基于透明KLu2F7∶Er^(3+)/Yb^(3+)纳米玻璃陶瓷光学测温研究

Optical Thermometry Based on Transparent KLu2F7∶Er^(3+)/Yb^(3+)-Nanostructural Glass-Ceramics

采用熔融淬火法制备了 KLuF:Er^(3+)/Yb^(3+)纳米晶复合玻璃陶瓷样品,利用 X 射线衍射仪表征了玻璃中析出的纳米晶种类,晶体结晶度可达 28%。分光光度计测试验证了所制备的玻璃陶瓷具有较高的光学透过率(可保持 89% 左右的透过率)。在 980 nm 激光泵浦下,玻璃陶瓷样品的上转换发光增强了约 847 倍,并且发现上转换绿光和红光均属双光子过程。基于荧光强度比技术,在温度 313~553 K 范围内研究了 Er一对热耦合能级~2H和~4S的荧光测温性能,对应的绝对测温灵敏度和相对测温灵敏度分别达到了 11. 03×10^(-4)K^(-1)和 738. 45 T^(-2)·K^(-1)。该研究结果为氟化物基玻璃陶瓷在高温传感领域性能探索提供了数据参考。

This study successfully prepares a transparent KLuF∶Er^(3+)/Yb^(3+)nano-composite glass ceramics using a high melt quenching method. X-ray diffraction was used to characterize the types of nanocrystals precipitated from the glass,and the highest crystallinity was up to 28%. A spectrophotometer was used to verify the optical transmittance of the prepared glass ceramics (approximately 89%). Under 980 nm laser pumping, the upconversion luminescence of the glass ceramic sample was increased by 847 times, and it was found that both the upconversion green and red light belongs to a two-photon process. The fluorescence temperature measurement performance of thermal coupling energy levels~2Hand~4Sof Erwas studied using the fluorescence intensity ratio technique in the range of 313-553 K, with the corresponding absolute and relative temperature sensitivity reaching 11. 03×10^(-4)K^(-1)and 738. 45 T^(-2)·K^(-1), respectively. The results provide a data reference for exploring the properties of fluoride-based glass ceramics in the field of high-temperature sensing.