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In order to develop highly efficient upconversion (UC) material, Er 3+ -doped oxyfluoride glass ceramics containing BaYF 5 nano-crystals were fabricated for the first time. The randomly distributed BaYF 5 nano-particles with the size of nearly 25 nm precipitated from the glass matrix at about 700 °C, then tended to aggregate slightly with the increase of heating temperature,...
Er 3+ doped SiO 2 –CaF 2 transparent glass ceramic was prepared by sol–gel method. The microstructural evolution of the samples was studied with X-ray diffraction (XRD), transmission electron microscopy (TEM), and infrared spectra (IR). After heat-treatment at 900 °C, the Si–OH bonds and other organic groups were basically eliminated. The CaF 2 crystallites in the sample...
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