| Autor: |
Wada, Noriyuki, Hanai, Jyoji, Furukawa, Mikiya, Kojima, Kazuo |
| Předmět: |
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| Zdroj: |
Journal of the American Ceramic Society; Aug2019, Vol. 102 Issue 8, p4621-4631, 11p, 1 Color Photograph, 8 Graphs |
| Abstrakt: |
To make a Mn2+‐doped red glass phosphor that can be excited with ultraviolet (UV) light of light‐emitting diodes (LEDs), 60P2O5‐35ZnO‐5Al2O3‐8MnO‐xCu2O glasses (x = 0‐1.00) were prepared by a melt‐quenching method at 1200‐1400°C for 30‐180 minutes in atmospheric air, and the redox of Mn and Cu as well as fluorescence properties were investigated. The Mn2+ ion was not reduced and oxidized in the melting, quenching, and annealing processes. The valence of Cu in the glasses changed in the order of 0, 1+, and 2+ with the increase in the amount of Cu2O and in the melting temperature and time. In this study, a 60P2O5‐35ZnO‐5Al2O3‐8MnO‐0.10Cu2O glass melted at 1250°C for 90 minutes, having the highest Cu+ concentration, showed the strongest Mn2+ red fluorescence under the UV light at 275 nm. This strong Mn2+ red fluorescence has been caused by the energy transfer from excited Cu+ ions to Mn2+ ions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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