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Meeting Materials Science & Technology 2019
Symposium Late News Poster Session
Presentation Title P2-106: Substitutional Solid Solutions of Rare Earth Doped-Ceria Elaborated by Chemical Co-precipitation
Author(s) Karla Maria Rangel-Arreola, Ena Athenea Aguilar-Reyes, Carlos Alberto León-Patiño
On-Site Speaker (Planned) Karla Maria Rangel-Arreola
Abstract Scope Ceria doped with aliovalent elements of rare earth group is usually used as semiconductors, catalysts, SOFC electrolytes, etc. In the present investigation, Ce0.85-xGd0.15MxO2-δ (x = 0, 0.03, 0.05 and M = Sm or La) powders elaborated by chemical co-precipitation synthesis at room temperature were studied. This chemical preparation promotes obtaining nanometric-size powders with semispherical morphology observed by TEM (17 ± 1.4 nm) and the decrease of particle size as the quantity of doped elements increased. It was demonstrated by XRD, Raman spectroscopy and XPS the correct doped of ceria by a left shift characteristic of the random atomic substitution of Ce4+ by the doping elements of various ionic radii. Also XPS analysis showed that Ce3+ content decreased in doped ceria with the addition of cations Gd3+, Sm3+ and La3+. It will expect an increase in the performance of this kind of material when using as SOFC electrolytes.
Proceedings Inclusion? Undecided


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