In Situ Synthesis of β-Na<sub>1</sub>.<sub>5</sub>Y<sub>1</sub>.<sub>5</sub>F<sub>6</sub>: Er<sup>3+</sup> Crystals in Oxyfluoride Silicate Glass for Temperature Sensors and Their Spectral Conversion and Optical Thermometry Analysis
Transparent oxyfluoride glass-ceramics (GCs) with embedded β-Na<sub>1</sub>.<sub>5</sub>Y<sub>1</sub>.<sub>5</sub>F<sub>6</sub> crystals doped with Er<sup>3+</sup> ions were fabricated by a melt-quenching method with subsequent...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/c1273b26ce4d4e95a557b1b9554353d7 |
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| Sumario: | Transparent oxyfluoride glass-ceramics (GCs) with embedded β-Na<sub>1</sub>.<sub>5</sub>Y<sub>1</sub>.<sub>5</sub>F<sub>6</sub> crystals doped with Er<sup>3+</sup> ions were fabricated by a melt-quenching method with subsequent heat-treatment. The structural characterizations and spectroscopic techniques were performed to verify the precipitation of β-Na<sub>1</sub>.<sub>5</sub>Y<sub>1</sub>.<sub>5</sub>F<sub>6</sub> crystals and partition of the Er<sup>3+</sup> dopant into the crystals. Bright green up-conversion (UC) emission was achieved in Er<sup>3+</sup>-doped glass-ceramic (Er-GC). Furthermore, the temperature-dependent visible UC behavior based on thermally coupled energy levels (TCLs) and non-thermally coupled energy levels (NTCLs) was also examined in the temperature range 298 k to 823 K with maximum relative sensitivity (<i>S<sub>r</sub></i>) of 1.1% K<sup>−1</sup> at 298 K for TCLs in Er-G and Er-GC samples. |
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