High thermoelectric performance of niobium-doped strontium titanate bulk material affected by all-scale grain boundary and inclusions

Jun Wang, Xinxin Ye, Xinba Yaer, Boyu Zhang, Wen Ma, Lei Miao

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The large thermal conductivity of SrTiO3 bulk material limits its potential application for high-temperature thermoelectricity. The effects of all-scale grain boundaries and inclusions on the thermoelectric performance of Nb-doped bulk SrTiO3 materials are investigated in this study. Nano- to microscale grain boundaries and inclusions reduce the thermal conductivity by 30%. As a result, the ZT value is enhanced 2.6 times by a combination of all-sized crystals, energy filtering effect, multilevel scattering behaviors of nano/microscale grain boundaries and inclusions.

Original languageEnglish
Pages (from-to)25-28
Number of pages4
JournalScripta Materialia
Volume99
DOIs
Publication statusPublished - 2015 Apr 1
Externally publishedYes

Keywords

  • All-scale grain boundary
  • Molten salt synthesis
  • Niobium-doped strontium titanate
  • Thermoelectric

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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