n-type (Zr,Ti)NiSn half Heusler materials via mechanical alloying: Structure, Sb-doping and thermoelectric properties

G. Mesaritis, I. Ioannou, A. Delimitis, E. Hatzikraniotis, Y. Gelbstein, Th Kyratsi

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Mechanical alloying has been applied, as an advantageous scalable method, to synthesize Ti1-xZrxNiSn half Heusler materials. This is the first time a synthesis of single phase n-type Ti1-xZrxNiSn half Heusler solid solutions is reported by this technique, along with structural studies and thermoelectric properties. The application of mechanical alloying was successful, as all compositions ranging between x = 0.4–0.8 were in general single phase materials. The lattice thermal conductivity of the series was lower compared to the same compositions prepared by arc melting. Ti0.4Zr0.6NiSn exhibited the minimum lattice thermal conductivity of the series and was selected for doping studies with Sb, with the scope to enhance the thermoelectric performance via the power factor modification. Thermoelectric property measurements resulted in a maximum figure of merit of 0.71 at 762K for Ti0.4Zr0.6NiSn doped with 1.5% Sb.

Original languageEnglish
Article number110735
JournalJournal of Physics and Chemistry of Solids
Volume167
DOIs
StatePublished - 1 Aug 2022

Keywords

  • Ball milling
  • Half Heusler
  • Solid solutions
  • Structural properties
  • Synthesis
  • Thermoelectric

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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