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Effect of Cu by Co substitution on Ca3Co4O9 thermoelectric ceramics

AuthorsRasekh, Sh.; Torres, M. A.; Constantinescu, G.; Madre, M. A.; Diez, J. C.; Sotelo, A.
Issue Date2013
CitationJournal of Materials Science: Materials in Electronics 24(7): 2309-2314 (2013)
AbstractCa3Co4-xCuxO9 polycrystalline thermoelectric ceramics with small amounts of Cu have been synthesized by the classical solid state method. X-ray diffraction data have shown that all the Cu has been incorporated into the Ca3Co4O9 structure and no Cu-containing secondary phases have been produced. Apparent density measurements have shown that all samples are very similar, with densities around 75 % of the theoretical one. Electrical resistivity decreases when Cu content increases until x = 0.03 while Seebeck coefficient remains practically constant for all samples. The improvement in resistivity leads to higher power factor values than the obtained for the undoped samples. © 2013 Springer Science+Business Media New York.
Publisher version (URL)http://dx.doi.org/10.1007/s10854-013-1094-5
Identifiersdoi: 10.1007/s10854-013-1094-5
issn: 0957-4522
e-issn: 1573-482X
Appears in Collections:(ICMA) Artículos
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