H_3BO_3对燃烧法制备SrAl_2O_4:Eu^(2+)、Dy^(3+)、Pr^(3+)发光性能的影响  

Effect of H_3BO_3 flux on luminescent properties of SrAl_2O_4:Eu^(2+)、Dy^(3+)、Pr^(3+) prepared by combustion synthesis

作　　者：樊国栋[1] 肖国平[1] 张昭[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《功能材料》2011年第2期244-247,共4页Journal of Functional Materials

基　　金：陕西省科技攻关资助项目(2008K07-32);陕西科技大学研究生创新基金资助

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。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.

关 键 词：燃烧法 稀土 助溶剂 SRAL2O4 发光材料 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]