% Ag, an abnormal growth of the (Bi,Sb)2Te3 phase, manifested by the formation of coarse crystals that are visible with eye, has been revealed during the PDS process of the alloyed powders. The local temperature rise in the compact induced by the compositional fluctuation as a result of Ag addition was suggested to be responsible for the observed abnormal growth. In addition, the electrical transport properties, i.e., electrical resistivity and Seebeck coefficient, of the sintered samples were studied. |
| Full Paper | 
Get the full paper by clicking here
|
First page example
