Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material

Boyu Zhang, Jun Wang, Xinba Yaer, Zhenzhen Huo, Yin Wu, Yan Li, Lei Miao, Chengyan Liu, Tao Zou, Wen Ma

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Effect of crystal size distribution on thermoelectric performance of Lanthanum-doped strontium titanate (La-SrTiO3) ceramics are investigated in this study. Thermoelectric performance measurement, coupled with microstructure studies, shows that the electrical conductivity strongly depends on the crystal size, potential barrier on the grain boundary and porosity. Meantime, because the average potential barriers height are increased along with the reduction of crystal size, the Seebeck coefficients are increased by energy filtering effect at the large number of grain boundaries. As a result, by controlling of crystal size distribution, ZT value of La-SrTiO3 is improved.

Original languageEnglish
Article number1550070
JournalFunctional Materials Letters
Volume8
Issue number6
DOIs
Publication statusPublished - 2015 Dec 1
Externally publishedYes

Keywords

  • crystal size
  • hydrothermal synthesis
  • molten salt synthesis
  • Strontium titanate
  • thermoelectric material

ASJC Scopus subject areas

  • Materials Science(all)

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