Preparation and characterization of BaMgAl10O17:Eu phosphor coated with MgFz by sol-gel process |
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作者姓名: | 李峰 王育华 |
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作者单位: | DepartmentofMaterialsScience,LanzhouUniversity,Lanzhou730000,China |
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摘 要: | In order to prevent BaMgAl10O17: Eu (BAM) phosphor from thermal degradation, MgF2-coatings on the surface of BAM were prepared by a sol-gel process. The coatings were characterized by X-ray photoelectron spectroscopy and scanning electron microscopy. The results indicate that BAM is successfully coated with homogenous, close MgF2 coatings. The photoluminescence and anti-thermal degradation properties of coated BAM were investigated under 254 and 147 nm excitations. The optimum anti-thermal degradation properties are obtained at the mass ratio of MgF2 to BAM 0. 2% under 254 nm excitation and 0. 5% under 147 nm excitation, respectively. It is considered that trace MgO formed after baked would cause different optimum coating thicknesses under 254 and 147 nm excitations.
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关 键 词: | BaMgAl10O17合金 热退化 溶胶-凝胶体 电镀工艺 铕 氟化镁 |
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