A wide temperature range dual-mode luminescence thermometer based on Pr3+-doped Ba(Zr0.16Mg0.28Ta0.56)O3 transparent ceramic

Abstract

Owing to the impact of robust thermal quenching, lanthanide-based luminescence thermometer operation can usually only be achieved within a comparatively small temperature scope (ambient temperature to 800 K). Here, this study presents a method for addressing the mentioned limits, and a luminescence thermometer with an ultra-wide temperature range has been achieved, which adopted Pr³⁺-doped Ba(Zr_0.16Mg_0.28Ta_0.56)O₃ transparent ceramic to be the optical temperature probe. Based on the high luminescence intensity and excellent thermal stability of the ³P₀–³F₂ hypersensitive transition of Pr³⁺ in Ba(Zr_0.16Mg_0.28Ta_0.56)O₃ transparent ceramic, the intensity ratio of the emissions at 624 nm and 649 nm was employed for temperature sensing in an ultra-wide range (293–873 K), and the maximal relative sensitivity reached 1.05% K⁻¹, outperforming most existing luminescence temperature measurement transparent ceramics. Furthermore, in Pr³⁺-doped Ba(Zr_0.16Mg_0.28Ta_0.56)O₃ transparent ceramic, the lifetime of the ³P₀–³H₄ transition also exhibits prominent optical thermometry performance (303–873 K). The results presented in this work may be of high significance for the design of novel ratiometric/lifetime dual-mode optical temperature sensors in the high-temperature measurement field.