75417 20240104111806.0 doi 10.1080/17436753.2017.1386409 sideral 104544 ART-2018-104544 eng Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Improving bulk Ca3Co4O9 thermoelectric materials through Zr doping 2018 Access copy available to the general public Unrestricted Ca3Co4-xZrxOy polycrystalline ceramics with small Zr substitution have been prepared through the classical solid-state method. X-ray diffraction data have shown that all samples are composed only of Ca3Co4O9 and Ca3Co2O6 phases. Moreover, by increasing Zr substitution up to 0.07, Ca3Co2O6 phase content is decreased. Density measurements have revealed that all samples are very similar, with values around 74% of the theoretical density. Electrical resistivity is decreased in Zr-doped samples, with respect to the pure samples, while Seebeck coefficient is unchanged. Both factors lead to power factor values around 0.33 mW K-2 m-1 at 800°C in 0.07 Zr-doped samples, which are about 65% higher than those obtained for the undoped samples. info:eu-repo/grantAgreement/ES/DGA/T12 info:eu-repo/grantAgreement/ES/DGA/T87 info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46505-C3-1-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.429 2018 MATERIALS SCIENCE, CERAMICS 11 / 28 = 0.393 2018 Q2 T2 0.367 2018 Industrial and Manufacturing Engineering 2018 Q2 Ceramics and Composites 2018 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Rasekh, S. (orcid)0000-0003-3466-9952 Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Diez, J.C. 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. 117, 3 (2018), 142-146 Adv. Appl. Ceram. Advances in Applied Ceramics 1743-6753 429021 http://zaguan.unizar.es/record/75417/files/texto_completo.pdf Postprint 60028 http://zaguan.unizar.es/record/75417/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:75417 articulos driver 2024-01-04-11:00:34 ARTICLE