基于掺铕钨酸盐荧光强度比的非接触温度传感

为了突破传统测温技术应用的局限性，利用NaY （WO₄）₂：Eu³⁺玻璃陶瓷（glass ceramics，GC）实现了具有非接触、实时响应、自校准等优势的双模荧光强度比（luminescence intensity ratio，LIR）测温。采用高温熔融淬灭法制备出含NaY （WO₄）₂：Eu³⁺纳米晶的透明GC样品，并进行系列光谱测量和热敏性能分析。结果表明，样品中Eu³⁺的激发态能级⁵D₁和⁵D₀和基态能级⁷F₂和⁷F₀为两对独立的热耦合能级，可分别基于这两对热耦合能级实现性能优异的双模LIR温度传感。该双模LIR测温技术数据可靠、测温范围广、灵敏度高，再结合GC材料优势，是可用于光纤温度传感器的核心技术材料。

Non-contact thermometry based on luminescence intensity ratio of europium-doped tungstate

A dual-mode luminescence intensity ratio (LIR) thermometry with the advantages of non-contact, real-time response and self-calibration is realized by using NaY(WO₄)₂:Eu³⁺ glass ceramics (GC) for breaking the limitations of the application of traditional thermometer. The transparent GC containing NaY(WO₄)₂:Eu³⁺ nanocrystals are prepared by high-temperature melt quenching method, followed by a series of spectroscopic measurements and thermal sensitivity performance analysis. The results show that the excited state levels ⁵D₁ and ⁵D₀ and the ground state levels ⁷F₂ and ⁷F₀ of Eu³⁺ are two independent pairs of thermally coupled levels in the NaY(WO₄)₂:Eu³⁺ GC sample. The dual-mode LIR temperature sensing with excellent performance can be realized based on these two pairs of thermally coupled levels. This dual-mode LIR temperature measurement technology with reliable data, wide temperature range and high sensitivity, combined with the advantages of GC materials, is a core technology material that can be used for fiber optic temperature sensors in the future.