کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
177200 | 458969 | 2011 | 6 صفحه PDF | دانلود رایگان |
Photoluminescence and coloring properties of Eu2+/Co2+ codoped BaMgAl10O17 were investigated to produce inorganic blue-luminescent pigments. Two kinds of synthesis methods were employed for BaMgAl10O17:Eu2+,Co2+ powders based on a conventional solid-state reaction and a newly developed precipitation method. Powder samples through the solid-state reaction exhibited blue photoluminescence from Eu2+, which was quenched considerably by codoping with Co2+ due to the occurrence of a Eu2+ → Co2+ energy transfer. The precipitation method was then conceived to separate Eu2+ and Co2+ spatially in a BaMgAl10O17 particle. Powder samples through the precipitation method could be colored blue by optical absorption of Co2+ without degrading blue photoluminescence from Eu2+. The inhomogeneous distribution of the Eu2+/Co2+ dopants in the BaMgAl10O17 particles was instrumental to the suppression of the Eu2+ → Co2+ energy transfer.
► Blue-luminescent pigments were produced in a Eu2+/Co2+ codoped BaMgAl10O17 system.
► We employed both a solid-state reaction and a newly developed precipitation method.
► Homogeneous distribution of the Eu2+/Co2+ dopants resulted in luminescence quenching.
► Inhomogeneous distribution of the dopants led to blue coloring and blue luminescence.
Journal: Dyes and Pigments - Volume 91, Issue 1, October 2011, Pages 49–54