masterThesis
Propriedade fotoluminescente da ZrO2: Tb+3, Eu+3, Tm+3 obtida pelo método de polimerização de complexos
Fecha
2013-12-16Registro en:
LOVISA, Laura Ximena. Propriedade fotoluminescente da ZrO2: Tb+3, Eu+3, Tm+3 obtida pelo método de polimerização de complexos. 2013. 102 f. Dissertação (Mestrado em Processamento de Materiais a partir do Pó; Polímeros e Compósitos; Processamento de Materiais a part) - Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Lovisa, Laura Ximena
Resumen
Recent studies are investigating a new class of inorganic materials which arise as a
promising option for high performance applications in the field of photoluminescence.
Highlight for rare earth (TR
+3
) doped, which have a high luminous efficiency, long
decay time and being able to emit radiation in the visible range, specific to each
element. In this study, we synthesized ZrO2: Tb
+3
, Eu
+3
, Tm
+3
nanoparticles complex
polymerization method (CPM). We investigated the influences caused by the heat
treatment temperature and the content of dopants in zirconia photoluminescent
behavior. The particles were calcined at temperature of 400, 500 and 600 ° C for two
hours and ranged in concentration of dopants 1, 2, 4 and 8 mol% TR
+3
. The samples
were characterized by thermal analysis, X-ray diffraction, photoluminescence of
measurements and uv-visible of spectroscopies. The results of X-ray diffraction
confirmed the formation of the tetragonal and cubic phases in accordance with the
content of dopants. The photoluminescence spectra show emission in the region
corresponding simultaneous to blue (450 nm), green (550 nm) and red (615 nm).
According to the results, ZrO2 particles co-doped with rare earth ions is a promising
material white emission with a potential application in the field of photoluminescence