Three-color upconversion luminescence of rare earth codoped oxyhalide tellurite glasses

The red, green, and blue upconversion properties of Er^3＋/Tm^3＋/Yb^3＋-codoped oxyhalide tellurite glasses were studied under 980 nm LD excitation. The intense red （657 nm）, green （530 and 545 nm）, and blue （476 nm） emissions were simultaneously observed at room temperature. The results showed that the mixed halide modified tellurite glass （TZFCB） had strong upconversion emissions. The effect of halide on upconversion intensity was observed and discussed, and possible upconversion mechanisms were evaluated. The intense red, green, and blue upconversion luminescence of Er^3＋/Tm^3＋/Yb^3＋-codoped oxyhalide tellurite glasses might be a potentially useful material for developing three-dimensional displays applications.     

三维立体显示用 Yb~(3+)/Ho~(3+)/Tm~(3+)掺杂铝硅酸盐微晶玻璃(英文)

制备了一种Ho3+/Tm3+/Yb3+共掺铝硅酸盐微晶玻璃。研究了玻璃基质的吸收光谱和上转换发光光谱,分析了上转换发光机制。发现:在975nmLD激发下,可同时观察到明显的蓝光(476nm)、绿光(544nm)和红光(656nm)上转换发光。同未热处理的玻璃相比,处理后的微晶玻璃的蓝光、绿光和红光的发光强度分别增加了41.1、7.0和0.6倍。比对色坐标发现:微晶玻璃的色坐标CIE-x=0.520,CIE-y=0.360,而未热处理玻璃的色坐标CIE-x=0.284,CIE-y=0.327。上转换发光基质分析表明,上转换蓝光是Tm3+的三光子吸收过程,上转换绿光和红光是Ho3+的双光子吸收过程。这一系列的结果表明,Ho3+/Tm3+/Yb3+共掺铝硅酸盐玻璃可能对三维立体显示的潜在应用有所帮助。     

Effect of fluxes on structure and luminescence properties of Y3Al5O12：Ce^3＋ phosphors

Ce3+-activated yttrium aluminum garnet (YAG) was prepared by the solid-state reaction, in which H3BO3, LiF, NaF, KF and BaF2 were used as the fluxes. The effect of fluxes on optical properties of phosphors was studied in detail, especially the fluxes of alkali fluorides, which could enhance the emission intensity and change the wavelength of emission peaks. Among these YAG:Ce phosphors, the phosphor sintered with H3BO3 and NaF exhibited the strongest emission. The emission peaks of phosphors prepared with fluxes from LiF to KF were shifted to long wavelength. The effect of NaF concentration on the emission intensity of YAG:Ce was also investigated. The value of emis-sion intensity reached the maximum when the concentration of NaF was 0.5%.     

丙烷脱氢装置含硫废碱液处理技术的开发及工业应用

介绍了丙烷脱氢装置含硫废碱液处理技术的开发及工业应用情况。开发了以湿式氧化技术为核心的“加碱中和-湿式氧化-酸化中和”处理技术，工业化装置运行稳定，出水S2-质量浓度小于1 mg/L、COD小于200 mg/L，达到设计要求。截至目前，已建成多套此类废碱液湿式氧化处理装置，社会效益和经济效益显著。     

Ho3+/Yb3+共掺的氧氟硅酸盐微晶玻璃上转换发光

制备了Ho3+/Yb3+共掺的氧氟硅酸盐玻璃,根据玻璃样品的差热分析(DTA)进行微晶化处理,测试了Ho3+/Yb3+共掺微晶玻璃的X射线衍射(XRD)图谱、透射电镜(TEM)谱、吸收光谱和上转换发光光谱.根据Scherrer公式计算了CaF2微晶的平均晶粒尺寸,并与TEM谱进行比对;利用晶体生长动力学理论研究了纳米CaF2晶粒的生长特性,获得纳米CaF2晶体生长动力学方程;研究了.微晶玻璃中Ho3+离子的上转换发光特性;分析了微晶玻璃上转换发光机制.研究结果表明氧氟硅酸盐微晶玻璃是一种良好的上转换基质材料.     

湿式氧化碱渣处理装置的若干问题

介绍了缓和湿式空气氧化法碱渣处理装置反应器的设计和运转原理 ,对碱渣中杂质含量对装置运转的影响、反应器的设计选型、设备材质的选择、反应操作条件的确定等问题进行了讨论     

Ho3+/Yb3+共掺的SiO2-Al2O3-BaO-BaF2微晶玻璃上转换发光研究

制备了Ho3+/Yb3+共掺的氧氟硅酸盐玻璃, 根据玻璃样品的差热分析进行微晶化处理, 测试了Ho3+/Yb3+共掺微晶玻璃的X射线衍射(XRD)图谱、吸收光谱和上转换发光光谱。结果发现, 在980 nm LD激发下, Ho3+/Yb3+共掺的含BaF2纳米晶的氧氟硅酸盐微晶玻璃可以同时观察到绿光(544 nm)和红光(656, 748 nm)上转换发光, 分别对应于Ho3+ 离子的5F4/5S2→5I8, 5F5→5I8和5F4/5S2→5I7能级跃迁, 与未热处理的玻璃样品相比, 微晶玻璃样品的绿光发光强度增强约347倍。研究结果表明含BaF2纳米晶的氧氟硅酸盐微晶玻璃是一种潜在的上转换基质材料。