000150329 001__ 150329
000150329 005__ 20251017144643.0
000150329 0247_ $$2doi$$a10.1111/jace.20372
000150329 0248_ $$2sideral$$a142461
000150329 037__ $$aART-2025-142461
000150329 041__ $$aeng
000150329 100__ $$aAmirkhizi, P.
000150329 245__ $$aEnhancing electrical properties in CaMnO<sub>3</sub>-based ceramics: The impact of single doping with different elements
000150329 260__ $$c2025
000150329 5060_ $$aAccess copy available to the general public$$fUnrestricted
000150329 5203_ $$aThis study explores the effect of single doping with different rare earth elements (Y, La, and Yb) on the structural, morphological and electrical properties of CaMnO3 bulk ceramics, aiming to improve their thermoelectric performance. Ca(1‐x)RxMnO3 (R = Y, La, Yb; x = 0, 0.05, 0.10) samples were synthesized via a solid‐state reaction. XRD analysis confirmed the thermoelectric CaMnO3 phase as the major one, with orthorhombic perovskite structure. Small amounts of secondary phases (CaMn2O4 and Mn2O3) were also detected in some doped samples. The addition of dopants influenced the unit cell parameters, producing a shift to lower 2θ angles, confirming their incorporation into the ceramic structure. SEM micrographs revealed a significant reduction in grain size upon doping. Electrical resistivity measurements showed a metallic behavior for all doped samples. The Y‐doped samples exhibited the highest resistivity values while the Yb‐doped samples showed the lowest values (6.8 mΩ cm for the 0.10 doped one), which are among the lowest found in literature for this compound. The Seebeck coefficient values show minor changes for 0.05 doped samples when they decreased with increasing concentration of dopant. Consequently, the highest values were observed for 0.05‐doped sample (−215 µV/K), independently of the dopant. This value is much higher than the ones typically reported in the literature. The highest value of the power factor was calculated for the 0.05 Yb doped sample, reaching approximately 0.56 mW/K2·m at 800°C. This value is higher than the best presented in the literature for this compound, to the best of our knowledge, and suggests that Yb3+ doping greatly enhances the high‐temperature thermoelectric performance of bulk CaMnO3 ceramics, making it a promising dopant for high‐efficiency thermoelectric materials.
000150329 536__ $$9info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S$$9info:eu-repo/grantAgreement/ES/DGA/T54-23R
000150329 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000150329 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000150329 700__ $$0(orcid)0000-0002-0794-3998$$aMadre, M. A.$$uUniversidad de Zaragoza
000150329 700__ $$0(orcid)0000-0002-1614-1962$$aConstantinescu, G.
000150329 700__ $$0(orcid)0000-0003-3995-5763$$aTorres, M. A.$$uUniversidad de Zaragoza
000150329 700__ $$0(orcid)0000-0001-7056-0546$$aSotelo, A.$$uUniversidad de Zaragoza
000150329 700__ $$aKovalevsky, A. V.
000150329 700__ $$0(orcid)0000-0003-3466-9952$$aRasekh, Sh.$$uUniversidad de Zaragoza
000150329 7102_ $$15002$$2305$$aUniversidad de Zaragoza$$bDpto. Ingeniería Diseño Fabri.$$cÁrea Expresión Gráfica en Ing.
000150329 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000150329 773__ $$g108, 5 (2025), e20372 [9 pp.]$$pJ. Am. Ceram. Soc.$$tJOURNAL OF THE AMERICAN CERAMIC SOCIETY$$x0002-7820
000150329 8564_ $$s869717$$uhttps://zaguan.unizar.es/record/150329/files/texto_completo.pdf$$yPostprint
000150329 8564_ $$s1598092$$uhttps://zaguan.unizar.es/record/150329/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000150329 909CO $$ooai:zaguan.unizar.es:150329$$particulos$$pdriver
000150329 951__ $$a2025-10-17-14:33:00
000150329 980__ $$aARTICLE