利用碱金属碳酸盐提高空气中制备BaMgSiO_4∶Eu^(2+)的发光性能研究  

Enhanced the photoluminescent properties of BaMgSiO_4:Eu^(2+) prepared in air by alkali carbonate

作　　者：游潘丽[1,2] 刘丽娟[1] 姚亚东[1] 黄忠兵[1] 廖晓明[1] 尹光福[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]西昌学院工程技术学院,四川西昌615013

出　　处：《功能材料》2010年第11期2014-2017,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60871062;50873066);四川省科技攻关重点资助项目(2008SZ0021;2006Z08-001-1);教育部高等教育博士培养计划资助项目(20070610131)

摘　　要：通过高温固相反应在空气中制备了一系列Eu2+掺杂的BaMgSiO4∶Eu2+发光材料,研究了其发光性能及M2CO3(M=Li、Na、K)助溶剂对其性能的影响。利用X射线粉末衍射(XRD)、荧光光谱(PL)和扫描电镜(SEM)对合成的样品进行表征。研究表明,Eu2+进入Ba(1)和Ba(2)位置有利于Eu2+在空气中稳定存在。M2CO3(M=Li、Na、K)助溶剂促进Eu3+离子在空气中还原成Eu2+离子,提高了BaMgSiO4∶Eu2+的发光强度。当Na2CO3用量为6%时,BaMg-SiO4∶Eu2+的发光强度达到还原气氛中制备的91%。A serials of Eu^2＋ -doped BaMgSiO4：Eu^2＋ phosphors were prepared in air by high temperature solidstate reaction.The effects of alkali carbonate on the PL properties of BaMgSiO4：Eu^2＋ prepared in air were investigated by X-ray diffraction（XRD）,photoluminescence（PL）and scanning electron microscope（SEM）.The results showed that Eu^2＋ ions located in Ba（1）and Ba（2）could be in favor of stable existence in air.The PL intensity of BaMgSiO4：Eu^2＋ prepared in air was increased by adding M2CO3（M=Li,Na,K）flux,and the PL intensity of BaMgSiO4：Eu^2＋ phosphors containing 6% Na2CO3 prepared in air was the 91% of that prepared in reducing atmosphere.

关 键 词：稀土发光 碱金属碳酸盐 BaMgSiO4∶Eu^2+ 助溶剂 Eu^2+稳定性 

分 类 号：O64[理学—物理化学] O43[理学—化学]