168208 20260128162438.0 doi 10.1016/j.jeurceramsoc.2015.05.029 sideral 100287 ART-2015-100287 eng Kahraman, F. Enhancement of mechanical and thermoelectric properties of Ca3Co4O9 by Ag addition 2015 Ca3Co4O9+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 0.43mW/K2m at 800°C have been achieved for the 10wt.% Ag samples which is much higher than the measured in the pure Ca3Co4O9 samples. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T12 info:eu-repo/grantAgreement/ES/DGA/T87 info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2013-46505-C3-1-R info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 2.933 2015 MATERIALS SCIENCE, CERAMICS 1 / 27 = 0.037 2015 Q1 T1 1.135 2015 Materials Chemistry 2015 Q1 Ceramics and Composites 2015 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Madre, M. A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Rasekh, S. (orcid)0000-0003-3466-9952 Salvador, C. Bosque, P. (orcid)0000-0003-2501-4479 Torres, M. A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Diez, J. C. Universidad de Zaragoza (orcid)0000-0001-9995-6368 Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 5002 305 Universidad de Zaragoza Dpto. Ingeniería Diseño Fabri. Área Expresión Gráfica en Ing. 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 35, 14 (2015), 3835-3841 J. Eur. Ceram. Soc. Journal of the European Ceramic Society 0955-2219 762524 http://zaguan.unizar.es/record/168208/files/texto_completo.pdf Postprint 1314162 http://zaguan.unizar.es/record/168208/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:168208 articulos driver 2026-01-28-15:37:52 ARTICLE