126574 20260126150157.0 doi 10.1007/s10854-022-08617-8 sideral 130053 ART-2022-130053 eng Rasekh, S. Variation of mechanical and electrical performances of Bi2Ca2Co1.7Ox ceramics above working conditions 2022 Access copy available to the general public Unrestricted This work explores the effect of exposing the Bi2Ca2Co1.7Ox-textured ceramics at temperatures above working conditions, on mechanical and electrical properties. Microstructural studies have shown a first improvement of microstructure with an important grain growth, followed by the formation of porosity and the appearance of cracks for larger times. These features were reflected on their mechanical and electrical properties. Three point bending tests have revealed an increase of bending strength with the thermal treatment, reaching the maximum at 24 h and decreasing for further treatment time, which is very slight for times larger than 196 h. On the other hand, electrical resistivity is drastically reduced with the thermal treatment when compared to the as-grown samples. Moreover, the samples behavior is modified from semiconducting-like for as-grown samples to metallic-like for the thermally treated ones. Accordingly, Seebeck coefficient is decreased with the thermal treatment, being very similar for all thermally treated samples. As a consequence of the drastic decrease of electrical resistivity, although with lower reduction on the Seebeck coefficient, all thermally treated samples display higher power factor values than the as-grown ones. The highest values at 650 °C (0.29 mW/K2 m) have been obtained in textured samples thermally treated for 48 h, which are comparable to the best values reported in the literature without the use of expensive materials. info:eu-repo/grantAgreement/ES/DGA/T54-20R info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82183-C3-1-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.8 2022 PHYSICS, APPLIED 75 / 160 = 0.469 2022 Q2 T2 ENGINEERING, ELECTRICAL & ELECTRONIC 137 / 274 = 0.5 2022 Q2 T2 PHYSICS, CONDENSED MATTER 34 / 67 = 0.507 2022 Q3 T2 MATERIALS SCIENCE, MULTIDISCIPLINARY 201 / 343 = 0.586 2022 Q3 T2 0.496 2022 Electrical and Electronic Engineering 2022 Q2 Condensed Matter Physics 2022 Q2 Atomic and Molecular Physics, and Optics 2022 Q2 Electronic, Optical and Magnetic Materials 2022 Q2 Biophysics 2022 Q3 Biomaterials 2022 Q3 Bioengineering 2022 Q3 Biomedical Engineering 2022 Q3 4.6 2022 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Ghanbari, M. Natoli, A. Torres, M. A. Universidad de Zaragoza (orcid)0000-0003-3995-5763 Madre, M. A. Universidad de Zaragoza (orcid)0000-0002-0794-3998 Sotelo, A. Universidad de Zaragoza (orcid)0000-0001-7056-0546 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. 33, 22 (2022), 17551-17558 J. mater. sci., Mater. electron. Journal of Materials Science: Materials in Electronics 0957-4522 530438 http://zaguan.unizar.es/record/126574/files/texto_completo.pdf Postprint 1326510 http://zaguan.unizar.es/record/126574/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:126574 articulos driver 2026-01-26-14:59:57 ARTICLE