高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (1): 11.

• 研究论文 • 上一篇    下一篇

喷雾热解法制备YBO3:Eu球形发光粉

王列松, 林君, 周永慧   

  1. 中国科学院长春应用化学研究所稀土化学与物理重点实验室, 长春 130022
  • 收稿日期:2003-04-24 出版日期:2004-01-24 发布日期:2004-01-24
  • 通讯作者: 林　君(1966年出生),男,研究员,博士生导师,主要从事发光材料研究.E-mail:jlin@ns.ciac.jl.cn E-mail:jlin@ns.ciac.jl.cn
  • 基金资助:

    国家自然科学基金(批准号:20271048);国家重点基础研究发展计划(批准号:2003CB314707)资助

Synthesis of Spherical YBO3∶Eu Phosphors by Spray Pyrolysis Method

WANG Lie-Song, LIN Jun, ZHOU Yong-Hui   

  1. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2003-04-24 Online:2004-01-24 Published:2004-01-24

PDF (PC)

摘要： 用喷雾热解两段法制备了YBO3∶Eu荧光粉.其粒径分布窄(1～2μm),为规则的球形,且在高温下不会团聚.考察了PEG浓度(聚乙二醇,分子量为10000)对发光粉形貌和发光强度的影响、温度对结晶性和发光强度的影响、前躯体溶液的浓度对粒径大小的影响以及掺杂浓度对发光强度的影响.当PEG的浓度为0.004mol/L时,得到实心球形的发光粉,PEG的浓度过高或过低都会使小球产生破裂和空心,从而降低发光粉的发光强度;样品在700℃时开始结晶,1100℃时结晶性最好,相应的发光强度也最强;通过改变前驱体溶液的浓度,可以很容易地调控发光粉小球的粒径,控制前驱体溶液的浓度在0.07mol/L,可以得到粒径为1～2μm的球形发光粉;Eu3+在YBO3基质中的最佳掺杂摩尔分数为10%.

关键词: 发光, 喷雾热解, 球形发光粉, 硼酸钇, 铕

Abstract: Non-aggregated and spherical YBO3∶Eu phosphor particles with a narrow size distribution(1—2 μm) were first prepared by a two-step spray pyrolysis process. The effects of PEG concentration on the phosphor morphology and emission intensity, the annealing temperature on the crystallinity, the precursor concentration on the particle size and the doping concentration of Eu3+ on the emission intensity were investigated, respectively. The phosphor particle size can be controlled by changing the concentrations of precursor and PEG. Solid and spherical phosphor particles with a size of 1—2 μm were obtained with a certain precursor concentration (0.07 mol/L) and PEG concentration (0.04 mol/L), and the aggregation between particles did not appear even after annealing at a high temperature. Higher or lower concentration of PEG makes the phosphor particles broken or hollow, which will low the emission intensity. The results of XRD indicate that the powders begin to crystallize at 700 ℃ and completely crystallized at 1 100 ℃, and the optimum concentration for Eu3+ was determined to be 10%(molar fraction) of Y3+ in YBO3 host lattices.

Key words: Luminescence, Spray pyrolysis, Spherical phosphor, Yttrium borate, Europium

中图分类号: 

TrendMD: