168152 20260128112906.0 sideral 146870 ART-2018-146870 eng Çetin Karakaya, G. Improvement of Bi2Sr2Co2Oy thermoelectric performances by Na doping 2018 Access copy available to the general public Unrestricted Bi2Sr2-xNaxCo2Oy thermoelectric materials with x = 0, 0.025, 0.05, 0.075, 0.10, 0.125, and 0.15 have been prepared by the classical solid state reaction. Microstructure has shown an important grain growth when Na is added, leading to very high bulk densities confirmed through density measurements. These modifications have produced a drastic decrease of electrical resistivity without significant modification of Seebeck coefficient. As a consequence, Power Factor has been increased in all Na-doped samples, reaching the maximum value (0.21 mW/K2.m at 650 °C) for 0.075 Na samples, which is fairly close to the reported for single crystals. info:eu-repo/grantAgreement/ES/DGA/T12 info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2013-46505-C3-1-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.966 2018 MATERIALS SCIENCE, CERAMICS 8 / 28 = 0.286 2018 Q2 T1 0.511 2018 Electrical and Electronic Engineering 2018 Q2 Electronic, Optical and Magnetic Materials 2018 Q2 Mechanics of Materials 2018 Q2 Condensed Matter Physics 2018 Q2 Materials Chemistry 2018 Q2 Ceramics and Composites 2018 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Ozçelik, Bekir Nane, O. Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 Rasekh, Sh. (orcid)0000-0003-3466-9952 Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 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. 40, 1 (2018), 11-15 J. Electroceram. JOURNAL OF ELECTROCERAMICS 1385-3449 619312 http://zaguan.unizar.es/record/168152/files/texto_completo.pdf Postprint 1342478 http://zaguan.unizar.es/record/168152/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:168152 articulos driver 2026-01-28-11:25:10 ARTICLE