SrAl2O4：Eu^2＋，Dy^3＋长余辉光致发光材料的固相反应法合成与特性

Preparation of Long Persistent Phosphorescence SrAl2O4:Eu2+ ,Dy3+ Phosphors by Solid State Reaction and Characterization

摘要:

采用高温固相反应法，在还原气氛下制备了掺稀土离子Eu^2 和Dy^3 的铝酸锶长余辉光致发光材料。XRD研究表明，所制备的铝酸盐具备SrAl2O4的晶体结构。SrAl2O4：Eu^2 ，Dy^3 发光材料的发光光谱是中心位于520nm的带状谱，激发峰波长范围位于300nm～500nm，发光余辉可持续12h以上。研究了SrAl2O4：Eu^2 ，Dy^3 发光材料的耐温性和耐水性，结果表明，随热处理温度升高，发光亮度下降；水浸使发光材料与水反应生成水化物，使发光性能下降。

Abstract:

A long persistent phosphorescence S rAl 2 O 4 :Eu 2+ ,Dy 3+ phosphor powder was prepared by high temperature solid state reaction in a reducing atmosphere.XRD research o n its structure indicates that all th e synthestized aluminate is SrAl 2 O 4 crystal.The study of SrAl 2 O 4 :Eu 2+ ,Dy 3+ spetra indicates that the luminescence spectra of SrAl 2 O 4 :Eu 2+ ,Dy 3+ is the broad band spectra peaking at 520nm,and the ex-citation spectrum ranges from 300nm to 500nm.The measurement of the phosphorescence shows that the persiste nt time of the phosphores-cence lasts more than 12hours.The re sistance of SrAl_2O_4:Eu~(2+),Dy~(3+) to temperature and water was also stu died.