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dc.contributor.authorPolymeris, G. S.en
dc.contributor.authorVlachos, N.en
dc.contributor.authorKhan, A. U.en
dc.contributor.authorHatzikraniotis, E.en
dc.contributor.authorLioutas, C. B.en
dc.contributor.authorDelimitis, A.en
dc.contributor.authorPavlidou, E.en
dc.contributor.authorParaskevopoulos, K. M.en
dc.contributor.authorKyratsi, Theodoraen
dc.creatorPolymeris, G. S.en
dc.creatorVlachos, N.en
dc.creatorKhan, A. U.en
dc.creatorHatzikraniotis, E.en
dc.creatorLioutas, C. B.en
dc.creatorDelimitis, A.en
dc.creatorPavlidou, E.en
dc.creatorParaskevopoulos, K. M.en
dc.creatorKyratsi, Theodoraen
dc.description.abstractA study was attempted on the structural properties across all relevant length-scales for Mg2(Si,Sn,Ge)-type solid solutions of the formula Mg2Si0.55- ySn0.40Ge0.05(Bi,Sb)y. The study focuses on three families of samples, namely one undoped compound, as well as two families of doped samples, one at Bi (y = 0.02) and one doped at Sb (y = 0.0125)en
dc.description.abstractthe latter two materials were chosen because they yielded the highest ZT values. The results of the present study strongly suggest that, besides the main matrix and the MgO, there are three groups of secondary phases extending with uniform composition from nano-scale to macro-scale, as observed by high-resolution transmission electron microscopy (atomic scale), transmission electron microscopy (nano-scale), scanning electron microscopy coupled with energy-dispersive X-ray analysis (micro-scale) and X-ray diffraction (macro-scale): all these length-scale observations verified the presence of hierarchical structure extending down to a few nanometers, with uniform, narrow distribution of nano-particles, even in the case of MgO. Phase separation is strongly stimulated and modulated by doping. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.en
dc.sourceActa Materialiaen
dc.subjectNano scaleen
dc.subjectThermoelectric materialsen
dc.subjectThermo-Electric materialsen
dc.subjectAtomic scaleen
dc.subjectMacro scaleen
dc.subjectMicro scaleen
dc.titleNanostructure and doping stimulated phase separation in high-ZT Mg2Si0.55Sn0.4Ge0.05 compoundsen
dc.description.endingpage293Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering
dc.contributor.orcidKyratsi, Theodora [0000-0003-2916-1708]

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