【作者】 杨珂；

【导师】 黄平；

【作者基本信息】 太原理工大学 ， 凝聚态物理学， 2012， 硕士

【摘要】 自二十世纪中期以来,稀土发光材料迅速在照明显示、装饰信号、安全运输等领域得到广泛的应用。作为红色发光材料的Y2O3:Eu3+和Y2O2S:Eu3+由于其发光色度纯、化学性质稳定备受国内外研究者的关注。本文在表面活性剂辅助下合成了性能稳定、发光性能优良的Y2O3:Eu3+和Y2O2S:EuJ3+,Mg2+,Ti4+红色发光材料。通过改变合成条件和原料配比,详细讨论了离子交换、烧结温度、升温速率、PH值、反应时间、SDS浓度对Y2O3:Eu3+形貌和发光性能的影响,并获得了最佳的工艺参数。同时研究了微观形貌变化对产物发光性能的影响,讨论了发光机理。讨论了在表面活性剂辅助下合成的Y2O2S:Eu3+,Mg2+,Ti4+与传统高温固相法合成的Y2O2S:Eu3+,Mg2+,Ti4+在形貌和发光性能上的区别,利用XRD、 SEM PL、 TL对样品进行了表征。结果表明：在表面活性剂辅助下合成的样品与传统高温固相法合成的样品相比,最佳合成温度降低了200～300℃；表面活性剂的添加影响了样品的表面形貌,而样品的发光性能基本一致；同时对Y2O2S:Eu3+,Ng2+,Ti4+的发光机理进行了讨论。更多还原

【Abstract】 Since the middle of20th century, rare-earth luminescent materials have been widely applied in the fields of lighting display, adornment signal, safe transportation, etc. The red luminescent materials Y2O3:Eu3+and Y2O2S:Eu3+have been paid much attention for the high brightness and good chemical stability.In this paper, Y2O3:Eu3+and Y2O2S:Eu3+,Mg2+,Ti4+was synthesized via surfactant assisted, and the red luminescent materials with excellent stability and luminescent property were prepared. Effects of ion exchange, sintering temperature, heating rate, PH value, reaction time, concentration of SDS on the morphology and luminescent property of Y2O3:Eu3+were investigated by changing the synthesis conditions and the ratio of raw materials. After a series of experiments, the optimal reaction conditions were obtained. Influence of microstructure on luminescent property of the samples was studied, and the luminescent mechanism was also discussed.The difference of the surfactant-assisted method and conventional high temperature solid-phase reaction method on the morphology and luminescent property of Y2O2S:Eu3+,Mg2+,Ti4+was discussed in detail. The luminescent materials were characterized by means of XRD, SEM, PL, and TL. The results indicated that compared with the samples obtained by the conventional high temperature solid-state method, the optimum synthesis temperature of the samples prepared by the surfactant-assisted method decreased by200～300℃. The luminescent properties of the samples prepared by the two methods were similar. Morphology of the samples was affected by introduction of surfactant SDS. The luminescent mechanism of the samples was also discussed.更多还原