【摘要】 采用燃烧法成功合成了稀土掺杂铝酸锶长余辉发光材料。XRD结果表明,当铝锶n(Al)∶n(Sr)=2时,发光基质中只存在SrAl2O4相结构。随着Al∶Sr比值的增大,出现新相Sr4Al14O25。当Al∶Sr比值增大到4时,SrAl12O19相开始形成。而Al∶Sr比值增大到12时,全部为SrAl12O19相。光致发光测量结果表明,发光样品SrAl2O4∶Eu2+,Dy3+发射谱峰值位于519nm,而发光样品SrAl12O19∶Eu2+,Dy3+的发射峰位于512nm。余辉检测结果表明,不同结构铝酸锶发光样品的衰减都是由初始的快衰减过程和其后的慢衰减过程组成,但是不同结构铝酸锶发光样品的初始亮度和发光衰减快慢不同。更多还原

【Abstract】 Rare-Earth doped strontium aluminate phosphors were synthesized through combustion method.XRD results indicate that the dominant host phase is SrAl2O4 when n(Al)∶n(Sr)=2.With the increasing of Al∶Sr ratios,the new crystalline phase of Sr4Al14O25 was initially formed.The phase SrAl12O19 was formed when Al∶Sr ratios increased to 4,and this phase was the dominate phase when Al∶Sr ratios increased to 12.The emission spectra show that the peaks of SrAl2O4∶Eu2+,Dy3+ and SrAl12O19∶Eu2+,Dy3+ lied round 519 and 512nm,respectively.The decay curves show that the decay process of all the samples with different crystalline phases consist of the initial fast process and the latter slow process.Intensity and decay lifetimes of the samples vary with the different crystalline phases.更多还原