Journal ArticleDOI
Synthesis and Characterization of Al-Doped Mg2Si Thermoelectric Materials
S. Battiston,S. Fiameni,Mohsin Saleemi,Stefano Boldrini,A. Famengo,Filippo Agresti,Marian Stingaciu,Muhammet S. Toprak,Monica Fabrizio,Simona Barison +9 more
TLDR
In this paper, the role of aluminum doping (Mg2Si:Al = 1:x for x = 0.005, 0.02, and 0.04 molar ratio) was investigated.Abstract:
Magnesium silicide (Mg2Si)-based alloys are promising candidates for thermoelectric (TE) energy conversion for the middle to high range of temperature. These materials are very attractive for TE research because of the abundance of their constituent elements in the Earth’s crust. Mg2Si could replace lead-based TE materials, due to its low cost, nontoxicity, and low density. In this work, the role of aluminum doping (Mg2Si:Al = 1:x for x = 0.005, 0.01, 0.02, and 0.04 molar ratio) in dense Mg2Si materials was investigated. The synthesis process was performed by planetary milling under inert atmosphere starting from commercial Mg2Si pieces and Al powder. After ball milling, the samples were sintered by means of spark plasma sintering to density >95%. The morphology, composition, and crystal structure of the samples were characterized by field-emission scanning electron microscopy, energy-dispersive spectroscopy, and x-ray diffraction analyses. Moreover, Seebeck coefficient analyses, as well as electrical and thermal conductivity measurements were performed for all samples up to 600°C. The resultant estimated ZT values are comparable to those reported in the literature for these materials. In particular, the maximum ZT achieved was 0.50 for the x = 0.01 Al-doped sample at 600°C.read more
Citations
More filters
Journal ArticleDOI
Thermoelectrics: From history, a window to the future
Davide Beretta,Davide Beretta,Neophytos Neophytou,James M. Hodges,Mercouri G. Kanatzidis,Dario Narducci,Marisol Martin Gonzalez,Matt Beekman,Benjamin Balke,Giacomo Cerretti,Wolfgang Tremel,Alexandra Zevalkink,Anna I. Hofmann,Christian Müller,Bernhard Dörling,Mariano Campoy-Quiles,Mario Caironi +16 more
TL;DR: A broad review of thermoelectric materials can be found in this article, where the authors discuss the major steps in the history of thermophysics, from the very early discovery to present technology.
Journal ArticleDOI
Thermoelectric Devices: A Review of Devices, Architectures, and Contact Optimization
Journal ArticleDOI
Concepts for medium-high to high temperature thermoelectric heat-to-electricity conversion: a review of selected materials and basic considerations of module design
TL;DR: In this article, the authors compare three classes of thermoelectric materials, all designed for medium-high to high temperature applications in the field of waste heat recovery: skutterudites, half-Heusler compounds, and silicon-based materials.
Journal ArticleDOI
Microstructural effects on thermoelectric efficiency: A case study on magnesium silicide
Johannes de Boor,Titas Dasgupta,Hendrik Kolb,Camille Compere,Klemens Kelm,Echard Mueller,Echard Mueller +6 more
TL;DR: In this article, the authors investigated the microstructural effects on thermoelectric transport in Mg2Si and found that small amounts of impurity phases can heavily impair electrical transport.
Journal ArticleDOI
Review of nanostructured devices for thermoelectric applications.
TL;DR: This review paper will put a particular emphasis on nanostructured silicon, which represents a valid compromise between good thermoelectric properties on one side and material availability, sustainability, technological feasibility on the other side.
References
More filters
Journal ArticleDOI
Effect of quantum-well structures on the thermoelectric figure of merit.
TL;DR: In this article, the authors proposed to use quantum-well superlattice structures to enhance the performance of thermoelectric coolers and showed that layering has the potential to increase significantly the figure of merit of a highly anisotropic material.
Journal ArticleDOI
Combined texture and structure analysis of deformed limestone from time-of-flight neutron diffraction spectra
TL;DR: In this paper, the orientation distribution of a textured polycrystalline material has been traditionally determined from a few individual pole figures of lattice planes hkl, measured by x-ray or neutron diffraction.
Journal ArticleDOI
Thermoelectric properties of Sb-doped Mg2Si semiconductors
Jun-ichi Tani,Hiroyasu Kido +1 more
TL;DR: The thermoelectric properties of Sb-doped Mg2Si have been characterized by Hall effect measurements at 300 K and by measurements of electrical resistivity (ρ), Seebeck coefficient (S), and thermal conductivity (κ) between 300 and 900 K as mentioned in this paper.
Journal ArticleDOI
Electronic structures of semiconducting alkaline-earth metal silicides
TL;DR: In this paper, the first-principle pseudopotential method was used to calculate the electronic structures and densities of the following alkaline-earth metal silicides using the first principle pseudoprocessor method.
Journal ArticleDOI
Thermoelectric Characteristics of a Commercialized Mg2Si Source Doped with Al, Bi, Ag, and Cu
Tatsuya Sakamoto,Tsutomu Iida,Atsunobu Matsumoto,Yasuhiko Honda,Takashi Nemoto,Junichi Sato,Tadao Nakajima,Hirohisa Taguchi,Yoshifumi Takanashi +8 more
TL;DR: In this paper, the thermoelectric properties of commercial polycrystalline Mg2Si doped with Bi, Al+Al-co-doped samples were compared with values calculated using ABCAP based on a full-potential augmented-plane-wave (FLAPW) band-structure calculation in a local density approximation.