Effect of Ag+ doping and Ag addition on the thermoelectric properties of KSr2Nb5O15

Qian Chen, Ping Zhang, Zhihao Lou, Lingyun Gong, Shuyao Cao, Jie Xu, Jie Kong, Zinovi Dashevsky, Haixue Yan, Feng Gao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The electron and phonon thermal transport behavior of Ag + doped KSr2Nb5O15 were discussed by using the first-principles calculations. The band gap was reduced after Ag+ doping, and the electrons near the Fermi level had stronger transition capability, which effectively increased the carrier concentration and electrical conductivity and reduced the thermal conductivity, thereby improving the ZT of the doped KSr2Nb5O15 from 0.6298 to 0.7214 (1200 K) under ideal conditions. In addition, the solid-state reaction method was used to prepare Ag nanoparticle added KSr2Nb5O15 samples, and their thermoelectric performance was tested. The experimental results and the calculated results showed a good consistent trend in which Ag improved the thermoelectric properties of KSr2Nb5O15. When the amount of addition of nanosized Ag was 20 wt%, the power factor and ZT of the material were the highest at 1073 K, which were 0.228 mW/(K2·m) and 0.1090, respectively. This research shows how to improve the thermoelectric performance of KSr2Nb5O15 ceramics and broaden their temperature range for application.

Original languageEnglish
Pages (from-to)1731-1741
Number of pages11
JournalCeramics International
Issue number2
StatePublished - 15 Jan 2023


  • Ag doping
  • First-principles calculation
  • KSrNbO
  • Solid state reaction method
  • Thermoelectric properties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry


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