Abstract
Oxyfluoride glass and glass ceramics codoped with Er3+/Yb3+ ions of the same composition were prepared. Nanocrystals in the glass ceramics were formed,characterized by xray diffraction and fluorescence spectra. The measurements by using the differential thermal analysis and the crystal parameter calculation by JuddOfelt theory indicated that the rareearth ions have entered the nanocrystals. At the same time, the ratio of the nanocrystalline phases in glass and glass ceramics before and after annealing was calculated respectively.
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