Design of ball-milling experiments on Bi2Te3 thermoelectric material
Ημερομηνία
2013Source
Journal of Electronic MaterialsVolume
42Pages
1652-1660Google Scholar check
Keyword(s):
Metadata
Εμφάνιση πλήρους εγγραφήςΕπιτομή
In this work, factorial ball-milling experiments have been applied to Bi2Te3 material, for the first time, aiming to investigate the effect of the main process parameters on the structural features and thermoelectric properties of the ball-milled materials. The selected main parameters were the duration of milling, the speed and the ball-to-material ratio. Analysis suggests a strong effect of the speed and duration of processing, whereas the ball-to-material ratio is of minor importance. This approach is advantageous for better understanding of the milling mechanism and the importance of the role of each independent parameter as well as their interaction. All experiments led to nanocrystalline Bi2Te 3, whose structural features were studied. The nanocrystalline size was estimated based on x-ray diffraction analysis, while transmission electron microscopy (TEM) studies were also performed to confirm the presence of nanoscale crystals. A mathematical model was developed based on statistical analysis for prediction of the crystalline size and the Seebeck coefficient of the nanopowders. The thermoelectric properties were also investigated on selected, highly dense pellets fabricated via hot-pressing of the nanopowders. © 2012 TMS.
Collections
Cite as
Related items
Showing items related by title, author, creator and subject.
-
Conference Object
Design of an Air-Cooled Thermoelectric Generator through Modeling and Simulation, for use in Cement Industries
Charilaou, K.; Kyratsi, Theodora; Louca, Loucas (2019)
-
Article
Low Temperature Synthesis as a Route for Highly Thermoelectric Efficient Na-Doped PbTe
Papageorgiou, Chryssi; Delimitis, Andreas; Symeou, Elli; Giapintzakis, Ioannis; Kyratsi, Theodora (2018)In this work, Na-doped PbTe is synthesized through a low temperature synthesis technique. This method provides highly efficient p-type PbTe using a synthesis temperature much lower than the PbTe melting point and as low ...
-
Article
Recycling Si-kerf from photovoltaics: A very promising route to thermoelectrics
Mesaritis, G.; Symeou, E.; Delimitis, A.; Oikonomidis, S.; Jaegle, M.; Tarantik, K.; Nicolaou, Ch.; Kyratsi, Theodora (2019)Large scale photovoltaic technology require Si wafers and cutting process has the significant disadvantage of disposing typically more than 50% of high purity material as waste kerf. Recycling silicon kerf is of increasing ...