Potential of oxide glass-ceramics containing defect-fluorite nanocrystals as host matrix for rare-earth ions for efficient spectral conversion is investigated. The oxide glass-ceramics embedded with defect fluorite pyrochlore (Eu,Yb) 2 TiO 5 nanocrystals are prepared through melt-quenching and subsequent heat-treatment. It turns out that part of Eu 3+ and Yb 3+ ions are incorporated into the oxide nanocrystals, and Eu 3+ ions remained in the glassy phase are reduced into Eu 2+ ions. Blue emission from Eu 2+ ions, red emission from Eu 3+ ions, and near-infrared emission from Yb 3+ ions are generated and modulated by excitation wavelength. These features make oxide glass-ceramics containing defect-fluorite (Eu,Yb) 2 TiO 5 nanocrystals promising as host for rare-earth ions for efficient spectral conversion.
K E Y W O R D Sglass forming systems-annealing, glass manufacturing-glass, glass manufacturing-luminesence, optical properties, oxide glass-caramics
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