Spectral evolution of Eu3+ doped Y3NbO7 niobate induced by temperature
Language
en
Article de revue
This item was published in
Journal of Solid State Chemistry. 2016-03, vol. 235, p. 169-174
Elsevier
English Abstract
A Eu3+ doped Y3NbO7 niobate powder was synthetized using a polymerizable complex route. It gave rise to nanometric particles that crystallized in the fluorine structure, corresponding to the Y3NbO7 phase. The thermal ...Read more >
A Eu3+ doped Y3NbO7 niobate powder was synthetized using a polymerizable complex route. It gave rise to nanometric particles that crystallized in the fluorine structure, corresponding to the Y3NbO7 phase. The thermal evolution of this powder was followed up to 1600 °C, using X-ray diffraction and optical characterizations. The fluorine structure was maintained in the whole temperature range. However, spectral evolution of the samples calcined above 900 °C showed a more complex situation. Emission spectra of powders heat treated at different temperatures showed an evolution of the emission lines that can be attributed first to a better crystallization of the niobate phase and second to its partial decomposition in favor of the formation of YNbO4 and Y2O3. Although the Y3NbO7 phase appeared stable up to 1650 °C, from X-ray diffraction analysis, spectral analysis showed that the local environment of the doping element is modified from 1100 °C.Read less <
English Keywords
Luminescence
Solid solution
ANR Project
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
Origin
Hal imported