August 28, 2022 to September 1, 2022
Serbian Academy of Sciences and Arts – SASA
Europe/Belgrade timezone

Formation of Silver Selenide and Copper Selenide synthesized by Pack Cementation and Mechanical alloying processes

S11-EPASE-211
Aug 29, 2022, 6:00 PM
1h 30m
Lobby (Faculty of Physics)

Lobby

Faculty of Physics

Board: S11-EPASE-211
Poster presentation S11 Environmental Physics – Alternative Sources of Energy Poster session

Speaker

Dimitrios Stathokostopoulos (Aristotle University of Thessaloniki)

Description

Τhere is a strong demand for new energy sources due to the growing population and limited natural resources. Among the different renewable energy resources, thermoelectric material plays a key role. Selenides compounds, such as Ag2Se and Cu2Se, have received a lot of attention because of their interesting properties, low toxicity, and abundance. Particurarlly, Ag, Cu, and Se are less toxic than Bi, Pb, Sb, and Te, while Se is about 10 times more abundant than Te. High-energy ball milling1,2 , (HEBM) process is a powerful solid-state synthesis/powder mechanical alloying method. Chemical Vapor Deposition by Pack Cementation (CVDPC) is an ideal synthesis procedure because it is simple, easily controllable and inexpensive . The objective of this work is to synthesize Ag2Se and Cu2Se compounds by using two different techniques: HEBM and CVDPC processes. In HEBM a series of experiments were carried out by various milling times (from 1h to 20 hrs). In CVDPC process two different deposition times (3 and 4 hours) was selected at $238^ο C$ heating temperature.

The structural and morphological characterization of the selenides were studied by Fourier Transform Infrared Spectroscopy, X-ray Diffraction, X-ray Photoelectron Spectroscopy and Scanning Electron Microscopy. It was found that the selenides were successfully synthesized by HEBM and pack cementation process.

Acknowledgments: This research was carried out as part of the project «Design and implementation of innovative lift's air-conditioning systems by using thermoelectric devices» (Project code: ΚΜΡ6-0074109) under the framework of the Action «Investment Plans of Innovation» of the Operational Program «Central Macedonia 2014 2020», that is co-funded by the European Regional Development Fund and Greece.

References
1. W.K. Min et al., Materials Science Forum, 534-536 (2007).
2. C. Lee et al., J Appl. Phys. 101, 024920 (2007)
3. D. Stathokostopoulos et al., Results in Materials 13, 00252 (2022)

Primary authors

Dimitrios Stathokostopoulos (Aristotle University of Thessaloniki) Dr Evangelia Tarani (School of Physics, Faculty of Science, Aristotle University Thessaloniki) Dr Lamprini Malletzidou (Aristotle University of Thessaloniki, School of Physics, Faculty of Sciences) Dr Ioanna Sfampa (KLEEMANN Group R&D, Innovation Department, Industrial Area of Kilkis, PO Box 25, 611 00, Kilkis, Greece) Prof. Fani Stergioudi (Aristotle University of Thessaloniki, School of Engineering, Mechanical Engineering Department) Prof. Nikolaos Michailidis (Aristotle University of Thessaloniki, School of Engineering, Mechanical Engineering Department) Prof. Konstantinos Chrissafis (Aristotle University of Thessaloniki, School of Physics, Faculty of Sciences) Prof. George Vourlias (Aristotle University of Thessaloniki, School of Physics, Faculty of Sciences)

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