LaMgAl_(11)O_(19):Tb的助熔剂法制备及其发光特性  

Photoluminescence of LaMgAl_(11)O_(19):Tb Phosphor Synthesized by Flux Method

作　　者：徐进章[1] 张志华[1] 王育华[1] 

机构地区：[1]兰州大学,甘肃兰州730000

出　　处：《稀有金属材料与工程》2006年第6期950-953,共4页Rare Metal Materials and Engineering

基　　金：国家科技部863计划(2003AA324020);国家自然科学基金(50272026);教育部优秀教师资助计划(2002年)项目

摘　　要：以H3BO3作助熔剂,用高温固相法在1400℃、保温4h的条件下成功制备了LaMgAl11O19:Tb单相粉末样品并研究了其紫外光、真空紫外光激发下的一系列发光特性。在紫外光(254nm)、真空紫外光(147nm)激发下,观察到Tb3+很强的5D4→7FJ(J=6,5,4,3)的跃迁发光。分析了LaMgAl11O19:Tb3+的发光强度与Tb3+掺杂浓度的关系。LaMgAl11O19：Tb was successfully synthesized by solid state reaction using H3BO3 as a flux at 1400℃ for 4 h. And their luminescent properties were investigated under UV and VUV excitation. Strong pure green emission was observed both in 254 nm and 147 nm excitations due to the ^5D4→^7F5 transition of Tb^3＋. The emission intensity of ^5D4→^7F5 was evaluated as function of Tb^3＋-content. The results indicate that the emission intensity reaches an optimum value when Tb^3＋-content is 0.15 mol/mol under UV excitation but 0.20 mol/mol under VUV excitation. This suggests that the LaMgAl11O19：Tb phosphors can be applied as the potential green phosphors in PDP.

关 键 词：助熔剂 UV/VUV LaMgAl11O19:Tb PHOSPHOR 

分 类 号：TB34[一般工业技术—材料科学与工程]