掺杂Yb3+的氟氧化物微晶玻璃的析晶特性及发光性能  

Crystallization Characteristics and Luminescent Properties of Oxyfluoride Glass-ceramic Doped with Yb3+

作　　者：李梦萱 刘洪波 刘见祥[1] 朱明燕[1] 王毅 LI Mengxuan;LIU Hongbo;LIU Jianxiang;ZHU Mingyan;WANG Yi(Guizhou Metallurgical Chemical Industry Research Institute,Guiyang 550007)

机构地区：[1]贵州省冶金化工研究所

出　　处：《材料导报》2019年第16期2644-2647,共4页Materials Reports

摘　　要：本实验以Al 2O 3、SiO 2、Na 2CO 3、CaF 2、PrF 3、YbF 3为原料,采用传统高温熔融工艺制备氟氧基质玻璃,再晶化处理制得Pr^3+-Yb^3+共掺杂氟氧微晶玻璃。利用差热分析(DTA)仪、X射线衍射(XRD)仪、扫描电子显微镜(SEM)以及荧光光度计等研究Yb^3+掺杂浓度对氟氧微晶玻璃晶化行为及发光性能的影响。结果表明:随着Yb^3+掺杂浓度的增大,基础玻璃析晶温度先降低后升高;Yb^3+会进入基础玻璃的析出相即CaF 2纳米晶格中,形成Ca 0.8 Yb 0.2 F 2.2固溶体,微晶玻璃中结晶相的含量以及晶粒尺寸都有所增大。Pr^3+-Yb^3+共掺微晶玻璃中,Pr^3+参与了Yb^3+的近红外发光,可见光区域的发射峰强度随着Yb^3+浓度的增大而递减,而近红外区域的发射峰却增强。这揭示了Pr^3+-Yb^3+之间的能量传递过程,即处于Pr^3+激发态的3P 0能级高效地将能量传递给Yb^3+,并通过2F 5/2→2F 7/2跃迁转化为近红外发光。Using Al 2O 3,SiO 2,Na 2CO 3,CaF 2,PrF 3 and YbF 3 as raw material,basic oxyfluoride glass were prepared through high temperature melting and annealing processes,finally,glass-ceramics doped with Pr^3+-Yb^3+was prepared under adaptive heat treatment systems.The crystallization characteristic and luminescent properties which contact with different Yb^3+concentration was investigated by DTA,XRD,SEM and spectrophotometer analytical testing methods.The results show that with the increase of Yb^3+doping concentration,the crystallization temperature of the base glass decreases first and then increases,Yb^3+will join into nano-lattice of CaF 2 then form Ca 0.8 Yb 0.2 F 2.2 solid solution,also the conent and grain size of the crystalline phase in this glass ceramic are both increased.The emission peak intensity in the visible regions decreasing with the increase concentration of Yb^3+,yet the emission peak in near infrared region was increases,which shows that in the excited state 3P 0 level of Pr^3+will transfer more energy to the 2F 5/2→2F 7/2 transition of Yb^3+then strengthen the near-infrared emission.

关 键 词：氟氧微晶玻璃 CaF2微晶 析晶特性 发光性能 

分 类 号：TQ171.1[化学工程—玻璃工业]