Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1485083 | Journal of Non-Crystalline Solids | 2008 | 6 Pages |
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 â 7F2 and 5D0 â 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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
D. Hreniak, P. Psuja, W. StrÄk, J. Hölsä,