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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/147688
Título

Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition

AutorKahraman, F.; Madre, M. A.; Rasekh, Sh.; Salvador, C.; Bosque, P.; Torres, M. A.; Diez, J. C.; Sotelo, A.
Palabras claveThermoelectricity
Flexural strength
Ca3Co4O9
Fecha de publicación2015
EditorElsevier
CitaciónJournal of the European Ceramic Society 35(14): 3835-3841 (2015)
ResumenCa3Co4O9 + x wt.% Ag (x = 0, 1, 3, 5, and 10) polycrystalline thermoelectric ceramics have been prepared by a sol–gel route via nitrates followed by high temperature treatment before sintering. Out-of-plane XRD data have shown that major phase is the Ca3Co4O9 one, accompanied by metallic Ag. SEM observations have agreed with the XRD data. Apparent density measurements have revealed that all samples possess densities ranging between 80% and 90% when Ag content is raised. Mechanical properties have shown a drastic increase of bending stress when Ag is added to the samples. Electrical resistivity decreases with the Ag content, compared with the pure ones, while Seebeck coefficient slightly decreases. Maximum power factor values around 0.43 mW/K2 m at 800 °C have been achieved for the 10 wt.% Ag samples which is much higher than the measured in the pure Ca3Co4O9 samples.
Versión del editorhttps://doi.org/10.1016/j.jeurceramsoc.2015.05.029
URIhttp://hdl.handle.net/10261/147688
DOI10.1016/j.jeurceramsoc.2015.05.029
Identificadoresdoi: 10.1016/j.jeurceramsoc.2015.05.029
e-issn: 1873-619X
issn: 0955-2219
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