Luminescent thermometry is a noninvasive method of temperature detection with high sensitivity and response speed. The present study demonstrated the process-intensified synthesis of ytterbium and erbium codoped calcium molybdate phosphors (CaMoO₄:Yb³⁺/Er³⁺). The experiment involved the initial premixing of the precursors using a high-gravity rotating packed bed (RPB) reactor and subsequent calcination processing. The pronounced mass transfer and micromixing of the reactants in the RPB facilitated the scalable and controllable synthesis of CaMoO₄:Yb³⁺/Er³⁺ particles with submicron sizes and regular morphologies. The CaMoO₄:Yb³⁺/Er³⁺ particles exhibited a bright-green emission with temperature-dependent luminescence characteristics under 980 nm laser irradiation. Furthermore, the maximum absolute sensitivity was determined to be 0.02837 K⁻¹. These results indicated that the synthesized product was a suitable candidate for application in upconversion luminescent thermometers capable of temperature sensing at the microscale.

中文翻译：

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镱和铒共掺杂钼酸钙磷光体的可扩展合成作为上转换发光温度计

发光测温是一种灵敏度高、响应速度快的无创温度检测方法。本研究证明了镱和铒共掺杂的钼酸钙磷光体（CaMoO ₄ :Yb ³⁺ /Er ³⁺）的工艺强化合成。该实验涉及使用高重力旋转填充床 (RPB) 反应器对前体进行初始预混，然后进行煅烧处理。RPB 中反应物的显着传质和微混合促进了具有亚微米尺寸和规则形态的 CaMoO ₄ :Yb ³⁺ /Er ³⁺颗粒的可扩展和可控合成。CaMoO ₄ :Yb ³⁺ /Er³⁺粒子在 980 nm 激光照射下表现出具有温度依赖性发光特性的亮绿色发射。此外，最大绝对灵敏度被确定为0.02837 K ^-1。这些结果表明，合成的产品是适用于能够在微尺度上进行温度传感的上转换发光温度计的合适候选者。