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J. Eur. Opt. Society-Rapid Publ. 22, 18( 2026)
Figure
4. Luminescence decay curves resulting from the 1 D 2? 3 H 4 transition in YAG: 1 % Pr powder, recorded after
annealing at different temperatures ranging from 1100 to 1600 ° C.
temperature experienced by the investigated material during an 2-hour treatment can be determined by analysis of specific emission intensity ratios and luminescence decay times. The results show that by examining the intensity ratio of the 3 P₀? 3 H 4( 488 nm) and 1 D 2? 3 H 4( 611 nm) transitions, temperature detection is possible in the range of 1300 – 1600 ° C with a sensitivity of 0.001 ± 7.49 10 �5 ° C �1. Furthermore, it was shown that thermal history can also be determined based on the excited-state lifetimes of Pr 3 + ions. Analysis of the luminescence decay time for the 1 D 2? 3 H 4 transition( k exc = 454.2 nm, k obs = 609.9 nm) revealed that temperature detection in the range of 1100 – 1600 ° C is achievable with a sensitivity of – 0.3785 ± 0.0137 ls. ° C �1. Although the lifetime-based approach enables temperature sensing over a broader temperature range,( 1100 – 1600 ° C), the FIR method provides higher sensitivity, as the intensity ratio of the 3 P₀? 3 H 4( 488 nm) and 1 D 2? 3 H 4( 611 nm) transitions changes more strongly with temperature than the 1 D 2? 3 H 4 luminescence decay time. It was also observed that as the temperature at which the powder had been held decreases, the material transforms into a multiphase structure( YAM? YAP? YAG). This structural evolution changes the symmetry of the local environment of Pr 3 + ions, resulting in reduced luminescence intensity and prolonged excited-state lifetimes. These correlations confirm that YAG: 1 % Pr 3 + is a promising material for luminescencebased recording and readout of thermal history in high-temperature processes.
Funding
Presented research results were carried out as part of the 7th edition of the Implementation Doctorate programme funded by the Polish Ministry of Science and Higher Education.
Conflicts of interest
The authors declare that they have no competing interests to report.
Figure 5. Measured lifetime of the 1 D 2 excited state of Pr 3 + ions in YAG: 1 % Pr powder as a function of annealing temperature.
The determined luminescence decay constants as a function of temperature are presented( Fig. 5).
A linear decrease in decay time with temperature allowed calibration from 1100 to 1600 ° C. Least-squares fitting gave a slope of �0.3785 ± 0.0137 ls /° C, defining the powder’ s temperature sensitivity.
4 Conclusions
In this article, the potential of YAG: 1 % Pr 3 + powder as a THS is presented. It was demonstrated that the maximum
Data availability statement Data will be available after request
Author contribution statement
Conceptualization, O. Bogucki, M. Kaczkan and A. Kozłowska.; Methodology, O. Bogucki.; Validation, O. Bogucki., M. Kaczkan. and A. Kozłowska.; Formal Analysis, O. Bogucki.; sample synthesis A. Pantoł-Boczon.; Investigation, O. Bogucki.; Resources, O. Bogucki.; Data Curation, O. Bogucki.; Writing – Review & Editing, O. Bogucki.; Supervision, M. Kaczkan. and A. Kozłowska
References
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