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- Title
DILATOMETRIC ANALYSIS OF THE SINTERING BEHAVIOR OF Bi<sub>2</sub>Te<sub>3</sub> THERMOELECTRIC POWDERS.
- Authors
JU-YEON HAN; JONG MIN BYUN; YOUNG-IN LEE; BYUNG JOON CHOI; HOGYOUNG KIM; SUNG-TAG OH
- Abstract
The sintering behavior of p-type bismuth telluride powder is investigated by means of dilatometric analysis. The alloy powders, prepared by ball milling of melt-spun ribbons, exhibit refined and flake shape. Differential thermal analysis reveals that the endothermic peak at about 280°C corresponds to the melting of bismuth, and peaks existing between 410°C and 510°C are presumably due to the oxidation and crystallization of the powder. The shrinkage behavior of ball-milled powders was strongly dependent of heating rate by the thermal effect exerted on specimens. In the case of 2°C/min, the peak temperature for the densification is measured at 406°C, while the peak temperature at a heating rate of 20°C/min is approximately 443°C. The relative density of specimen pressureless-sintered at 500oC exhibited relatively low value, and thus further study is required in order to increase the density of sintered body.
- Publication
Archives of Metallurgy & Materials, 2020, Vol 65, Issue 3, p1117
- ISSN
1733-3490
- Publication type
Article
- DOI
10.24425/amm.2020.133227