150387 20260128112906.0 doi 10.1016/j.jallcom.2025.178628 sideral 142554 ART-2025-142554 eng Amirkhizi, P. Fabrication and testing of ceramic thermoelectric multi-leg module for high-temperature energy conversion 2025 Access copy available to the general public Unrestricted This study investigates the fabrication and performance of ceramic-based thermoelectric modules for high-temperature energy conversion, based on Ca2.93Sr0.07Co4O9 and Ca0.91Y0.03La0.03Yb0.03MnO3 p- and n-type materials. The p-type materials were prepared through attrition milling and classical sintering, while ball milling and hot uniaxial pressing were used for the n-type legs. The power factor reached 0.62 mW/(K2m) for the p-type and 0.33 mW/(K2m) for the n-type materials at 800 °C, being comparable to some of the best-reported values in literature. The lower thermal conductivity of n-type material (1.24 W/K/m) compared to the p-type material (1.56 W/K/m) resulted in similar ZT values for n-type (0.29) and p-type (0.43). The thermal expansion behaviour of the materials was also evaluated, demonstrating good thermal compatibility between the p- and n-type legs. The module's performance was tested at hot-side temperatures up to 900 °C, yielding a power density of 34 W/m2. Moreover, the module demonstrated an energy conversion efficiency of 0.8 % (actual) and 6 % (theoretical), thereby underscoring the practical potential of these materials. Additionally, the module exhibited excellent long-term thermal stability, maintaining its performance after 2000 h of exposure at 900 °C and after undergoing 100 thermal cycles, demonstrating its suitability for high-temperature energy recovery applications. info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S info:eu-repo/grantAgreement/ES/DGA/T54-23R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hedayati, M. Madre, M.A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Dura, O.J. Torres, M.A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 Kovalevsky, A.V. Rasekh, Sh. Universidad de Zaragoza (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. 1013 (2025), 178628 [9 pp.] J. alloys compd. JOURNAL OF ALLOYS AND COMPOUNDS 0925-8388 5281879 http://zaguan.unizar.es/record/150387/files/texto_completo.pdf Versión publicada 2570757 http://zaguan.unizar.es/record/150387/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:150387 articulos driver 2026-01-28-11:25:07 ARTICLE