长余辉发光粉SrAl_2O_4∶Eu,Dy在搪瓷涂层中的发光性质  

Luminescence Properties of SrAl_2O_4∶Eu^(2+),Dy^(3+) in Enamel Coating

作　　者：廉志红[1] 李成宇[1] 王瑞生[2] 李如椿[2] 吕玉华[1] 苏锵[1] 

机构地区：[1]中国科学院长春应用化学研究所稀土化学与物理重点实验室,吉林长春130022 [2]河北理工大学材料学院,河北唐山063009

出　　处：《发光学报》2006年第4期489-494,共6页Chinese Journal of Luminescence

基　　金：国家重点基础研究发展规划(G1998061312);吉林省科技厅科技攻关(20020601)资助项目

摘　　要：采用高温固相反应法制备了SrA l2O4∶Eu2+,Dy3+长余辉发光粉,将发光粉掺到以碱金属硼磷酸盐低熔点玻璃熔块为基质的搪瓷釉中,并通过丝网印刷技术涂搪到铝合金基板上,然后烧制成长余辉搪瓷。研究了发光粉的加入量、釉层厚度、烧成温度、烧成时间等搪瓷工艺的各个环节对搪瓷余辉性能的影响,制得性能稳定的长余辉涂层,余辉时间长达12 h以上。这种发光搪瓷涂层可用于制作广告牌、交通标牌、建筑物标示牌等,在许多领域具有广阔的应用前景。Aluminates activated by rare earth Eu^2＋ ion are new long lasting photoluminescence materials. These materials have recently attracted more attention due to not only their bright luminescence and super long afterglow without radioactivity but also the extensive application. The SrAl2O4：Eu,Dy^3＋ long lasting photoluminescence powders were synthesized by high temperature solid state reaction in a reducing atmosphere. By using of low melt point alkali metal borophosphate glass as the basic glaze, SrAl2O4：Eu,Dy^3＋ powder and enamel glaze were mixed up homogeneously, and long lasting photoluminescence enamel coating was prepared by sintering the mixture on the substrate of aluminum alloy. The phosphorescence spectrum of the luminescent enamel is similar to that of the SrAl2O4：Eu,Dy^3＋ powder in both the shape and peak position, i. e. , a broad band with maximum emission intensity at about 515 nm. Therefore, the long lasting photoluminescence of the enamel is due to the 5d-4f transition of divalent europium. The effects of the amount of the doped phosphor, enamel thickness, sintering temperature and sintering period on the luminescence properties of the enamel coating have been investigated. It is observed that the phosphorescence brightness of the enamel is improved with that of the doped SrAl2O4：Eu,Dy^3＋ powder. And with the increase of the thickness of the enamel, the brightness of the enamel also increases. When the sintering temperature and the sintering time is increased, the brightness of the enamel will be decrease, which is ascribed to the destroying of SrAl2O4：Eu,Dy^3＋. Therefore, low melting temperature and short reaction time is of great benefit to improve the brightness of the enamel. Because the porcelain enamel has the characters of bright phosphorescence, long persistent period and smooth surface and so on, it is expected to be widely used in the field of advertisement board, traffic indicating board and building, etc.

关 键 词：SrAl2O4:Eu Dy^3+ 长余辉发光 搪瓷涂层 

分 类 号：O482.31[理学—固体物理]