Electrical and microstructural characterization of two-step sintered ceria-based electrolytes
authors Lapa, CM; de Souza, DPF; Figueiredo, FML; Marques, FMB
nationality International
journal JOURNAL OF POWER SOURCES
author keywords Solid electrolytes; Solid oxide fuel cells; Ceria; Sintering; Microstructure
keywords GADOLINIA-DOPED CERIA; GALLIA ADDITIONS; CERAMICS; BEHAVIOR; OXIDE
abstract Gadolinium-doped ceria-based materials with and without Ga-additions were prepared following several firing schedules including one peak sintering temperature (up to 1300 degrees C) with or without subsequent dwell at lower temperature (at 1150 degrees C). Sintered disks with subalicrometric grain size and densifications in the order of 92% or higher, were obtained in this manner, with the final result depending slightly on the sintering profile and presence of Ga as dopant. All materials were characterized by scanning electron microscopy, X-ray diffraction and impedance spectroscopy in air, in the temperature range 200-800 degrees C. The grain boundary arcs were found slightly dependent on grain size and porosity but significantly on Ga-doping, due to the likely presence of large concentrations of Ga along the grain boundary region. (c) 2008 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0378-7753
year published 2009
volume 187
issue 1
beginning page 204
ending page 208
digital object identifier (doi) 10.1016/j.jpowsour.2008.10.071
web of science category Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary
subject category Chemistry; Electrochemistry; Energy & Fuels; Materials Science
unique article identifier WOS:000263306300025
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journal analysis (jcr 2017):
journal impact factor 6.945
5 year journal impact factor 6.686
category normalized journal impact factor percentile 88.302
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