Thermogravimetric study and high-temperature thermoelectric properties of [Ca2(Co1-xAx)O3] 0.62CoO2

Y. Oide, Yuzuru Miyazaki, Y. Ono, X. Y. Huang, T. Kajitani

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

Systematic ion substitution has been performed on the Co site in the rock-salt (RS)-type [Ca2CoO3] subsystem of misfit-layered cobalt oxide [Ca2(Co1-xAx)O 3-δ]0.62CoO2 (A = Nb, Ru, Ta, Pb, W, La and Zr). The oxygen deficiency δ and the decomposition temperature T d of the substituted samples have been determined by means of the thermogravimetric analysis (TGA). Upon heating, the oxygen atoms are gradually released from the RS-type subsystem up to δ∼0.10, A small amount (x = 0.10) of the substitution remarkably increases Td from 1173 K (x = 0) up to 1246 K (A = Nb). The Pb-substituted samples show substantial decrease in electrical resistivity ρ froth 19.2 mΩcm to 13.8 mΩcm (x = 0.10) at 950 K. The highest thermoelectric power, S2 ρ-1 = 2.1×10-4 WK-2m-1, is realized for the Pb-substituted sample with x = 0.10 at 950 K.

本文言語English
ホスト出版物のタイトルProceedings ICT'06 - 25th International Conference on Thermoelectrics
ページ402-405
ページ数4
DOI
出版ステータスPublished - 2006 12 1
イベントICT'06 - 25th International Conference on Thermoelectrics - Vienna, Austria
継続期間: 2006 8 62006 8 10

出版物シリーズ

名前International Conference on Thermoelectrics, ICT, Proceedings

Other

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

ASJC Scopus subject areas

  • 工学(全般)

フィンガープリント

「Thermogravimetric study and high-temperature thermoelectric properties of [Ca<sub>2</sub>(Co<sub>1-x</sub>A<sub>x</sub>)O<sub>3</sub>] <sub>0.62</sub>CoO<sub>2</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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