中文摘要：

利用硝酸铝、硝酸锶/硝酸钡、尿素为原料,以一定比例H2O/正丁醇/CTAB的混合液作传递压力的介质进行反应,然后将得到的前驱体在还原气氛下高温煅烧,得到亮度高、余辉时间长的MAl2O4∶Eu^2＋,Dy^3＋纳米结构长余辉发光材料。TEM测试表明,高温煅烧后得到的MAl2O4∶Eu^2＋,Dy^3＋均为棒状结构,其激发光谱和发射光谱均为宽带,主发射峰分别为513和498 nm,是典型的Eu^2＋5d→4f跃迁。在对单掺Eu^2＋与双掺Eu^2＋,Dy^3＋比较的过程中,明显发现双掺Eu^2＋和Dy^3＋的强度增加,且余辉增强。材料的余辉强度随时间的变化由最初的快减过程和随后的慢减过程组成,符合I=t^-1.1双曲线规律。该方法操作简单,在不同的温度和时间下均合成出了棒状MAl2O4∶Eu^2＋,Dy^3＋,不需球磨,可直接应用。

英文摘要：

A new method to synthesize long afterglow photolumineseent material MAl2O4 ：Eu^2＋, Dy^3＋ （M = Sr, Ba） was presented. Al（NO3）3·9H2O, Sr（NO3）2/ Ba（NO3）2, urea, RE（NO3）3（RE = Eu, Dy） were employed as raw materials, the admixture of H2O/n-bu tanol/CTAB were used as medium, then MAl2O4 Eu^2＋, Dy^3＋ phosphor was achieved by calcining the precursor, which was synthesized by hydrothermal method, TEM was at 1300 ℃ under reduction atmosphere used to analyse morphology and MAl2O4 ：Eu^2＋ , Dy^3＋ （M = Sr, Ba） synthesized and annealed at 1300 ℃ were all with nanorod structure. The excitation and emission spectra of the phosphor indicated that all of them were broad band, and the main emission peak was around at 513, 498 nm, whieh was due to 5d→4f transition of Eu^2＋. The luminescent spectra and afterglow spectra of MAl2O4 ： Eu^2＋ , Dy^3＋ synthesized under different condition were examined. It was found that luminescent intensity and afterglow of the phosphor doped with Eu^2＋ , Dy^3＋ were stronger than only doped with Eu^2＋. The decay curve indicated that the decay process contained the rapid-decaying and slow-decaying component, showing the rule of hyperbola I = t^-1.1 The features of this method were that nanorod MAl2O4：Eu^2＋, Dy^3＋ can been synthesized under different temperature and different time and the method was simple without milling. The method is potential to be used in synthesizing other alkali-earth aluminate and silicate luminescent materials.