131371 20240208115248.0 doi 10.1016/j.materresbull.2011.08.011 sideral 74975 ART-2011-74975 eng Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 Improved thermoelectric properties in directionally grown Bi2Sr2Co1.8Oy ceramics by Pb for Bi substitution 2011 Thermoelectric performances of misfit cobaltites can be controlled by grain orientation and/or by cation substitution. Both processes have been simultaneously performed by directional solidification at 0.03 m/h, using the laser floating zone technique, of Bi2-xPbxSr 2Co1.8Oy (with x = 0.0, 0.2, 0.4 and 0.6). The microstructure has shown two different main phases as a function of Pb content, a Co-poor phase for low Pb content (0.0 and 0.2) and a Co-rich one for higher Pb substitution. These microstructural changes are reflected on the thermoelectric properties leading to an important decrease on the resistivity and increase of thermopower for samples with 0.4Pb substitution. Both improvements lead to power factor values higher than usual in textured misfit cobaltites. Access copy available to the general public Unrestricted info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.105 2011 MATERIALS SCIENCE, MULTIDISCIPLINARY 55 / 229 = 0.24 2011 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Rasekh, Sh. (orcid)0000-0003-3466-9952 Guilmeau, E. Madre, M. A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Torres, M. A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Marinel, S. 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. 46 (2011), 2537-2542 Mater. res. bull. Materials Research Bulletin 0025-5408 756542 http://zaguan.unizar.es/record/131371/files/texto_completo.pdf Postprint 1213632 http://zaguan.unizar.es/record/131371/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:131371 articulos driver 2024-02-08-10:06:43 ARTICLE