Search for p-type oxide thermoelectrics - cobaltites

Author

Fujishiro, H. ; Fujine, Y. ; Hejtmanek, J. ; Sedmidubsky, D. ; Maignan, A. ; Martin, C.

Author_Institution

Fac. of Eng., Iwate Univ., Morioka, Japan

fYear

2003

fDate

17-21 Aug. 2003

Firstpage

192

Lastpage

195

Abstract

The thermal conductivity, thermoelectric power, electrical resistivity and magnetization of the 3D perovskites Ln_1-xAE_XCoO₃ (Ln=La,Y and AE=Ca and Ba) and the low dimensional Ca₃Co₂O₆ and Ca₃Co₄O₉ cobaltites were measured in a wide temperature range up to 1000 K. As a novelty we demonstrate the prospective high power factor of the. Y_0.9Ca_0.1CoO₃ at high temperatures and, simultaneously, that in the La_1-XAE_XCoO₃ system the maximum Z and P values are observed at the phase boundary between the FM and SG state at X∼0.1 and exceed that reported for layered cobaltite ceramics.

Keywords

barium compounds; calcium compounds; cobalt compounds; electrical resistivity; lanthanum compounds; magnetisation; semiconductor materials; thermoelectricity; yttrium compounds; 1000 K; Ca₃Co₂O₆; Ca₃Co₄O₉; LaBaCoO₃; Ln_1-xAE_XCoO₃; Y_0.9Ca_0.1CoO₃; cobaltites; electrical resistivity; layered cobaltite ceramics; magnetization; p-type oxide thermoelectrics; thermal conductivity; thermoelectric power; Conductivity measurement; Electric resistance; Electric variables measurement; Magnetization; Power measurement; Temperature distribution; Thermal conductivity; Thermal factors; Thermal resistance; Thermoelectricity;

fLanguage

English

Publisher

ieee

Conference_Titel

Thermoelectrics, 2003 Twenty-Second International Conference on - ICT

Print_ISBN

0-7803-8301-X

Type

conf

DOI

10.1109/ICT.2003.1287481

Filename

1287481