High-temperature thermoelectric behaviors of highly dense polycrystalline nonstoichiometry titanium oxide ceramics

Yong Liu, Jinle Lan, Bo Ping Zhang, Hongmin Zhu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polycrystalline nonstoichometry titanium oxide, TiOx(x=1.6-1.9) ceramics with high density were prepared by a spark plasma sintering process at 1373 K using TiO2 and TiO as starting materials. The temperature dependences of the electrical conductivity, Seebeck coefficient, and power factor have been investigated. The results indicate that the electrical conductivity of all the samples is in the range of a semiconductor (51 S cm -1∼360 S cm-1), increases with temperature increasing, and decreases with oxygen content increasing. All samples show high negative Seebeck coefficients (-50∼-375 μVK-1), reveals that the primary carriers are electrons. Power factor of all samples increased with temperature increasing. The maximum power factor value of 5×10 -4 Wm-1K-2 has been obtained in TiO 1.6 ceramic at 873K, indicating the titanium oxide system could be a promising candidate for high-temperature thermoelectric application.

Original languageEnglish
Title of host publicationTMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
Pages9-15
Number of pages7
Publication statusPublished - 2010 May 21
Externally publishedYes
EventTMS 2010 - 139th Annual Meeting and Exhibition - Seattle, WA, United States
Duration: 2010 Feb 142010 Feb 18

Publication series

NameTMS Annual Meeting
Volume3

Other

OtherTMS 2010 - 139th Annual Meeting and Exhibition
CountryUnited States
CitySeattle, WA
Period10/2/1410/2/18

Keywords

  • Power factor
  • Thermoelectric
  • Titanium oxide seebeck coefficient

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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  • Cite this

    Liu, Y., Lan, J., Zhang, B. P., & Zhu, H. (2010). High-temperature thermoelectric behaviors of highly dense polycrystalline nonstoichiometry titanium oxide ceramics. In TMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings (pp. 9-15). (TMS Annual Meeting; Vol. 3).