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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications VIII
Presentation Title Heat Stability of Mg2Si1-xSnx as Affected by Heat Treatment Temperature and Duration
Author(s) Mahdi Mejri, Yohann Thimont, Benoit Malard, Claude Estournes
On-Site Speaker (Planned) Mahdi Mejri
Abstract Scope A thermoelectric generator is a static and autonomous system that converts thermal energy into electrical energy and vice-versa. Degenerated semiconductors, including Mg2Si1-xSnx belong to the family of the most promising thermoelectric materials for medium temperature applications. Fully dense Mg2Si1-xSnx based materials have been elaborated using spark plasma sintering process. After sintering, due to the short time process, they present heterogeneities of composition. In order to stabilize them, heat treatments were carried out at different temperatures and holding times. Annealing at 750°C for 3 hours, the material remains biphasic with the presence of a Si rich phase (x→0.1) distributed in a matrix Sn rich one (x→0.6). Porosities were evidence due to Sn diffusion leading to Kirkendall effect. A swelling of the material was observed due to the change in composition and porosities creation. The microstructure and properties of the different materials will be discussed.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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Accelerated Discovery of Efficient Solar-cell Materials using Quantum and Machine-learning Methods
Approaches to Manipulate p-n Conduction Transition and High Thermoelectric Performance in Ga-incorporated Bi2Te3
Assessment of Interface in Bi2Te3 and Sb2Te3 Thin Film Thermoelectric Modules
Black Phosphorus and Semiconducting Transition Metal Dichalcogenides in Contact with Transparent Conductive Oxides for High Efficiency Solar Cells
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D-4: Assessment of Co-P Diffusion Barrier for Bismuth Telluride-based Thermoelectric Materials
D-6: Phase Diagram of Bi-Cu-Te and Thermoelectric Properties of Cu Doped Bi2Te3 Alloys
D-7: Phase Diagrams of Ag-Pb-Sn-Te System
D-8: Realizing the Microstructure in GeTe-based Thermoelectric Materials and Phase Transition Behavior
D-9: Thermoelectric Properties of Multiply Doped Mg3(Sb, Bi)2
Defect Formation Energies and Effective Masses in the Mg2(Si,Sn) Solid Solutions via DFT Calculations
Enhanced Averaged zT in n-type Bi2Te3 via Solubility Control
Gradient Composition Layered Microstructure Development in Thermoelectric Mg2(Si,Sn) Alloys Based on Phase Equilibrium
Heat Stability of Mg2Si1-xSnx as Affected by Heat Treatment Temperature and Duration
High Reliability Package of Perovskite Solar Cell by SiNx Passivation Layer with Sn-Bi-In Low-melting Solder
Interfacial Reactions Between Bi2Te3 Substrate with Cu, In, Sn and Ni
Laser Additive Manufacturing of Bismuth Telluride and Silicide Thermoelectric Materials
Lattice Hardening Due to Vacancy Diffusion in (GeTe)mSb2Te3 Alloys
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Optimization of Thermoelectric Performance of Nitrogen- and Boron-doped Carbon Nanotubes
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Phase Diagrams of Ag-Cu-Te Ternary System and Ag2Te/Cu Interfacial Reaction
Polar Tintermetallics as High Temperature Thermoelements
Portable Nanostructured Magneto-Thermoelectric Bi-Sb Alloys at Cryogenic Temperatures
Realizing the Compositional Homogeneity in GeTe-based Thermoelectric Materials and Phase Transition Behavior
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Synthesis, Processing and Characterizations of Functional Materials for Industrial Applications
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Thermoelectric Films Deposited by Pulsed Magnetron Sputtering
Thermoelectric Half Heusler Systems {Nb,Ta}FeSb - Ti1+xFe1.33-xSb
Thermoelectric Properties of p-type Mg Doped CuMO2 Delafossite Thin Films and Modules
Transmission Electron Microscopy Study of Hole-selective Contacts Employed in Silicon Solar Cells
Using Energy Filtering to Change the Thermoelectric Design Paradigm
Utilizing Magnetism and Dilute Magnetic Semiconductors to Enhance Thermoelectric Performance
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