authors |
Nassar, EJ; Avila, LR; Pereira, PFS; de Lima, OJ; Rocha, LA; Mello, C; Ciuffi, KJ; Carlos, LD |
nationality |
International |
journal |
QUIMICA NOVA |
author keywords |
YAG; EuIII; sol-gel |
keywords |
SOL-GEL METHOD; SPECTRA; HYBRIDS; MATRIX; ROUTE |
abstract |
Eu(Ill)-DOPED ALUMINIUM YTTRIUM OXIDE. In this work, we report the synthesis and the photoluminescence features of Eu(Ill)-doped yttriurn-aluminium oxide obtained by non-hydrolytic sol-gel routes. After heating the powders above 600 degrees C the XRD patterns show the presence of the Y4Al2O9 (YAM) and Y3Al5O12 (YAG) phases. At 800 and at 1500 degrees C the PL spectra display the Eu(III) lines characteristic of the YAM monoclinic phase. The D-5(0)->F-7(2) transition is favored relatively to the D-5(0)->F-7(1) lines. However, at 1100 degrees C the cubic YAG is the preferential phase and the D-5(0)->F-7(1) transition dominates the spectrum. The Eu(III) ions lie in a centrosymmetrical site. The different solvents used in the sol-gel synthesis also change the relative proportion between these two phases. This is monitored analyzing the modifications in the relative intensity between the D-5(0)->F-7(2) and the D-5(0)->F-7(1) transitions. |
publisher |
SOC BRASILEIRA QUIMICA |
issn |
0100-4042 |
year published |
2005 |
volume |
28 |
issue |
2 |
beginning page |
238 |
ending page |
243 |
digital object identifier (doi) |
10.1590/S0100-40422005000200014 |
web of science category |
Chemistry, Multidisciplinary |
subject category |
Chemistry |
unique article identifier |
WOS:000228184500014
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
0.668 |
5 year journal impact factor |
0.849 |
category normalized journal impact factor percentile |
13.842 |
dimensions (citation analysis):
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altmetrics (social interaction):
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