Flux Method Preparation And Photoluminescence Properties Of The BaMgAl10O17: Eu²⁺, Mn²⁺ Phosphor

Europium-doped barium magnesium aluminates phosphor (BAM) has been regarded as the preferred blue-emitting phosphor for fluorescent lamps, plasma display panels (PDPs) and Hg-free lamps because of its high luminance efficiency and good color purity under ultraviolet (UV) as well as vacuum ultraviolet (VUV) excitation. For industrial application, BAM phosphor is usually synthesized by conventional solid-state reaction at high temperature (about 1700℃). However, this method has some disadvantages, such as irregularly shaped and aggregated particles which are effects on the luminescent properties of the phosphors. In addition, BAM has a bad thermal stability. To improve the above problems, BAM were prepared by the flux assisted solid state reaction method.The major works were summarized in the following:BaMgAl10O17:Eu2+, Mn2+ blue phosphors were successfully synthesized by flux assisted solid state reaction, the synthesis temperature was 200"C lower than that of the conventional solid state method. The effect on structure, morphology and luminescent properties of the phosphor were studied. The results illustrated that the morphology and luminescence intensity were improved due to the addition of flux. Meanwhile, the stability of BAM was improved because parts ions of BAM were substituted by some small ions from flux, which leaded to a smaller lattice parameters and reduced the probability of Eu2+ ions’diffusion.