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Título

Sol-Gel Synthesis and Simultaneous Oxidation of Ln2Ba2Cu2Ti2O11 (Ln=La, Nd, Eu, Tb)

AutorPalacín, M. R.; Casañ Pastor, Nieves; Gómez-Romero, P. ; Gómez-Romero, P.
Palabras claveCopper–titanium oxides
Layered cuprates
Sol–gel
Oxidation
Soft chemistry
Fecha de publicaciónjun-1998
EditorElsevier
CitaciónJournal of Solid State Chemistry 138(1): 141-148 (1998)
ResumenThe synthesis of several substituted and unsubstituted derivatives of the series of layered perovskitesLn2Ba2Cu2Ti2O11by a sol–gel method is reported. Reduced synthesis temperatures were attained for La, Nd (750°C), and Eu (900°C) derivatives, whereas Tb derivatives could not be obtained by this method. The products were characterized by small particle sizes of 30–100 nm (compared to 800 nm for samples prepared by the classical ceramic method). Furthermore,in situoxidation of the samples took place leading to oxidized products, such as La2Ba2Cu2.15Ti2O11, which earlier could have been obtained only by high oxygen pressure (5 kbar) annealing.
Versión del editorhttp://dx.doi.org/10.1006/jssc.1998.7765
URIhttp://hdl.handle.net/10261/15575
DOI10.1006/jssc.1998.7765
ISSN0022-4596
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