The thermoelectric properties of [Ca2CoO3] 0.62[CoO2] textured ceramics

X. Y. Huang, Yuzuru Miyazaki, Kunio Yubuta, Y. Oide, T. Kajitani

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

2 Citations (Scopus)

Abstract

Large and high-quality single crystal flakes of [Ca2CoO 3]0.62[CoO2] compound were grown from Co 3O4 and CaCO3 reagents with chloride flux. Typical single crystal flake size is about 5times;5times;0.02 mm3. Obtained crystal flakes were consolidated by the spark plasma sintering (SPS) technique at 1100 K for 1 h. Grain alignment was checked by XRD and also was confirmed by SEM observations on the fractured surface. At 1000 K electrical conductivity of the textured ceramics is about 270 Scm-1, twice as higher than that of powder sample sintered by the SPS procedure. ZT value of the textured sample reaches 0.4 at 1000 K, being 50% improvement relative to the powder-sintered sample, though thermal conductivity increases simultaneously.

Original languageEnglish
Title of host publicationProceedings ICT'06 - 25th International Conference on Thermoelectrics
Pages89-91
Number of pages3
DOIs
Publication statusPublished - 2006 Dec 1
EventICT'06 - 25th International Conference on Thermoelectrics - Vienna, Austria
Duration: 2006 Aug 62006 Aug 10

Publication series

NameInternational Conference on Thermoelectrics, ICT, Proceedings

Other

OtherICT'06 - 25th International Conference on Thermoelectrics
CountryAustria
CityVienna
Period06/8/606/8/10

ASJC Scopus subject areas

  • Engineering(all)

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