145196 20260217205601.0 doi 10.1016/j.ceramint.2024.09.030 sideral 139968 ART-2024-139968 eng Amirkhizi, P. Fabrication and thermoelectric properties of multilayer textured Sr-doped Ca3Co4O9/Ag laminar composites 2024 Access copy available to the general public Unrestricted This work presents a comparative analysis of pure and Ag-intercalated Ca3Co4O9 multilayer thermoelectric materials prepared through the hot-uniaxial pressing technique. Samples were prepared by attrition milling and hot-pressed at 900 °C and 55 MPa for 1 h. They were mirror polished, and some of them were stacked with and without intermediate Ag foil and hot-pressed again at 900 °C and 52 MPa for 1 h. Out-of-plane XRD showed that samples are nearly single-phase, and the grains are well oriented with their ab-plane perpendicular to the pressure direction. Microstructural studies confirmed perfect welding in the multilayer samples accompanied by the formation of a very thin layer containing larger grains and notable Ag diffusion close to the Ca3Co4O9/Ag interface. Three-point bending stresses have been increased in Ag-containing samples, while microhardness has been raised in all samples hot-pressed twice. Thermoelectric measurements showed a decrease of thermal gradient along the Ag-containing sample, together with a drastic decrease of electrical resistivity when compared to the Ag-free ones. However, the Ag-layers have promoted a drastic decrease in the Seebeck coefficient, reflected in a notable reduction of the power factor of Ca3Co4O9/Ag multilayer composites. Nevertheless, these results show that it is possible to use these materials to reduce Joule heating and increasing the compatibility with the welding compounds when building thermoelectric modules. Moreover, they open a new research line searching for larger S compounds to be intercalated with Ag foils. info:eu-repo/grantAgreement/ES/DGA/T54-23R info:eu-repo/grantAgreement/ES/UZ/UZ2022-IAR-09 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 5.6 2024 MATERIALS SCIENCE, CERAMICS 3 / 34 = 0.088 2024 Q1 T1 1.034 2024 Ceramics and Composites 2024 Q1 Electronic, Optical and Magnetic Materials 2024 Q1 Surfaces, Coatings and Films 2024 Q1 Process Chemistry and Technology 2024 Q1 Materials Chemistry 2024 Q1 9.1 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Wang, H.C. Li, Z.H. Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 Hedayati, M. Kovalevsky, A.V. Rasekh, Sh. (orcid)0000-0003-3466-9952 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. 50, 22 part. B (2024), 46784-46790 Ceram. int. Ceramics International 0272-8842 3648934 http://zaguan.unizar.es/record/145196/files/texto_completo.pdf Versión publicada 2529407 http://zaguan.unizar.es/record/145196/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:145196 articulos driver 2026-02-17-20:44:46 ARTICLE