A series of Eu²⁺/Cr³⁺ co-doped BaAl₁₂O₁₉ phosphor was synthesized by traditional high temperature solid stated method, and the temperature-sensitive characteristic of the phosphor was researched. Due to the temperature sensitivity of the fluorescence lifetime of Cr³⁺, the thermometry based on fluorescence lifetime can be realized. Furthermore, the emissions of Eu²⁺ ion and Cr³⁺ ion can be well separated, which shows the excellent signal recognition ability of this phosphor. The Eu²⁺/Cr³⁺ co-doped BaAl₁₂O₁₉ phosphor can be used for the thermometry based on fluorescence intensity ratio. A dual-mode optical thermometry is proposed and researched in the temperature range of 293–563 K by using the decay lifetime of Cr³⁺ emission and in the temperature range of 295–476 K by using the fluorescence intensity ratio of Eu²⁺ to Cr³⁺as temperature readout. The maximum values of relative sensitivity are 0.466% K⁻¹ at 363 K and 0.259% K⁻¹ at 476 K. The Eu²⁺/Cr³⁺ co-doped BaAl₁₂O₁₉ phosphor has excellent optical temperature characteristic, and its dual-mode thermometry characteristics provide convenience for the application of this material. This phosphor has potential application prospects in the field of optical thermometry.

采用传统的高温固态法合成了一系列Eu ²⁺ / Cr ³⁺共掺杂BaAl ₁₂ O ₁₉荧光粉，研究了该荧光粉的温度敏感特性。由于Cr ³⁺荧光寿命的温度敏感性，因此可以实现基于荧光寿命的测温法。此外，可以很好地分离Eu ²⁺离子和Cr ³⁺离子的发射，这表明该荧光粉具有出色的信号识别能力。Eu ²⁺ / Cr ³⁺共掺杂BaAl ₁₂ O ₁₉荧光粉可根据荧光强度比用于测温。提出了一种双模光学测温法，并在293-563 K的温度范围内利用Cr ^3+的发射衰变寿命进行了研究，并在295-476 K的温度范围内利用Eu ²⁺与荧光的强度比进行了研究。 Cr ³⁺作为温度读数。相对灵敏度的最大值是0.466％K ^-1，在363 K和0.259％K ^-1，在476 K的铕²⁺ / Cr的³⁺共掺杂的BaAl ₁₂ ö ₁₉磷光体具有出色的光学温度特性，其双模测温特性为该材料的应用提供了方便。该荧光粉在光学测温领域具有潜在的应用前景。