摘要
采用高温固相法在氢氩混合气中还原制备光致发光材料Sr4Al14O25∶Eu2+,Dy3+。用XRD研究Sr4Al14O25∶Eu2+,Dy3+的结构;用荧光光度计研究助熔剂用量、焙烧温度、恒温时间等因素对材料发光性能的影响;用稳态/寿命荧光光谱议研究发光材料的余辉衰减特征。结果表明,助熔剂用量、焙烧温度、恒温时间对材料的发光性能影响很大,且均存在一个最佳值。当基质原料中助熔剂用量为15%(质量),焙烧温度为1300℃,保温时间为6 h时,制得的材料发光性能最好,初始亮度达7000 cd/m2,余辉时间达15 h。XRD测试表明所制备的Sr4Al14O25∶Eu2+,Dy3+材料属正交晶系,余辉衰减服从I=At-n规律。
A long persistent phosphorescence Sr4Al14O25 ： Eu^2＋ ,Dy^3＋ phosphor powder was prepared by high temperature solid state reaction in a reduction atmosphere of hydrogen. The main factors effecting property of this phosphor were studied, including the different additions of boric acid, calciner temperature and soaking time. The investigation shows that the factors strongly affect on luminescence property, and the optimum condition is as follows： the content of the flux of 15%, calciner temperature of about 1300℃, soaking time of about 6 h. The best lumi nescent properties of the material： initial brightness is of 7000 cd/m^2 and afterglow time up to 15 h. XRD tests show that the prepared Sr4Al14O25 ： Eu^2- ,Dy^3- is an orthorhombic system, and afterglow decay obeys the law I=At^-n.
出处
《金属功能材料》
CAS
2009年第5期35-37,41,共4页
Metallic Functional Materials
基金
安徽省教育厅自然科学研究项目(KJ2009B059)
合肥工业大学创新实验资助项目(2008CXSY053)
