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

X. Y. Huang; Y. Miyazaki; K. Yubuta; Y. Oide; T. Kajitani

doi:10.1109/ICT.2006.331287

The thermoelectric properties of [Ca₂CoO₃] _0.62[CoO₂] textured ceramics

X. Y. Huang, Y. Miyazaki, K. Yubuta, Y. Oide, T. Kajitani

ENG - Applied Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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 language	English
Title of host publication	Proceedings ICT'06 - 25th International Conference on Thermoelectrics
Pages	89-91
Number of pages	3
DOIs	https://doi.org/10.1109/ICT.2006.331287
Publication status	Published - 2006
Event	ICT'06 - 25th International Conference on Thermoelectrics - Vienna, Austria Duration: 2006 Aug 6 → 2006 Aug 10

Publication series

Name	International Conference on Thermoelectrics, ICT, Proceedings

Conference

Conference	ICT'06 - 25th International Conference on Thermoelectrics
Country/Territory	Austria
City	Vienna
Period	06/8/6 → 06/8/10

Access to Document

10.1109/ICT.2006.331287

Cite this

@inproceedings{fb6846840fd94015a8a6f2287bd3f91a,

title = "The thermoelectric properties of [Ca2CoO3] 0.62[CoO2] textured ceramics",

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.",

author = "Huang, {X. Y.} and Y. Miyazaki and K. Yubuta and Y. Oide and T. Kajitani",

year = "2006",

doi = "10.1109/ICT.2006.331287",

language = "English",

isbn = "1424408105",

series = "International Conference on Thermoelectrics, ICT, Proceedings",

pages = "89--91",

booktitle = "Proceedings ICT'06 - 25th International Conference on Thermoelectrics",

note = "ICT'06 - 25th International Conference on Thermoelectrics ; Conference date: 06-08-2006 Through 10-08-2006",

}

Huang, XY, Miyazaki, Y, Yubuta, K, Oide, Y & Kajitani, T 2006, The thermoelectric properties of [Ca₂CoO₃] _0.62[CoO₂] textured ceramics. in Proceedings ICT'06 - 25th International Conference on Thermoelectrics., 4133243, International Conference on Thermoelectrics, ICT, Proceedings, pp. 89-91, ICT'06 - 25th International Conference on Thermoelectrics, Vienna, Austria, 06/8/6. https://doi.org/10.1109/ICT.2006.331287

The thermoelectric properties of [Ca₂CoO₃] _0.62[CoO₂] textured ceramics. / Huang, X. Y.; Miyazaki, Y.; Yubuta, K. et al.
Proceedings ICT'06 - 25th International Conference on Thermoelectrics. 2006. p. 89-91 4133243 (International Conference on Thermoelectrics, ICT, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Kajitani, T.

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N2 - 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.

AB - 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.

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