Preparation and microstructure characterization of novel La2−xSr2−xNb2O10−x oxides

The aim of the present work is to report the study of samples with the La2−xSr2−xNb2O10−x stoichiometry obtained under different synthesis conditions. The materials were characterized and studied by means of Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM)...

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Bibliographic Details
Published inMaterials letters Vol. 65; no. 12; pp. 1846 - 1849
Main Authors Rangel, R., Morales, F., García, R., Galván, D.H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 30.06.2011
Subjects
HRTEM
Lanthanum
Magnetism
microstructure
Niobium
oxides
Perovskites
scanning electron microscopy
stoichiometry
Strontium
temperature
transmission electron microscopy
X-ray diffraction
Strontium
Perovskites
Magnetism
Lanthanum
Niobium
HRTEM
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Summary:The aim of the present work is to report the study of samples with the La2−xSr2−xNb2O10−x stoichiometry obtained under different synthesis conditions. The materials were characterized and studied by means of Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM), X-ray diffraction analysis (XRD), and AC Susceptibility. A preliminary identification of the main peaks appearing in the diffraction patterns is shown for the synthesized phases. The La2−xSr2−xNb2O10−x compound undergoes a structural change as a function sintering temperature, with three kinds of the stabilized structure, one is from 1173<T≤1373K, another from 1423<T≤1573K and the last one from 1623<T≤1723K.
Bibliography:http://dx.doi.org/10.1016/j.matlet.2011.03.052
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2011.03.052