彩色PDP荧光粉的发展现状与制备方法

介绍了彩色PDP荧光粉的发展现状,总结出目前应用比较广泛的彩色PDP荧光粉中,存在红色荧光粉((Y,Gd)BO3:Eu3+)色纯度不高、蓝色荧光粉(BaMgAl10O17:Eu2+)的热稳定性差、绿色荧光粉(Zn2SiO4:Mn2+)的余辉时间偏长等缺点.通过对高温固相法、溶胶-凝胶法、燃烧法、共沉淀法、微波热效应法、水热法、喷雾热解法、激光加热基座法等彩色PDP荧光粉的制备方法及各方法的优缺点的探讨,提出了相应的改进策略,并探讨了将纳米技术应用在荧光粉制备过程中的发展前景.     

PDP用稀土荧光粉合成研究进展

简要介绍彩色PDP工作原理的基础上，阐述了现有PDP用荧光粉现状；同时，分别对高温固相反应法、溶胶—凝胶法、化学共沉淀法、微波热效应法、燃烧合成法以及喷雾热解法的国内外PDP用荧光粉合成研究进展作了介绍。     

PDP用铝酸盐基质蓝色BAM荧光粉的研究现状

介绍了PDP用铝酸盐基质蓝色荧光粉的发展现状，指出了BAM蓝粉存在的问题．分析了其劣化机理，并展望了PDP用铝酸盐蓝色荧光粉的前景。     

Y2O3:Eu荧光粉的制备方法及性质研究进展

本文报道了近年来人们用来制备Y2O3:Eu粉末的多种方法(高温固相合成、微波热合成、溶胶-凝胶技术、共沉淀法、燃烧法、喷雾干燥法、高分子凝胶包膜法),并对各种合成方法所得产品的粒径、激发与发射光谱以及粉末的发光亮度做了分析和比较,同时对各种方法的特点进行了归纳和总结.     

国内PDP用绿色荧光粉的研究进展

简要介绍了目前国内等离子体显示器（PDP）用绿色荧光粉的研究现状及合成研究进展，并展望了其发展前景。     

PDP用荧光粉发展现状与趋势

<正>PDP发展现状和趋势PDP的全称是Plasma Display Panel,中文叫等离子显示器,它是在两张超薄的玻璃板之间注入混合气体,并施加电压利用荧光粉发光成像的设备。因其可以挂在墙上,因而又称之为壁挂式显示器。它较之普通的显示器有其独特的优点,例如:     

溶胶-凝胶法制备的BaMgAl10O17:Eu2+荧光性能研究

研究了柠檬酸为络合剂的溶胶-凝胶法制备的BaMgAl10O17Eu2+蓝色荧光粉的荧光性能,考察了Eu 2+掺杂量和晶化温度等因素对荧光粉的紫外和真空紫外波段激发的荧光性能的影响,并通过X射线衍射分析,探讨了Eu2+掺杂量引起的晶胞参数和荧光粉发射波长的变化.结果表明BaMgAl10O17Eu2+随着Eu2+掺杂量的增加,除荧光强度发生变化外,发射光谱的波长发生红移;真空紫外波段激发,Eu2+的最佳添加量为0.1,紫外波段激发下为0.12,发射峰波长均为450 nm;晶化时间2小时,温度在1300℃以上更好.     

Y_2O_3∶Eu荧光粉的制备方法及性质研究进展

本文报道了近年来人们用来制备 Y2 O3∶ Eu粉末的多种方法 (高温固相合成、微波热合成、溶胶 -凝胶技术、共沉淀法、燃烧法、喷雾干燥法、高分子凝胶包膜法 ) ,并对各种合成方法所得产品的粒径、激发与发射光谱以及粉末的发光亮度做了分析和比较 ,同时对各种方法的特点进行了归纳和总结     

New red phosphor （Y, Gd, Lu）BO3： Eu^3＋ for PDP applications

Highly efficient phosphors under vacuum ultraviolet excitation are still demanded for the development of plasma display panels and Hg-free fluorescent lamps. The phosphors of Eu3+ doped (Y, Gd, Lu)BO3 were synthesized with solid state reaction method and the con-tents of Y3+, Gd3+, and Lu3+ for plasma display panel red phosphor were optimized under vacuum ultraviolet excitation. Two new potential candidates, which were (Y1-S-7TGdSLuT)BO3: Eu3+ (0相似文献   

超声波-沉淀法制备PDP小颗粒蓝粉及其粉体ζ电位的测试

采用超声波-沉淀法制备PDP小颗粒蓝色荧光粉BaMgAl10O17:0.1Eu,实验最佳条件为:前驱液PH=8～9,热预温度为650℃,灼烧温度1370℃,超声波作用时间为2h.产物经粉晶衍射仪检测为BaMgAl10O17,其厚度约为80nm的六方晶颗粒,平均粒度为360nm的小颗粒蓝色荧光粉,相对发光强度有明显提高.实验通过在制备样品的分散介质中加适量硝酸来调节样品表面的ζ电位,其样品原来ζ电位的负值可调控为正值,可以改善蓝粉在后续PDP涂屏工艺浆料中的流变行为,有利于提高PDP制屏的质量.     

