高分子网络凝胶法制备Eu∶YAG纳米粉体及其表征  

Preparation and Characterization of Nd∶YAG Nano-powders by Polyacrylamide Gel Method

作　　者：罗建勇[1] 陈寰[1] 姜龙[1] 孙玉阳[1] 曾天[1] 晋勇[1] 焦志峰[1] 龚敏[2] 刘俊刚[3] 孙小松[1] 

机构地区：[1]四川大学材料科学与工程学院,成都610064 [2]四川大学物理科学与技术学院,成都610064 [3]重庆光电技术研究所,重庆400060

出　　处：《半导体光电》2014年第3期457-460,共4页Semiconductor Optoelectronics

摘　　要：利用高分子网络凝胶法制备了Eu∶YAG纳米粉体,样品的性能通过热重-差热分析、X射线衍射分析、扫描电子显微镜、透射电子显微镜、激发谱和发光光谱进行了表征。结果表明,Eu∶YAG纳米晶体的形成温度为900℃,比固相反应法低700℃;Eu∶YAG纳米粉体呈珊瑚虫状形貌,粒径大小为100-150nm;Eu∶YAG纳米粉体的荧光谱在594nm处出现最强发射峰,发光强度随着Eu3＋浓度从1at.%增加至5at.%的过程而逐渐增强,在浓度继续由6at.%增加至8at.%的过程中出现了浓度猝灭现象,并讨论了引起该现象的机理原因。The preparation of Eu-doped YAG nano-phosphors via the novel synthesis process based on the polyacrylamide gel method was introduced,then the samples were characterized by thermo-gravimetric analysis,differential scanning calorimetry,X-ray diffraction,scanning electron microscopy,transmission electron microscopy,the excitation or emission spectroscopy.It is found that the forming temperature of Eu∶YAG nano-phosphor can be as low as 900℃,which is 700℃ lower than that of the solid-state method;Eu∶YAG nano-phosphors is of coral shape and the particle size ranges from 100 to 150nm;the photoluminescence spectrum of the Eu∶YAG nano-phosphors exhibits the strongest emission peak at 594nm,the emission intensity of which increases steadily with increasing Eu3＋ concentration from 1at.% to 5 at.%.Fluorescence quenching effect was observed with further increasing the concentration of Eu3＋ from 6at.% to 8at.%,and also the probable mechanism of this phenomenon is discussed.

关 键 词：Eu∶YAG纳米粉体 高分子网络凝胶 结晶 形貌 发光 

分 类 号：TB383[一般工业技术—材料科学与工程]