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Título: | Low-temperature sintering and enhanced stability of fluorine-modified BaZr0.8Y0.2O3-δ synthesised by a sol-gel alkoxide route |
Autor: | Triviño Peláez, Ángel; Mosa Ruiz, Jadra CSIC ORCID; Pérez-Coll, Domingo CSIC ORCID ; Aparicio, Mario CSIC ORCID ; Mather, Glenn C. CSIC ORCID | Palabras clave: | Barium zirconate BZY Proton-conducting perovskites Protonic ceramic cells Sol-gel |
Fecha de publicación: | 1-ene-2023 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 43 (2023) 99–108 | Resumen: | Sol-gel synthesis using alkoxides is employed to obtain fluorine-modified BaZr0.8Y0.2O3-δ nanopowders with Ba excess at 750 °C. Possible effects of F loss at high temperature were limited on densifying at the low temperature of 1200 °C for 4 h on addition of ZnO as sintering agent. The presence of F in sintered samples was confirmed by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry. XPS and Raman spectroscopy indicated that F doping of BZY inhibits carbonate formation. Conductivity measurements for prolonged periods in wet H2-containing and CO2-containing atmospheres at 500 °C also demonstrated chemical stability. The temperature dependence of the electrical conductivity of sintered samples in wet and dry N2 and O2 indicates that the grain-boundary dominates the electrical behaviour to 500 °C, above which the bulk process dominates. Ionic conduction is prevalent at low temperature, with a transition to a mixed ionic-electronic conducting behaviour at 450 °C. | Versión del editor: | https://doi.org/10.1016/j.jeurceramsoc.2022.09.042 | URI: | http://hdl.handle.net/10261/350349 | DOI: | 10.1016/j.jeurceramsoc.2022.09.042 | ISSN: | 09552219 |
Aparece en las colecciones: | (ICV) Artículos |
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1-s2.0-S0955221922007385-main.pdf | Artículo principal | 3,99 MB | Adobe PDF | Visualizar/Abrir |
1-s2.0-S0955221922007385-mmc1.docx | Supplementary data | 137,06 kB | Microsoft Word XML | Visualizar/Abrir |
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