Abstract
The oxyfluoride glass ceramics (GCs) containing novel Na(Y1.5Na0.5)F6 (NYNF) nanocrystals: Bi3+/Eu3+ were successfully fabricated. The results of the transmission electron microscope (TEM) showed that NYNF nanocrystals (40–70 nm) are distributed in the glass matrix. Moreover, the luminescence properties of Bi3+/Eu3+ ions-doped NYNF GCs were tested and analyzed. The NYNF GCs exhibit strong emission at blue (412 nm, Bi3+) and red (613 nm, Eu3+) wavelengths when excited with near-ultraviolet (n-UV) light at 288 nm. The emission color can be adjusted from blue (0.1506, 0.0655) to violet (0.3535, 0.1929) by increasing the Eu3+ ion content. Notably, the sample exhibited significant temperature-sensing characteristics as calculated by fluorescence intensity ratio (FIR), with high relative sensitivity (1.731 % K−1) at 548 K. These findings demonstrate the potential application of NYNF: Bi3+/Eu3+ GCs in achieving tunable multicolor luminescence and noncontact temperature measurement.
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