Preparation and thermoelectric properties of pseudogap intermetallic (Ti1-xVx)NiSi solid solutions

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3 Citations (Scopus)

Abstract

We theoretically and experimentally investigated the thermoelectric (TE) properties of TiNiSi-based solid solutions with a pseudogap at the Fermi level in the electronic band structure. Calculation of the TE properties of TiNiSi predicted that electron doping of TiNiSi leads to a higher power factor than hole doping. According to this prediction, we prepared the partially V-substituted TiNiSi-based compounds (Ti1-xVx)NiSi (x = 0, 0.05, 0.10, 0.15, and 0.20) using arc-melting and subsequent spark plasma sintering. An increase in the V content x improved the n-type TE properties: the absolute values of the Seebeck coefficient and electrical conductivity both increased, while the thermal conductivity slightly decreased. The highest dimensionless figure-of-merit, zT, was 0.032 at 600 K, obtained for the x = 0.20 sample.

Original languageEnglish
Pages (from-to)111-116
Number of pages6
JournalJournal of Alloys and Compounds
Volume771
DOIs
Publication statusPublished - 2019 Jan 15

Keywords

  • Electronic structure
  • Pseudogap
  • Thermoelectric property
  • TiNiSi-type compound

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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