掺钕M′-型钽酸钆微晶荧光的温度和压力依赖性  

Temperature and Pressure Dependences of Luminescence from Nd-Doped M′-Type Gadolinium Tantalate Microcrystals

作　　者：李晗[1] 周鹏宇 LI Han;ZHOU Pengyu(School of Science,Northeast Electric Power University,Jilin 132012,Jilin,China)

机构地区：[1]东北电力大学理学院,吉林吉林132012

出　　处：《硅酸盐学报》2022年第9期2493-2500,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然基金委青年基金(11804047)。

摘　　要：M′-型Nd^(3+):GdTaO_(4)微晶被成功合成并用于变温和变压光谱测试研究。在293~373 K的测试温度范围内,^(3)F_(3/2)→^(4)I_(9/2)跃迁的光谱位置具有高热稳定性,^(3)F_(3/2)(R_(2))→^(4)I_(9/2)(Z_(5))跃迁的温度系数仅为0.0039 cm^(−1)·K^(−1),^(3)F_(3/2)(R_(2))→^(4)I_(9/2)(Z_(2))和^(3)F_(3/2)(R_(1))→^(4)I_(9/2)(Z_(2))跃迁荧光的强度比具有高温度依赖性,在生理温度范围内的相对灵敏度为(0.60-0.52)(%·K^(–1))。在高达11.39 GPa的测试压力范围内,所有跃迁随压力呈线性移动。^(3)F_(3/2)(R_(2))→^(4)I_(9/2)(Z_(5))跃迁的光谱位置对压力非常敏感,其灵敏度为15.18 cm^(−1)·GPa^(−1)。此外,各跃迁的荧光强度和光谱宽度在升温和增压过程中的变化也被分析和讨论。与其它近红外光学传感器的对比表明,M′-型Nd^(3+):GdTaO_(4)在温度和压力传感方面具有良好性能。M′-type Nd^(3+):GdTaO_(4)microcrystals,synthetized by a molten salt synthesis method,were investigated via temperature-/pressure-dependent photoluminescence measurement.In the test temperature range 293-373 K,the spectral positions of emissions from^(3)F_(3/2)→^(4)I_(9/2)transition exhibit high thermal stabilities.The temperature coefficient of^(3)F_(3/2)(R_(2))→^(4)I_(9/2)(Z_(5))transition is only 0.0039 cm^(-1)·K^(−1).The intensity ratio between transitions of^(3)F_(3/2)(R_(2))→^(4)I_(9/2)(Z_(2))and^(3)F_(3/2)(R_(1))→^(4)I_(9/2)(Z_(2))has a large temperature dependence,and its relative sensitivity in the physiological temperature range is(0.60-0.52)(%·K^(-1)).In the test pressure range 10^(5) Pa^(-1)1.39 GPa,all the transitions linearly shift with pressure.The spectral position of^(3)F_(3/2)(R_(2))→^(4)I_(9/2)(Z_(5))transition is very sensitive to pressure,with a sensitivity of 15.18 cm^(-1)·GPa^(−1).The intensities and spectral widths of the transitions in the heating and compression processes were also analyzed.Compared with the other optical sensors in the near-infrared wavelength range,the good performance of M′-type Nd^(3+):GdTaO_(4)in temperature and pressure sensing was revealed.

关 键 词：钕离子 稀土钽酸盐 光致发光 温度传感 压力传感 

分 类 号：O469[理学—凝聚态物理]