摘要
采用CO_(2)激光区熔法制备了Y_(2)O_(3):x%Sm^(3+)(x=0.2,0.5,0.7,1,2)荧光材料。在465 nm半导体激光泵浦下,研究了所制备荧光材料在室温下的荧光特性,结果表明样品的Sm^(3+)离子最佳掺杂浓度为0.7%。在298~898 K温度范围内测量了Y_(2)O_(3):Sm^(3+)(0.7%)荧光材料的荧光温度特性。研究发现随着温度升高,~4G_(5/2)→~6H_(5/2)跃迁的荧光强度先增强后减弱;~4G_(5/2)→~6H_(7/2)跃迁的荧光强度随温度逐渐减弱,但在448~648 K范围内荧光强度随温度减弱的趋势变慢;~4G_(5/2)→~6H_(9/2)跃迁的荧光强度在298~548 K范围内基本不变,当温度继续升高时荧光强度逐渐减小。基于荧光强度比(FIR)技术,研究了不同光谱段之间FIR的温度传感特性,相比较于FIR_1(~4G_(5/2)→~6H_(5/2)/~4G_(5/2)→~6H_(7/2))和FIR_2(~4G_(5/2)→~6H_(5/2)/~4G_(5/2)→~6H_(9/2)),FIR_(3)(~4G_(5/2)→~6H_(7/2)/~4G_(5/2)→~6H_(5/2))和FIR_(4)(~4G_(5/2)→~6H_(9/2)/~4G_(5/2)→~6H_(5/2))的绝对灵敏度更高,其中FIR_(3)的最大绝对灵敏度和相对灵敏度分别为5.91×10^(-3)K^(-1)(315 K)和2.06×10^(-3)K^(-1)(370 K),FIR_(4)的最大绝对灵敏度和相对灵敏度分别为1.87×10^(-3)K^(-1)(465 K)和1.26×10^(-3)K^(-1)(542 K)。综上,Y_(2)O_(3):Sm^(3+)是一种适用于宽温度范围荧光温度传感的理想材料。
Y_(2)O_(3):x%Sm^(3+)(x=0.2,0.5,0.7,1,2)phosphors were prepared by the CO_(2) laser zone melting method.Under the excitation of a 465 nm laser,the luminescence properties of prepared phosphors were investigated at room temperature.The results indicate that the optimal Sm^(3+)ion doping concentration is 0.7%.The optical temperature characteristics of Y_(2)O_(3):Sm^(3+)(0.7%)phosphors were measured in the temperature range of 298~898 K.The study found that as temperature rises,the fluorescence intensity of 4G_(5/2)→6H_(5/2)transition increases first and then decreases.The fluorescence intensity of 4G_(5/2)→6H7/2 transition gradually weakens with temperature,but the trend of intensity weakens slowly with temperature in the range of 448~648 K.The fluorescence intensity of 4G_(5/2)→6H_(9/2)transition is almost unchanged in 298~548 K,and the intensity gradually decreases as the temperature continues to rise.Based on the technique of fluorescence intensity ratio(FIR),the temperature sensing characteristics of the FIR of different emission bands were investigated.The results show that compared with FIR1(4G_(5/2)→6H_(5/2)/4G_(5/2)→6H7/2)and FIR2(4G_(5/2)→6H_(5/2)/4G_(5/2)→6H_(9/2)),FIR3(4G_(5/2)→6H7/2/4G_(5/2)→6H_(5/2))and FIR4(4G_(5/2)→6H_(9/2)/4G_(5/2)→6H_(5/2))have higher absolute sensitivity.The maximum absolute and relative sensitivity of FIR3 are 5.91×10^(-3)K^(-1)(315 K)and 2.06×10^(-3)K^(-1)(370 K),respectively.The maximum absolute and relative sensitivity of FIR4 are 1.87×10^(-3)K^(-1)(465K)and 1.26×10^(-3)K^(-1)(542 K),respectively.In general,Y_(2)O_(3):Sm^(3+)is an ideal optical temperature sensing material for a wide temperature range.
作者
张雁
朱克松
吴锋
张志宏
叶林华
Zhang Yan;Zhu Kesong;Wu Feng;Zhang Zhihong;Ye Linhua(AECC Sichuan Gas Turbine Establishment,Sichuan Chengdu 610500;College of Physics,Zhejiang University,Hangzhou,310027,China)
出处
《中国稀土学报》
EI
CAS
CSCD
北大核心
2023年第6期1029-1038,I0001,共11页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(11674284)
先进航空动力创新工作站(依托中国航空发动机研究院设立)项目(HKCX2019-01-017)资助。
