Ca-doped RCoO3 (R = Gd, Sm, Nd, Pr) as thermoelectric materials

Authors
Moon, JW Seo, WS Okabe, H Okawa, T Koumoto, K
Citation
Jw. Moon et al., Ca-doped RCoO3 (R = Gd, Sm, Nd, Pr) as thermoelectric materials, J MAT CHEM, 10(9), 2000, pp. 2007-2009
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS CHEMISTRY
ISSN journal
09599428 → ACNP
Volume
10
Issue
9
Year of publication
2000
Pages
2007 - 2009
Database
ISI
SICI code
0959-9428(2000)10:9<2007:CR(=GS>2.0.ZU;2-3
Abstract
The electrical resistivity and Seebeck coefficient of (R0.9Ca0.1)CoO3 (R = Gd, Sm, Nd, Pr) rapidly decrease with increasing ionic radius of the rare-e arth element, and the Seebeck coefficients (p-type) are fairly high at low temperatures and attain low and constant values at high temperatures; (Pr0. 9Ca0.1)CoO3 shows the highest figure-of-merit, 1.3 x 10(-4) K-1 at 85 degre es C, although this rapidly decreases with temperature above 300 degrees C due to the decreasing Seebeck coefficient and increasing electronic thermal conductivity.