The development of optical temperature sensors is of fundamental and industrial importance for various applications. Despite the great advance in optical temperature-sensing techniques, challenges remain to search for novel sensing materials with low cost, easy fabrication and high sensitivity. Here, transparent glass ceramics (GC) embedded with cubic Sr_0.84Lu_0.16F_2.16:Yb³⁺/Er³⁺ nano-crystals were prepared via thermal annealing on the parent glass. The optical and structural properties were investigated. The enhanced emission intensity, obvious Stark splitting and prolonged lifetimes of Er³⁺ confirm the enrichment of Er³⁺ ions into formed Sr_0.84Lu_0.16F_2.16 nano-crystals. The temperature sensing performance of Yb³⁺/Er³⁺ ions in Sr_0.84Lu_0.16F_2.16GC were investigated based on up-conversion intensity ratio (FIR) from thermally coupled emitting states of Er³⁺. High energy difference ($\Delta E$ = 839 cm⁻¹) and high absolute sensitivity (27.4 × 10⁻⁴ K⁻¹ at 606 K) are obtained. Our results reveal Sr_0.84Lu_0.16F_2.16GC are excellent host for rare earth ions doping and potential candidate for optical thermometry.

光学温度传感器的发展对于各种应用具有根本和工业重要性。尽管光学温度传感技术取得了巨大进步，但寻找低成本，易于制造和高灵敏度的新型传感材料仍然面临挑战。在此，通过在母玻璃上进行热退火来制备嵌入有立方Sr _0.84 Lu _0.16 F _2.16：Yb ³⁺ / Er ³⁺纳米晶体的透明玻璃陶瓷（GC）。研究了光学和结构性质。增强的发射强度，明显的Stark分裂和Er ^3+的寿命延长证明了Er ³⁺离子富集到形成的Sr中_0.84 Lu _0.16 F _2.16纳米晶体。基于Er ^3+的热耦合发射态的上转换强度比（FIR），研究了Sr _0.84 Lu _0.16 F _2.16 GC中Yb ³⁺ / Er ³⁺离子的温度传感性能。高能量差（$\Delta E$ = 839 cm ^-1）并获得高绝对灵敏度（606 K时为27.4×10 ^-4  K ^-1）。我们的结果表明，Sr _0.84 Lu _0.16 F _2.16 GC是稀土离子掺杂的极好宿主，并且是光学测温的潜在候选者。