Eu^(2+)、Dy^(3+)共掺杂碱土金属硅酸盐荧光粉的制备及性质  

Preparation and Properties of Eu^(2+),Dy^(3+) Co-Doped Alkaline Earth Silicate Fluorescent Powders

作　　者：王晓端[1] 赵亚娟[1] 张勇[1] 李兆[2] 陈利君[1] 陈双莉[1] 谢会东[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]西安航空学院,陕西西安710077

出　　处：《激光与光电子学进展》2017年第10期368-375,共8页Laser & Optoelectronics Progress

基　　金：国家级大学生创新训练计划项目(201510703137);陕西省教育厅专项科研计划项目(2013JK0704);陕西省尾矿资源综合利用重点实验室开放基金(2014SKY-WK009);西安市碑林区科技计划项目(GX1313)

摘　　要：利用高温固相法及微波燃烧法合成了Eu^(2+)、Dy^(3+)共掺杂的碱土金属硅酸盐荧光粉,通过扫描电子显微镜、X射线衍射仪、荧光分析仪对荧光粉的性能进行了分析测试。结果表明,在1150℃下,当Eu^(2+)/Dy^(3+)的掺杂比(摩尔分数比)为1…3时,高温固相法合成的Ba_5Si_8O_(21)…Eu^(2+),Dy^(3+)荧光粉的荧光性能最好。对比高温固相法与微波燃烧法可知,微波燃烧法可缩减产品的合成时间,但产品发光强度较低。对比合成的Sr_2MgSi_2O_7…Eu^(2+),Dy^(3+)和Ba_5Si_8O_(21)…Eu^(2+),Dy^(3+)的性能可知,碱土金属离子的种类会对荧光粉的发射波长产生影响。Ba_5Si_8O_(21)…Eu^(2+),Dy^(3+)荧光粉具有良好的耐水性,水浸24h后,其荧光损失率仅为2.3%,可应用于荧光涂料。Eu^2＋ and Dy^3＋ co-doped alkaline earth silicate fluorescent powders are synthesized by the high temperature solid-phase method and the microwave combustion method. The properties of the fluorescent powders are analyzed and measured by scanning electron microscope, X-ray diffractometer and fluorescence analyser. The results show that the Ba5Si8O21：Eu^2＋,Dy^3＋ fluorescent powders synthesized by the high temperature solid-phase method have the best fluorescence property when they are sintered at 1150 ℃ and the Eu^2＋/Dy^3＋ ratio （the ratio of mole fraction） is 1：3. Comparing the high temperature solid-phase method with the microwave combustion method, it is found that the microwave combustion method can reduce the synthesis time of Ba5Si8O21：Eu^2＋,Dy^3＋ significantly, but the luminescent intensity of products is low. Comparing the properties of the synthesized Sr2 gSi2O7 ：Eu^2＋ , Dy^3＋ with those of Ba5Si8O21：Eu^2＋,Dy^3＋ , it is found that the type of alkaline earth metal ions has an effect on the emission wavelength of fluorescent powders. Ba5Si8O21：Eu^2＋,Dy^3＋ fluorescent powders have good water resistance, and their fluorescence loss rate is only 2.3% after 24-h water immersion, which can be applied to fluorescent coatings.

关 键 词：材料 硅酸盐 长余辉 微波燃烧 EU^2+ Dy^3+共掺杂 

分 类 号：TQ17[化学工程—硅酸盐工业]