کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1474594 | 991092 | 2012 | 7 صفحه PDF | دانلود رایگان |
A laser melting method has been developed for the synthesis of highly luminescent, long-lasting SrAl2O4:Eu2+, Dy3+ phosphors. The high temperature achieved in high-power density CO2 laser irradiation of mixtures of SrCO3, Al2O3, Eu2O3, and Dy2O3 enabled the one-step, fast synthesis of these phosphors in air at atmospheric pressure. X-ray diffraction, Raman spectroscopy, and scanning electron microscopy characterization studies reveal that the produced materials consist of monoclinic SrAl2O4 grains extensively surrounded by rare-earth ion-enriched grain boundaries. The photoluminescence properties of laser-produced SrAl2O4:Eu2+, Dy3+ materials are discussed. The results reported here suggest that this laser melting method is a promising route for the synthesis of ceramic phosphors. It is presented as an alternative to the conventional sol–gel and solid-state methods, which require the use of high-temperature furnaces, flux additives, and reducing atmospheres.
Journal: Journal of the European Ceramic Society - Volume 32, Issue 16, December 2012, Pages 4363–4369