Abstract Laser-induced phosphorescence based on luminescent particles is a suitable technique for remote temperature sensing. The luminescence characteristics of the phosphor (Sr,Ca)SiAlN3:Eu2+ (”SCASN”) were investigated regarding the suitability of the material for phosphor thermometry. The phosphor has a high quantum efficiency, a very broad excitation band, an emission peak centered at about 620 nm and a short lifetime of less than 1 μ s , which makes it promising for thermometry measurements. After excitation at 532 nm, the luminescence emission reveals a blue shift with increasing temperature, which can be used for temperature calibration based on the two-color intensity ratio method. The excitation and emission characteristics are favorable for measurements in environments containing fuels and oils, which tend to fluorescence after UV-excitation. The phosphor allows for measurements up to 800 K, with a quenching temperature of 530 K. Spectral characteristics are presented for both bulk powder and a surface coating. For the former, a significant shift in the position of the emission peak is observed, which is most probably due to distinct re-absorption. A change in excitation laser fluence slightly affected the luminescence emission spectrum of both bulk material and coating and thus requires consideration in temperature determination.

中文翻译：

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用于温度传感的磷光体 (Sr,Ca)SiAlN3：Eu2+ 的表征

摘要 基于发光粒子的激光诱导磷光是一种适用于遥感温度的技术。研究了磷光体 (Sr,Ca)SiAlN3:Eu2+ (“SCASN”) 的发光特性，以确定材料对磷光体测温的适用性。该磷光体具有高量子效率、非常宽的激发带、中心在约 620 nm 处的发射峰和小于 1 μs 的短寿命，这使其有望用于温度测量。在532 nm激发后，发光发射随着温度的升高呈现蓝移，可用于基于双色强度比法的温度校准。激发和发射特性有利于在含有燃料和油的环境中进行测量，在紫外线激发后趋于荧光。磷光体允许测量高达 800 K，淬火温度为 530 K。呈现散装粉末和表面涂层的光谱特性。对于前者，观察到发射峰位置的显着偏移，这很可能是由于明显的再吸收。激发激光能量密度的变化会轻微影响块状材料和涂层的发光发射光谱，因此需要在确定温度时加以考虑。这很可能是由于明显的重吸收。激发激光能量密度的变化会轻微影响块状材料和涂层的发光发射光谱，因此需要在确定温度时加以考虑。这很可能是由于明显的重吸收。激发激光能量密度的变化会轻微影响块状材料和涂层的发光发射光谱，因此需要在确定温度时加以考虑。