NaY_(9)(SiO_(4))_(6)O_(2):Bi^(3+),Eu^(3+)荧光材料的合成及温敏特性

Synthesis and thermometric performance of NaY_(9)(SiO_(4))_(6)O_(2):Bi^(3+),Eu^(3+)phosphor

为寻找高性能荧光温敏探针材料,用荧光强度比率法,对NaY_(9-x-y)(SiO_(4))_(6)O_(2):xBi^(3+),y Eu^(3+)荧光粉体的温敏特性进行了研究.结果表明:该材料中存在Bi^(3+)→Eu^(3+)的高效能量传递,单一波段激发Bi^(3+)发光离子,可获得Bi^(3+)和Eu^(3+)的双发射荧光光谱;温度升高时,Eu^(3+)发射光谱的猝灭速率比Bi^(3+)缓慢;根据不同温度下2种发光光谱强度的比值,获得了NaY_(6.192)(SiO_(4))_(6)O_(2:0.108)Bi^(3+),2.7Eu^(3+)在300~450 K最高相对灵敏度为1.51%·K^(-1),大大优于可实用温敏材料的相对灵敏度数值(0.3%·K^(-1)),该材料具有较大的实际应用前景.

To search probe phosphors with better performance temperature,using the ratio method of the fluorescence intensity,the thermosensitive performance of the NaY_(9-x-y)(SiO_(4))_(6)O_(2:x)Bi^(3+),y Eu^(3+)phosphor has been studied.The results show the efficient energy transfer from Bi 3+to Eu 3+can be observed.With the excitation of Bi^(3+),the double emission spectra of Bi^(3+)and Eu^(3+)can be acquired.With the increase of the temperature,the fluorescence intensity quenching speed of Eu^(3+)is slower than that of Bi^(3+).Based on the temperature dependent fluorescence intensity ratio of Bi^(3+)to Eu^(3+),the relative sensitivity(S r)values of the NaY_(6.192)(SiO_(4))_(6)O_(2:0.108)Bi^(3+),2.7Eu^(3+)probe phosphor at the temperature range of 300 to 450 K have been calculated.The maximum(S r)is 1.51%·K^(-1),which is much better than the suggested value of 0.3%·K^(-1)for the practical applications.The temperature probe phosphor in this work showed the potential in the temperature sensitivity fields.