000150807 001__ 150807
000150807 005__ 20251017144653.0
000150807 0247_ $$2doi$$a10.1016/j.solidstatesciences.2024.107772
000150807 0248_ $$2sideral$$a142728
000150807 037__ $$aART-2025-142728
000150807 041__ $$aeng
000150807 100__ $$aÖzkurt, Pinar
000150807 245__ $$aEnhanced thermoelectric properties in Bi2Sr2-xBaxCo2Oy via doping and texturing for integration in more efficient thermoelectric generators
000150807 260__ $$c2025
000150807 5060_ $$aAccess copy available to the general public$$fUnrestricted
000150807 5203_ $$aBi2Sr2-xBaxCo2Oy (0 ≤ x ≤ 0.15) thermoelectric samples have been sintered, and textured through the laser floating zone process using a Nd:YAG laser. Powder XRD studies showed that the thermoelectric phase is the major one in all cases, with higher amount of secondary phases in the textured ones due to their incongruent melting. Microstructural characterization revealed a drastic microstructural modification in the textured samples, when compared to the sintered ones, producing much larger and well oriented grains along the growth direction. These characteristics led to lower electrical resistivity in textured samples, reaching the minimum at 650 °C (14.8 mΩ cm) in 0.125Ba-doped samples, which is lower than those typically reported in this system. On the other hand, no significant variation in Seebeck coefficient has been found between the samples. This behaviour is associated to the isovalent doping which does not modify the charge carrier concentration in the material, and the highest values at 650 °C (166 μV/K) are in the order of the reported in the literature. As a consequence, power factor values are mainly driven by the electrical resistivity values, leading to the highest values at 650 °C in 0.125Ba-doped textured samples (0.19 mW/K2m) due to their lowest resistivity. These values are higher than the reported for textured materials and in the order of the best reported for this compound in bulk form. All these properties, together with the possibility of the direct integration of these compounds in thermoelectric modules, make them very attractive for practical applications ensuring access to affordable, reliable, and sustainable energy for all.
000150807 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T54-23R
000150807 540__ $$9info:eu-repo/semantics/embargoedAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000150807 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000150807 700__ $$0(orcid)0000-0002-0794-3998$$aMadre, M.A.$$uUniversidad de Zaragoza
000150807 700__ $$aÖzkurt, Berdan
000150807 700__ $$aTorres, M.A.
000150807 700__ $$aSotelo, A.
000150807 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000150807 773__ $$g159 (2025), 107772 [7 pp.]$$pSolid state sci.$$tSOLID STATE SCIENCES$$x1293-2558
000150807 8564_ $$s1874010$$uhttps://zaguan.unizar.es/record/150807/files/texto_completo.pdf$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2026-11-27
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000150807 909CO $$ooai:zaguan.unizar.es:150807$$particulos$$pdriver
000150807 951__ $$a2025-10-17-14:37:16
000150807 980__ $$aARTICLE