Effect of Heat Treatment on the Thermoelectric Properties of Bismuth–Antimony–Telluride Prepared by Mechanical Deformation and Mechanical Alloying
| Autor: | Deukhee Lee, Dong-Ik Kim, Jin-Sang Kim, Jae Uk Lee, Sung-Jin Jung, Ju-Heon Kim, Dow-Bin Hyun, Seung Hyub Baek |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Antimony telluride
Materials science Annealing (metallurgy) Metallurgy Analytical chemistry chemistry.chemical_element Condensed Matter Physics Thermoelectric materials Microstructure Electronic Optical and Magnetic Materials Bismuth chemistry.chemical_compound chemistry Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Materials Chemistry Electrical and Electronic Engineering |
| Zdroj: | Journal of Electronic Materials. 43:2255-2261 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-014-3037-1 |
| Popis: | In this work, p-type 20%Bi2Te3–80%Sb2Te3 bulk thermoelectric (TE) materials were prepared by mechanical deformation (MD) of pre-melted ingot and by mechanical alloying (MA) of elemental Bi, Sb, and Te granules followed by cold-pressing. The dependence on annealing time of changes of microstructure and TE properties of the prepared samples, including Seebeck coefficient, electrical resistivity, thermal conductivity, and figure-of-merit, was investigated. For both samples, saturation of the Seebeck coefficient and electrical resistivity were observed after annealing for 1 h at 380°C. It is suggested that energy stored in samples prepared by both MA and MD facilitated their recrystallization within short annealing times. The 20%Bi2Te3–80%Sb2Te3 sample prepared by MA followed by heat treatment had higher a Seebeck coefficient and electrical resistivity than specimens fabricated by MD. Maximum figures-of-merit of 3.00 × 10−3/K and 2.85 × 10−3/K were achieved for samples prepared by MA and MD, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink