溶胶-凝胶法合成Y_2O_3-SiO_2∶Eu^(3+),Bi_(3+)发光体及发光特性研究

Synthesis and Luminescence of Phosphor Y 2O 3-SiO 2∶Eu 3+ ,Bi 3+ by Sol Gel Method

采用溶胶－ 凝胶法低温合成了Ｙ２Ｏ３ － ＳｉＯ２ ∶Ｅｕ３＋ ，Ｂｉ３＋ 发光体，研究了烧结温度、Ｅｕ３＋ 及Ｂｉ３＋ 浓度、Ｙ２ Ｏ３ 与ＳｉＯ２ 的配比对发光强度的影响。通过Ｘ射线粉末衍射、热重及差热分析，研究了由凝胶至发光晶体的转变，通过激发光谱和发光光谱的测试，讨论了材料的发光特性及Ｂｉ３＋ 对Ｅｕ３＋ 的敏化作用。

The luminescent material of Y 2O 3-SiO 2∶Eu 3+ ,Bi 3+ was synthesized at low temperature by sol gel method.Transtion from gel to crystalline was studied by XRD,TG and DTA.The luminescent properties of phosphor and the effect of Bi 3+ on the sensitization of Eu 3+ were observed by studying its excitation and emission spectra.