32801 20231221135826.0 doi 10.1016/j.jeurceramsoc.2015.09.034 sideral 92299 ART-2016-92299 eng Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing 2016 Access copy available to the general public Unrestricted Bi2-xPbxBa2Co2Oy (x=0.0, 0.2, 0.4, and 0.6) misfit compounds were grown by the laser floating zone technique. Microstructural analysis has shown the formation of thermoelectric grains together with high amount of secondary phases. Thermoelectric grains orientation is increased until 0.4Pb, while further substitution drastically destroys the preferential grain orientation. Electrical resistivity is very low compared with the values obtained in sintered materials, spectacularly increasing power factor. Moreover, the performance of these materials was further improved subjecting the as-grown samples to a postannealing step due to the rise of thermoelectric phase content. These microstructural modifications led to a high decrease of electrical resistivity, improving power factor in around a factor two at room temperature, compared with the as-grown samples. Moreover, the low thermal conductivity of the textured annealed samples leads to a maximum estimated ZT value of 0.53 for the 0.2 Pb-doped samples, much higher than the reported in literature. 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 by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.411 2016 MATERIALS SCIENCE, CHARACTERIZATION & TESTING 1 / 26 = 0.038 2016 Q1 T1 MATERIALS SCIENCE, CERAMICS 1 / 26 = 0.038 2016 Q1 T1 1.141 2016 Materials Chemistry 2016 Q1 Ceramics and Composites 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion Costa, F.M. Ferreira, N.M. Costa, S.I.R. Rasekh, S. (orcid)0000-0003-3466-9952 Torres, M.A. Diez, J.C. Amaral, V.S. Amaral, J.S. Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 36, 1 (2016), 67-74 J. Eur. Ceram. Soc. Journal of the European Ceramic Society 0955-2219 1318666 http://zaguan.unizar.es/record/32801/files/texto_completo.pdf Preprint 80100 http://zaguan.unizar.es/record/32801/files/texto_completo.jpg?subformat=icon icon Preprint oai:zaguan.unizar.es:32801 articulos driver 2023-12-21-13:40:39 ARTICLE