【摘要】 以硝酸盐和尿素为基质,采用燃烧法在较低炉温(600～620℃)下制备了SrAl2O4:Eu2+、Dy3+、Pr3+长余辉发光粉体。研究了H3BO3的加入对粉体的相组成、晶体结构、发光性能与长余辉特性的影响。通过对材料的XRD、激发和发射光谱、余辉衰减以及微观形貌分析。结果表明,H3BO3作为一种助溶剂,当其掺杂摩尔百分含量为0.65%时,有利于SrAl2O4存在合成温度较高,灼烧时间长且所得产物硬度大等缺点,此外,产物经常需研磨,但是研磨后余辉性能会遭到破坏。因此常在原始组份中加入对材料的合成起到促进作用的助溶剂,常用的助溶剂有P2O5、CaF2、H3BO3、NaF等[9]。本文采用燃烧法代替直接的固相混合,其最大的优点是快捷和节能,与高温固相法相纯相的形成,同时对粉体的初始亮度及发光性能有显更多还原

【Abstract】 SrAl2O4:Eu2+,Dy3+,Pr3+long afterglow phosphor were prepared by combustion at lower temperature(600-620℃),using nitrate and carbamide as starting materials.The effect of H3BO3 on the phase composing,crystal structure,luminescence capability and long afterglow characteristic of SrAl2O4:Eu2+,Dy3+,Pr3+ was investigated in this paper.When mass percentage of H3BO3 was 0.65%,it played a great role in stabilizing SrAl2O4 phase and greatly improving the initial brightness and luminescence properties of powder judged from the XRD patterns,excitation and emission spectra,decay curves,mictocosmic structure of SrAl2O4:Eu2+,Dy3+,Pr3+ phosphor.The sample had the characteristics of loose texture,good crystal,uniformity mixed and good luminous intensity.更多还原