| Affiliation: | 1. Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
School of Material Science and Engineering, Kunming University of Science and Technology, Kunming, China;2. School of Material Science and Engineering, Kunming University of Science and Technology, Kunming, China;3. Department of Materials and Production, Aalborg University, Aalborg, Denmark;4. School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China;5. Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark |
| Abstract: | The transparent Er3+-Yb3+-doped fluoro-aluminosilicate glass-ceramic (GC) was prepared by melt-quenching. The crystal phase, morphology, and up-conversion (UC) luminescence of as-produced GC were characterized by X-ray diffraction, scanning electron microscopy, and fluorescence spectrophotometry, respectively. The results show that BaYF5 nanocrystals were uniformly distributed in the glass matrix of the as-produced GC. When the as-produced GC was subjected to heat treatment, the crystallinity was increased, but the crystal identity remains unchanged. Such heat-treatment doubled the intensity of the UC luminescence, and this enhancement was ascribed to the increased incorporation of both Er3+ and Yb3+ ions into the lower phonon energy environment of BaYF5 nanocrystals. Furthermore, the heat-treated GC was stable against further crystallization, and consequently its UC luminescence was stable at the application temperature. The heat-treated GC was found to possess an outstanding temperature-sensing capability. |
