Abstract
The lanthanide-doped fluorescence intensity ratio (FIR) temperature measurement technology for detecting inaccessible objects has attracted the attention of many scholars. In fact, FIR technology can achieve high-precision and non-contact temperature measurement, which is widely used in the biomedical and industrial fields, among others. In this study, novel pyroxene-type CaScAlSiO 6 :Tb 3+ /Sm 3+ ceramics (CSAC) were synthesized using the traditional high-temperature solid-phase method, with the crystal structure, energy transfer mechanism, and optical behavior of the ceramics subsequently studied in detail. The use of 5 D 4 → 7 F 5 and 4 G 5/2 → 6 H 7/2 (I 544nm /I 602nm ) energy level transitions as an optical thermometer has great potential, with the maximum absolute and relative sensitivity of the sensor found to be 0.1403 K −1 and 1.65%K −1 , respectively. In addition, the material was cycled three times in the temperature range of 77–287 K and demonstrated a particularly high degree of credibility, with the luminous intensity having a particularly small effect on the temperature changes. Overall, the results indicate that the green-light-emitting CSAC:0.08Tb 3+ /0.01Sm 3+ ceramic has great potential for use in optical cryothermometers.
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