Thermoelectric properties of Zn- and Ce-alloyed In2O3and the effect of SiO2nanoparticle additives

Cheng Lun Hsin, Jen Che Hsiao, You Ming Chen, Sheng Wei Lee

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Thermoelectric materials are considered promising candidates for thermal energy conversion. This study presents the fabrication of Zn- and Ce-alloyed In2O3 with a porous structure. The electrical conductivity was improved by the alloying effect and an ultra-low thermal conductivity was observed owing to the porous structure, which concomitantly provide a distinct enhancement of ZT. However, SiO2 nanoparticle additives react with the matrix to form a third-phase impurity, which weakens the electrical conductivity and increases the thermal conductivity. A thermoelectric module was constructed for the purpose of thermal heat energy conversion. Our experimental results proved that both an enhancement in electrical conductivity and a suppression in thermal conductivity could be achieved through nano-engineering. This approach presents a feasible route to synthesize porous thermoelectric oxides, and provides insight into the effect of additives; moreover, this approach is a cost-effective method for the fabrication of thermoelectric oxides without traditional hot-pressing and spark-plasma-sintering processes.

Original languageEnglish
Article number135712
JournalNanotechnology
Volume33
Issue number13
DOIs
StatePublished - 26 Mar 2022

Keywords

  • InO
  • SiOadditives
  • alloy
  • nanoparticle
  • thermoelectric materials

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