Vacuum Ultraviolet Spectral Investigations on Green-Emitting Ca(La,Gd)4Si3O13:Tb3+ Phosphors for PDP Applications

In an effort to develop new green-emitting PDP phosphors with high efficiency, investigated were the synthesis, VUV photoluminescence (PL) spectra, optical properties, and chromaticity of Ca(La1-x-yTbxGdy)4Si3O13 phosphors by using synchrotron radiation. Upon analysis of the VUV spectroscopic and chromaticity investigations on the new green-emitting VUV phosphors, were an optimized composition achieved. The PLE spectral studies show that Ca(La1-x-yTbxGdy)4Si3O13 exhibit significant absorption in the VUV range. The VUV PL intensity was found to enhance with Gd3 -doping. Furthermore, the 1931 CIE chromaticity coordinates of Ca(La,Gd)4Si3O13:Tb were found to be (0.286, 0.548), as compared to (0.230, 0.712) for Zn2SiO4:Mn2 as a reference. The potential application of Ca(La,Gd)4Si3O13:Tb as a new green-emitting PDP phosphor are being currently improving and evaluating.     

New Green Phosphors Ba（1-x）SrxZr（BO3）2 Doped with Tb^3＋ for PDP Applications

Thephosphorsusedinplasmadisplaypanel(PDP)deviceshouldemitvisiblelightundervacuum ultraviolet(VUV)excitationof147nmand or172nm fromXe Hegasplasma[1].Recentlylotsoftraditional lampphosphorshavebeenusedascommercialphos phorsforPDP.However,thesematerialsstill…     

PDP用BaMgAl10O17:Eu2+蓝色荧光粉的研究进展

概述了Eu2 激活的钡镁多铝酸盐(BaMgAl10O17:Eu2 ,BAM)蓝色荧光粉在等离子显示领域中的研究现状;简要介绍了BAM的晶体结构,目前几种BAM的合成方法,并展望了PDP用蓝色荧光粉的研究方向.     

Luminescent properties of YVO4·xTa2O5:Eu3+

The samples of YVO4·xTa2O5:Eu3+(x=0.45,0.35,0.25,0.15,0.05)were synthesized by the conventional solid state reaction.The structure of the prepared sample was checked by the X-ray diffraction.XRD measurements at room temperature were confirmed that the prepared YVO4·xTa2O5:Eu3+ consisted of two phases。One phase was YVO4,which is tetragonal according with the JCPDS-Card(17-0341);the other phase was YTaO4,which is according with the JCPDS-Card(72-2018).The spectrum property of the sample was studied under the VUV.The effects of Ta doped on the luminescent properties of sample were investigated and it was found that some Ta doped could highlight the absorption of matrix in VUV region.The emission spectrum was dominated by the red peaks at 613 and 619 nm due to the electric dipole transition 5D0→7F2 of Eu3+.It indicated that Eu3+ occupied a site lacking inversion symmetry.There was one band peaked at 155 nm in the excitation spectrum of the sample,it could be assigned to the absorption of the host.     

PMMA with Long-Persistent Phosphors and Its Behavior of Luminescence

A new kind of rare earth material with high efficient long-persistent phosphors, such as SrAl2O4:Eu, Dy, has been developed in recent years. The PMMA with long-persistent phosphors is typical one of applications for the phosphors. In this work, we try to probe into the affection of the manufacture process on the PMMA with long-persistent phosphors, to analyze its performance, and its luminescence behavior, especially to study the self-excitation of the PMMA with long-persistent phosphors.     

高压预处理对合成硫氧化物X射线发光材料的影响研究

采用陶瓷工艺学原理，对混合好的配合料进行高压预处理，合成了Gd2O2S：nX射线荧光粉，并研究高压预处理对合成硫氧化物X射线发光材料Gd2O2S：Tb发光性能和物理特性的影响。对其进行光致发光(PL)谱、X射线激发发光(XEL)光谱、XRD、SEM研究。结果发现，高压预处理能有效降低合成温度，减小颗粒尺寸，并影响其颗粒分布及颗粒形貌，并使光致发光(PL)和X射线激发(XEL)发光强度有较大幅度的提高。由于比较致密，减少了碱金属离子和硫化物气氛的挥发，减轻对耐火材料和坩埚材料腐蚀程度。     

Investigations on Valence-Change Behaviors of Europium Ions in Eu-Doped Aluminate and Silicate Phosphors

Compounds of Sr3Al2O6∶Eu, Sr4Al14O25∶Eu, and BaZnSiO4∶Eu were synthesized by high-temperature solid state reactions. The doping Eu3 ions were partially reduced to Eu2 in Sr4Al14O25∶Eu and BaZnSiO4∶Eu prepared in an oxidizing atmosphere, N2 O2. However, such an abnormal reduction process could not be performed in Sr3Al2O6∶Eu, which was also prepared in an atmosphere of N2 O2. Moreover, even though Sr3Al2O6∶Eu was synthesized in a reducing condition CO, only part of the Eu3 ions was reduced to Eu2 . The existence of trivalent and divalent europium ions was confirmed by photoluminescent spectra. The different valence-change behaviors of europium ions in the hosts were attributed to the difference in host crystal structures. The higher the crystal structure stiffness, the easier the reduction process from Eu3 to Eu2 .