doi:10.1016/j.jallcom.2025.178628engAmirkhizi, P.Hedayati, M.Madre, M.A.Dura, O.J.Torres, M.A.Sotelo, A.Kovalevsky, A.V.Rasekh, Sh.Fabrication and testing of ceramic thermoelectric multi-leg module for high-temperature energy conversionART-2025-142554This 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.2025http://zaguan.unizar.es/record/15038710.1016/j.jallcom.2025.178628http://zaguan.unizar.es/record/150387oai:zaguan.unizar.es:150387info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-Sinfo:eu-repo/grantAgreement/ES/DGA/T54-23RJOURNAL OF ALLOYS AND COMPOUNDS 1013 (2025), 178628 [9 pp.]byhttps://creativecommons.org/licenses/by/4.0/deed.esinfo:eu-repo/semantics/openAccess