Abstract
Four different erbium compounds: Er 2O 3, ErOF, ErF 3 and ErCl 3, doped oxyfluoride glass ceramics were prepared. The microstructure and optical properties of the glasses and glass ceramics were determined by differential scanning calorimetry (DSC), X-ray diffraction (XRD), absorption spectra and luminescence spectra. The influence of four different Er 3+ compounds on the microstructure and optical properties of the glasses and their corresponding glass ceramics was analyzed in detail. The results indicated that upconversion luminescence and ratios of red to green emission of all the samples have close relationship with microstructures and the variety of the Er 3+ compounds. It was concluded that the glass ceramics doped with ErF 3 was the most beneficial for the precipitation of PbF 2 crystallites and had the lowest ratio of red to green emission. The mechanisms of the observed phenomena were discussed.
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