Abstract Ca9Zn1.5(PO4)7: Eu2+/Eu3+ phosphors had been synthesized via conventional high temperature solid-state reaction. Based on the different thermal quenching characteristics between 4f-5d transition of Eu2+ ions and 4f-4f transition of Eu3+ ions, the fluorescence intensity ratio (FIR) of Eu3+ to Eu2+ exhibits temperature dependence at the temperature from 293 to 473 K. The maximum absolute and relative temperature sensitivity of Ca9Zn1.5(PO4)7: Eu phosphor can reach up to 0.0034 K−1 and 1.4% K−1 at 453 K, respectively, when used as thermometric material. These results indicated that our study opens up an effective approach for developing other high-performance self-calibrated optical thermometers.

中文翻译：

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用于自校准光学测温的双发射 Eu2+/Eu3+ 共掺杂 Ca9Zn1.5(PO4)7 荧光粉

摘要 Ca9Zn1.5(PO4)7: Eu2+/Eu3+ 荧光粉已通过常规高温固相反应合成。基于 Eu2+ 离子 4f-5d 跃迁和 Eu3+ 离子 4f-4f 跃迁的不同热猝灭特性，Eu3+ 与 Eu2+ 的荧光强度比（FIR）在 293 至 473 K 的温度下表现出温度依赖性。最大绝对值Ca9Zn1.5(PO4)7: Eu 磷光体在 453 K 下分别达到 0.0034 K-1 和 1.4% K-1，当用作测温材料时，其相对温度敏感性和相对温度敏感性分别高达 0.0034 K-1 和 1.4% K-1。这些结果表明，我们的研究为开发其他高性能自校准光学温度计开辟了一条有效途径。