BaMgAl10 O17 ：Mn^2＋ green phosphor was prepared by high temperature solid state reaction and the optimal chemical formula is Ba0.85MgMn0.15Al11.993 B0.007 O19. The influences of milling and ultrasonic-dispersal on t...BaMgAl10 O17 ：Mn^2＋ green phosphor was prepared by high temperature solid state reaction and the optimal chemical formula is Ba0.85MgMn0.15Al11.993 B0.007 O19. The influences of milling and ultrasonic-dispersal on the luminescent properties, granularity and appearance of the phosphor were investigated, and the green phosphor with fine grain and uniform dispersion to be adapted to plasma display panels was obtained. A Hitachi F-4500 fluorescence spectrophotometer was used to measure the luminescent performance of the phosphor, and the vacuum ultra violet （VUV） fluorescence spectroradiometric system （Zhejiang University Sensing Instruments Co. , Ltd. ） was used to measure the luminescent performance under 147 nm excitation. A scanning electron microscope （SEM） was used to identify the size and shape of the particles. X-ray diffraction （XRD） was used to confirm its crystalline structure. According to this study, the optimal after-treatment processes were as follows： milling time 5 min, milling medium 15 % C2 H5 OH, dispersal time 90 min and dispersal medium 15 % C2 Hs OH.展开更多
In order to prevent BaMgAl10O17∶Eu （BAM） phosphor from thermal degradation, MgF2-coatings on the surface of BAM were prepared by a sol-gel process. The coatings were characterized by X-ray photoelectron spectroscop...In order to prevent BaMgAl10O17∶Eu （BAM） phosphor from thermal degradation, MgF2-coatings on the surface of BAM were prepared by a sol-gel process. The coatings were characterized by X-ray photoelectron spectroscopy and scanning electron microscopy. The results indicate that BAM is successfully coated with homogenous, close MgF2 coatings. The photoluminescence and anti-thermal degradation properties of coated BAM were investigated under 254 and 147 nm excitations. The optimum anti-thermal degradation properties are obtained at the mass ratio of MgF2 to BAM 0.2% under 254 nm excitation and 0.5% under 147 nm excitation, respectively. It is considered that trace MgO formed after baked would cause different optimum coating thicknesses under 254 and 147 nm excitations.展开更多
基金This paper is supported by the Excellent Young Teachers Sponsored Program of CUG(No . CUGQNL0530) .
文摘BaMgAl10 O17 ：Mn^2＋ green phosphor was prepared by high temperature solid state reaction and the optimal chemical formula is Ba0.85MgMn0.15Al11.993 B0.007 O19. The influences of milling and ultrasonic-dispersal on the luminescent properties, granularity and appearance of the phosphor were investigated, and the green phosphor with fine grain and uniform dispersion to be adapted to plasma display panels was obtained. A Hitachi F-4500 fluorescence spectrophotometer was used to measure the luminescent performance of the phosphor, and the vacuum ultra violet （VUV） fluorescence spectroradiometric system （Zhejiang University Sensing Instruments Co. , Ltd. ） was used to measure the luminescent performance under 147 nm excitation. A scanning electron microscope （SEM） was used to identify the size and shape of the particles. X-ray diffraction （XRD） was used to confirm its crystalline structure. According to this study, the optimal after-treatment processes were as follows： milling time 5 min, milling medium 15 % C2 H5 OH, dispersal time 90 min and dispersal medium 15 % C2 Hs OH.
基金Project(50272026) supported by the NSFC Project(2003AA324020) supported by the Hi tech Research and Develop ment Program of China
文摘In order to prevent BaMgAl10O17∶Eu （BAM） phosphor from thermal degradation, MgF2-coatings on the surface of BAM were prepared by a sol-gel process. The coatings were characterized by X-ray photoelectron spectroscopy and scanning electron microscopy. The results indicate that BAM is successfully coated with homogenous, close MgF2 coatings. The photoluminescence and anti-thermal degradation properties of coated BAM were investigated under 254 and 147 nm excitations. The optimum anti-thermal degradation properties are obtained at the mass ratio of MgF2 to BAM 0.2% under 254 nm excitation and 0.5% under 147 nm excitation, respectively. It is considered that trace MgO formed after baked would cause different optimum coating thicknesses under 254 and 147 nm excitations.
