INFLUENCE OF Sb- AND Al CONTENT ON THERMOELECTRIC PROPERTIES OF Sb-DOPED Mg2Si SYNTHESIZED IN Al2O3 CRUCIBLES (Comunicazione a convegno)

Type
Label
  • INFLUENCE OF Sb- AND Al CONTENT ON THERMOELECTRIC PROPERTIES OF Sb-DOPED Mg2Si SYNTHESIZED IN Al2O3 CRUCIBLES (Comunicazione a convegno) (literal)
Anno
  • 2015-01-01T00:00:00+01:00 (literal)
Alternative label
  • A. Famengo 1*, T.Sakamoto2, S. Battiston1, S.Fiameni1 , S.Boldrini1, A. Ferrario1, M. Fabrizio1, T. Iida2 (2015)
    INFLUENCE OF Sb- AND Al CONTENT ON THERMOELECTRIC PROPERTIES OF Sb-DOPED Mg2Si SYNTHESIZED IN Al2O3 CRUCIBLES
    in Giornate sulla Termoelettricità 2015, Milano, 18-19 Febbraio 2015
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Famengo 1*, T.Sakamoto2, S. Battiston1, S.Fiameni1 , S.Boldrini1, A. Ferrario1, M. Fabrizio1, T. Iida2 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1CNR-IENI, Corso Stati Uniti 4, 35127 Padova, Italy 2Department of Materials Science and Technology, Tokyo University of Science, 6-3-1, Niijuku, Katsushika-ku, Tokyo 125-8585, Japan (literal)
Titolo
  • INFLUENCE OF Sb- AND Al CONTENT ON THERMOELECTRIC PROPERTIES OF Sb-DOPED Mg2Si SYNTHESIZED IN Al2O3 CRUCIBLES (literal)
Abstract
  • In this research, the effect of Sb-doping amount on Mg2Si, obtained by melting of the elements in Al2O3 crucibles was investigated. An Al-uptake originated from alumina crucibles with consequent material doping, as the reaction Mg+Al2O3->2Al+3MgO is thermodynamically favoured. The charge carrier concentration can be adjusted adding appropriate Sb amounts, leading to a reproducible synthesis of Sb:Mg2Si materials using cheap and industrial available Al2O3 crucibles. The so-obtained polycrystalline Sb-doped Mg2Si were crushed and consolidated via spark plasma sintering, obtaining dense pellets (>98%) with different amounts of Sb (0.1, 0.3, 0.5, 0.7, 1.0, 1.5 at %). The pellets were further annealed in order to prevent cracks during heating/cooling cycles. The structure and the composition of these materials are studied with powder X-ray diffraction, field-emission scanning electron microscopy coupled with electron dispersive spectroscopy. The functional properties (Seebeck coefficient, electrical resistivity and mobility and thermal conductivity) were evaluated in the RT-600°C range. The thermoelectric performance is then related to the composition of the different Sb-doped Mg2Si samples. (literal)
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