对天然芒硝和GdF3,EuF3的混合粉末,先用马弗炉在空气中1000℃下加热30 min,后用微波750℃下加热10 min,制备了Na2SO4 ∶ Eu,Gd、Na2Gd2(SO4)∶Eu等系列荧光粉.研究了天然无水芒硝与铕浓度不变的情况下钆浓度的变化对发光性能的影响.结果表明:掺入Gd3+对样品的发光有增强作用.随着Gd3+浓度的增加Eu3+的610 nm发光强度变大,因此Gd3+可能起到能最传递的桥梁作用,使能量在基质与激活剂离子之间高效传递.当Gd3+以21mol％掺入到无水芒硝(Na2SO4∶Eu)晶格中时,可以达到Eu3+的最强发光强度和最佳的色纯度,最终出现浓度猝灭现象.%The authors prepared Na2SO4:Eu, Gd, and Na2Gd2(SO4)4: Eu phosphors by heating, the mixed powder of GdF3, EuF3 and natural mirabilite with muffle furnace at 1 000℃ for 30 min and continually heating it with microwave at 750 ℃ for 10 min. With increasing the concentrations of Gd ion, the 610 nm emission intensity due to Eu3+ was strengthened Gd3+ probably formed a bridge between substrate and the activator so that the energy is able to be transferred efficiently. The luminescence intensity, along with colorimetric purity, reaches the top with 21 mol% Gd3+ doping in the thenardite (Na2SO4 : Eu) lattices, eventually coming up the quenching effects of concentration.
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