Search results for "Ba4Yb3F17"

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Ordering of fluorite-type phases in erbium-doped oxyfluoride glass ceramics

2018

In this study, novel transparent Er3+ doped glass ceramics were prepared from melt-quenched oxyfluoride glasses with general composition of Na2O-NaF-BaF2-YbF3-Al2O3-SiO2. The crystallization of fluorite (BaF2, BaF2-YbF3, NaF-BaF2-YbF3 and Na0.5-xYb0.5+xF2+2x) and distorted fluorite (rhombohedral Ba4Yb3F17 and tetragonal NaF-BaF2-YbF3) phases was analysed in glass ceramics with different BaF2 and YbF3 ratio. The phase composition and microstructure were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Intense red upconversion luminescence (UCL) was detected under near-infrared excitation resulting from three photon upconversion followed by cross-relaxation betw…

Materials scienceBa4Yb3F17Scanning electron microscopeGlass ceramicsNucleationMineralogy02 engineering and technology010402 general chemistry01 natural sciencesFluoritelaw.inventionTetragonal crystal systemlaw:NATURAL SCIENCES:Physics [Research Subject Categories]Materials ChemistryCrystallizationPhase transitionSite-selective spectroscopyDoping021001 nanoscience & nanotechnologyMicrostructurePhoton upconversion0104 chemical sciencesCrystallographyCeramics and Composites0210 nano-technologyUpconversionJournal of the European Ceramic Society

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