76968 20240104111810.0 doi 10.3390/ma11122503 sideral 109855 ART-2018-109855 eng Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 Influence of Ag on the properties of Ca0.9Yb0.1MnO3 sintered ceramics 2018 Access copy available to the general public Unrestricted In this study, Ca0.9Yb0.1MnO3 + x wt.% Ag (with x = 0, 1, 3, 5, and 10) thermoelectric materials were prepared via the classical ceramic method. In spite of the very high sintering temperature (1300 °C), no significant Ag losses were observed following this process. Moreover, Ag addition enhanced cation mobility during sintering due to the formation of a liquid phase. Microstructurally, it was found that Ag decreases porosity; this was confirmed by density measurements. Ag was also found to promote the formation of a Ca2Mn2O5 secondary phase. Despite the presence of this secondary phase, samples with Ag displayed lower electrical resistivity than Ag-free ones, without a drastic decrease in the absolute Seebeck coefficient. The highest thermoelectric performances, which were determined by power factor, were obtained in 1 wt.% Ag samples. These maximum values are slightly higher than the best of those reported in the literature for sintered materials with similar compositions, with the additional advantage of their being obtained using a much shorter sintering procedure. info:eu-repo/grantAgreement/ES/DGA/T54-17R info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82183-C3-1-R info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.972 2018 MATERIALS SCIENCE, MULTIDISCIPLINARY 102 / 293 = 0.348 2018 Q2 T2 0.686 2018 Materials Science (miscellaneous) 2018 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Diez, J.C. Universidad de Zaragoza (orcid)0000-0001-9995-6368 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. 11, 12 (2018), 2503 [10 pp] Materials (Basel) Materials 1996-1944 2794620 http://zaguan.unizar.es/record/76968/files/texto_completo.pdf Versión publicada 111624 http://zaguan.unizar.es/record/76968/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:76968 articulos driver 2024-01-04-11:02:10 ARTICLE