铝酸锶铕的合成与发光的研究

铝酸锶铕的合成与发光的研究 STUDY ON SYNTHESIS AND LUMINESCENCE PROPERTY OF EUROPIUM-ACTIVATED STRONTIUM ALUMINATE 宋庆梅 Song Qingmei 1 first-author 黄锦斐 Huang Jinfei 1 吴茂钧 Wu Maojun 1 陈暨跃 Chen Jiyao 2 复旦大学材料科学研究所 复旦大学材料科学研究所 Institute of Material Science, Fudan University Institute of Material Science, Fudan University 复旦大学物理系 复旦大学物理系 Physics Department, Fudan University Physics Department, Fudan University 本文详细报导4(SrEu)O·7Al 2 O 3 .磷光体的合成及激活剂Eu 2+ 离子浓度、硼酸、五氧化二磷等对磷光体发光强度,发射光谱和激发光谱的影响.讨论了不同Eu 2+ 离子之间的能量传递.测量了不同Eu 2+ 浓度下磷光体的荧光寿命和长余辉特性. The synthesis of 4 (SrEu)O·7Al 2 O 3 phosphor and the effects of the concentration of activator Eu, contents of B 2 O 3 and P 2 O 5 on fluorescence property were investigated.The phosphors were prepared by solid state reaction of Al(OH) 3 , SrCO 3 , Eu 2 O 3 and H 3 BO 3 , firing in air at 1550℃ for 3hr followed by flowing in H 2 -N 2 at 1250℃ for 3hr.It was found that B 2 O 3 and P 2 O 5 influenced the luminescence brightness and emission spectra of the phosphor. The emission peak of phosphor shifted from 520nm to 490nm with adding H 3 BO 3 and (NH4) 2 HPO 4 in raw material. Meanwhile, the emission intensity was remarkably enhanced by adding (NH 4 )ZHPO 4 to starting material.The results show that adding P 2 O 5 to 4(Sr 1-x Eu x )0.7Al 2 O 3 leads to more effective energy transfer from 410 emititng center to 490nm one. The two bands might be originated from inequivalent Eu ions (Eu ions on different crystallographic sites)In addition to the fast decay of phosphor (τ~40-50μs), the long fluorescence aftergrow was also observed to last for a few hours. 1990-07-02 1991-05-30 2020-08-11 2 12