Luminóforo azul preparado a partir do método de combustão
Article Sidebar
Main Article Content
Abstract
Neste trabalho, o luminóforo azul Sr2CeO4 é preparado a partir de um precursor multicomponente na forma de pó via método de combustão, variando-se o combustível, resultando num pó de partículas finas. A utilização de ácido cítrico ou glicina como combustível leva à formação de composições diferentes, que após tratamento térmico a 950ºC, convertem-se em um material com predominância da fase Sr2CeO4. A emissão de luz branca azulada é somente observada nas amostras após tratamento térmico, e seus espectros de excitação e de emissão são idênticos e característicos da fase luminescente Sr2CeO4. Portanto o método de combustão é apropriado para preparação de luminóforos azuis.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
The corresponding author transfers the copyright of the submitted manuscript and all its versions to Eclet. Quim., after having the consent of all authors, which ceases if the manuscript is rejected or withdrawn during the review process.
When a published manuscript in EQJ is also published in other journal, it will be immediately withdrawn from EQ and the authors informed of the Editor decision.
Self-archive to institutional, thematic repositories or personal webpage is permitted just after publication. The articles published by Eclet. Quim. are licensed under the Creative Commons Attribution 4.0 International License.
References
DANIELSON, E.; DEVENNEY, M.; GIAQUINTA, D.; M.GOLDEN, J. H.; HAUSHALTER, R. C.; MCFARLAND, E. W.; POOJARY, D. M.; REAVES, C. M.; WEINBERG, W. H.; WU, X. D. X-ray powder structure of Sr2CeO4: a new luminescent material discovered by combinatorial chemistry. J. Mol. Struct., v.470, p.229-235, 1998.
DANIELSON, E.; DEVENNEY, M.; GIAQUINTA, D. M.; GOLDEN, J. H.; HAUSHALTER, R. C.; MCFARLAND, E. W.; POOJARY, D. M.; REAVES, C. M.; WEINBERG, W.H.; WU, X. D. A Rare-earth phosphor containing one-dimensional chains identified through combinatorial methods. Science, v.279, p.837-839, 1998.
DIONYSIOU D.; QI X.; LIN Y.S.; MENG G.; PENG D. "Preparation and characterization of proton conducting terbium doped strontium cerate membranes". J. Membrane Sci., v.154, p.143-153, 1999.
JIANG, Y.D.; ZHANG, F. L.; SUMMERS, C. J.; WANG, Z. L. Synthesis and properties of Sr2CeO4 blue emission powder phosphor for field emission displays. Appl. Phys. Letters, v.74, p.1677-1679, 1999.
JÜSTEL, T.; NIKOL, H.; RONDA, C. New developments in the field of luminescent materials for lighting and displays. Angew. Chem. Int. Ed., v.37, p.3084-3103, 1998.
LESKELÄ, M.; LI, W. M.; SAARI, J.; HAASE, A. Photoluminescence of Eu2+ doped calcium carbonate and oxalate. In: INTERNATIONAL CONFERENCE ON F-ELEMENTS , 4, 2000, Madrid: Abstract Book CO9.
LOPEZ, O.A.; MCKITTRICK, J. SHEA, L. E. Fluorescence properties of polycrystalline Tm3+-activated Y3Al5O12 and Tm3+-Li+ co-activated Y3Al5O12 in the visible and near IR ranges. J. Lumin., v.71, p.1-11, 1997.
PARK, C.; KIM, C.; PYUN, C.; CHOY, J. Luminescence of Sr2CeO4. J. Lumin., v.87-89, p.1062-1064, 2000.
POWDER DIFFRACTION FILE PDF-2 database sets 1-44. Pesylvannia Joint Committee on Powder Diffraction Standards – International Center for Diffraction Data . c 1988, PDG number 43-1014. (CD-ROM).
SERRA, O. A.; SEVERINO, V. P.; CALEFI, P. S.; CICILLINI, S. A.The blue phosphor Sr2CeO4 synthesized by the pechini's method. J. Alloys. Compd., v.323, p.667-669, 2001.
SUN, L. D.; YAO, J.; LIU, C. G.; LIAO, C.S.; YAN, C. H. Rare earth activated nanosized oxide phosphors: synthesis and optical properties. J. Lumin., v.89, p.447-450, 2000.
TAO,Y.; ZHAO, G.; ZHANG, W.; XIA, S. Combustion synthesis and photoluminescence of nanocrystalline Y2O3:Eu phosphors. Mater. Res. Bull., v.32 p.501-506,1997.
ZYCH, E.; DEREN, P. J.; STREK, W.; MEIJERINK, A.; MIELCAREK, W.; DOMAGALA, K. Preparation, X-ray analysis and spectroscopic investigation of nanostructured Lu2O3 : Tb. J. Alloys Comp., v.323, p.8-12, 2001