High dispersibility and enhanced luminescence properties of BaMgAl10O17:Eu2+ phosphors derived from molten salt synthesis

•Firstly preparation of BaMgAl10O17:Eu2+ phosphors by the MSS method.•The crystallinity and dispersibility of the phosphors are effectively improved.•Li+ doping is benefit for the thermal stability of the resulting phosphors. BaMgAl10O17:Eu2+ (BAM) phosphors were prepared via the molten salt synthes...

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Bibliographic Details
Published in:Optical materials 2015-08, Vol.46, p.432-437
Main Authors: Wang, Xiang, Li, Jin-hong, Shi, Ping-lu, Guan, Wei-min, Zhang, Hong-yao
Format: Article
Language:English
Subjects:
Dispersibility
Luminescence
Molten salt synthesis
Phosphors
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Summary:•Firstly preparation of BaMgAl10O17:Eu2+ phosphors by the MSS method.•The crystallinity and dispersibility of the phosphors are effectively improved.•Li+ doping is benefit for the thermal stability of the resulting phosphors. BaMgAl10O17:Eu2+ (BAM) phosphors were prepared via the molten salt synthesis (MSS) method. The NaCl–KCl eutectic mixture and LiF were used as the molten salt and flux, respectively. X-ray powder diffraction (XRD) patterns indicate that the BAM phase is formed above 1200°C and that the addition of LiF leads to an obvious improvement in crystallinity. The emission intensity of the BAM phosphor with 10wt% LiF is about 85% higher than that of the phosphor without LiF and about 200% higher than that of the phosphor without molten salt and LiF. Scanning electron microscopy (SEM) reveal that the as-prepared phosphors have good crystallinity and regular morphology, and most importantly, they are not aggregated. Li+ doping is benefit for the thermal stability and results in a slightly longer decay times of 1.17μs.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2015.04.060