YAG:Ce3+ nanostructured particles obtained via spray pyrolysis of polymeric precursor solution
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Cerium-doped yttrium aluminum garnet (YAG:Ce3+) powder phosphor is synthesized via spray pyrolysis of polymeric precursor solution obtained by dissolving the corresponding nitrates in ethylenediaminetetraacetic acid (EDTA). Ultrasonically generated aerosol droplets are decomposed at 600 degrees C in argon atmosphere. Following the initial attempt in providing pure YAG:Ce3+, phase generation the particles were additionally thermally treated for 3 h in air at 1000 and 1100 degrees C. The powder morphology is followed with scanning electron microscopy (SEM), while inner particle structure is analysed by analytical and high-resolution transmission electron microscopy (TEM). Phase identification is performed by X-ray powder diffraction (XRPD) based on which a structural refinement through Rietveld method was done. The spherical submicronic particles have grained sub-structure comprising clustered garnet monocrystals sized below 100 nm. The YAG:Ce3+ emission shows wide peak in the range 470-...600 nm with the maximum near 520 nm. (C) 2009 Elsevier Ltd. All rights reserved.
Keywords:X-ray methods / Spray pyrolysis / Polymeric precursor / Garnet
Source:Journal of the European Ceramic Society, 2010, 30, 2, 577-582
- 11th Electroceramics Conference 2008, Sep 01-03, 2008, Univ Manchester, Manchester, England