Article ID Journal Published Year Pages File Type
1485083 Journal of Non-Crystalline Solids 2008 6 Pages PDF
Abstract
Silica submicron spherical particles coated with an yttrium aluminum garnet (Y3Al5O12, YAG) layer doped with Eu3+ were prepared by the sol-gel method. The structure and morphology of samples determined by the X-ray powder diffraction measurements and transmission electron microscope images, respectively, indicated that well-crystallized garnet nanocrystallites were formed with successive coating cycles. Similar trends were deduced from the evolution of the luminescence spectra. The ratio of integrated intensities of the 5D0 → 7F2 and 5D0 → 7F1 transitions was used to analyze the structural variations in the surroundings of the Eu3+ ion. The effect of coating was analyzed by comparing the luminescence properties of the Y3Al5O12:Eu3+ nanocrystalline powders and composite Y3Al5O12:Eu3+/SiO2 materials.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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