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A BaFBr:Eu2+ photoluminescence phosphor powder was synthesized by modified solid phase method using BaCO3, NH4F, NH4Br and EuF3 as precursors. The powder was obtained by treating BaCO3 (1 µmol), NH4F (0.5 µmol), NH4Br (0.5 µmol) and EuF3 (0.02 µmol) at 300 °C under argon atmosphere, followed by reduction at 800 °C under hydrogen atmosphere and then decarbonization at 600 °C, with F/Br ratio near 1...
Large-scale production of pure carbon spheres, with diameters from 50nm to 1μm, has been achieved via direct pyrolysis of a wide range of hydrocarbons, including styrene, toluene, benzene, hexane, cyclohexane and ethene, in the absence of catalyst. Specific systematic studies using styrene as the feedstock indicate that the sizes of the resulting of carbon nanospheres can be controlled quite well...
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