95407 20240104111815.0 doi 10.1016/j.bsecv.2020.03.006 sideral 118819 ART-2021-118819 eng Amaveda, H. Universidad de Zaragoza (orcid)0000-0003-2212-447X Tuning Ca3Co4O9 thermal and transport properties by TiC nanoparticles addition 2021 Access copy available to the general public Unrestricted Ca3Co4O9 + xwt.% TiC (x = 0, 0.25, 0.5, 0.75, and 1.0) polycrystalline thermoelectric ceramics have been prepared through the classical ceramic route. XRD characterization has demonstrated that all samples are mainly composed by the Ca3Co4O9 phase, while microstructural observation has shown that no reaction between both components has been produced. Moreover, TiC particles are well distributed for small additions, and start to agglomerate from 0.75 wt.% content. Density measurements showed that nearly no changes have been produced by TiC addition and nearly the whole porosity appears as open one. Furthermore, electrical resistivity decreases up to 0.75 wt.% addition, increasing for higher content. On the other hand, Seebeck coefficient has been maintained unchanged in all samples. In spite of an irregular behaviour of thermal conductivity with temperature, it tends to decrease when the temperature is raised, displaying the lowest values for the 0.25 wt.% samples. These data led to an increase of about 40% in ZT values at 800 °C for samples with 0.25 wt.% addition, when compared with the pure ones. Finally, linear thermal expansion coefficient is decreased when TiC content is increased, which can be exploited to fit the thermal expansion coefficients of all the components used to build a power generation thermoelectric module. info:eu-repo/grantAgreement/ES/DGA-FEDER/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/ 3.483 2021 MATERIALS SCIENCE, CERAMICS 6 / 29 = 0.207 2021 Q1 T1 0.444 2021 Industrial and Manufacturing Engineering 2021 Q2 Ceramics and Composites 2021 Q2 4.3 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Dura, O.J. Mora, M. Universidad de Zaragoza (orcid)0000-0003-4747-7327 Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Guelou, G. Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Marinel, S. 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. 60, 3 (2021), 138-146 Bol. Soc. Esp. Ceram. Vidr. Boletin de la Sociedad Espanola de Ceramica y Vidrio 0366-3175 2875453 http://zaguan.unizar.es/record/95407/files/texto_completo.pdf Versión publicada 111920 http://zaguan.unizar.es/record/95407/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:95407 articulos driver 2024-01-04-11:04:43 ARTICLE