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SiO2包覆量对SrAl2O4:Eu2+,Dy3+耐水性能的影响

发表时间:2013-02-15  浏览量:1149  下载量:308
全部作者: 杨峗,郝虎在
作者单位: 太原理工大学物理与光电工程学院
摘 要: 采用液相法在发光材料SrAl2O4:Eu2+,Dy3+表面包覆SiO2薄膜。采用酸度计、X射线粉末衍射仪、荧光分光光度计、照度计配合秒表分别对未包覆粉体与包覆粉体的耐水性能、X射线衍射(X-ray diffraction, XRD)图谱、发射和激发光谱、余辉性能进行表征。结果表明:包覆后样品的耐水性能显著提高,物相未发生改变,发射和激发光谱峰的位置未发生改变但相对强度降低,初始亮度和余辉时间略有降低。考虑耐水性能、光谱性能和余辉性能的要求,选取SiO2最佳包覆量为15%.
关 键 词: 凝聚态物理学;表面包覆;液相法;绿色长余辉材料;耐水性能
Title: Influences of SiO2 coating on water resistance of SrAl2O4:Eu2+,Dy3+
Author: YANG Yun, HAO Huzai
Organization: College of Physics and Optoelectronics, Taiyuan University of Technology
Abstract: Luminescent powder SrAl2O4:Eu2+,Dy3+ was coated by SiO2 through liquid-phase method. Digital acidity meter, X-ray powder diffractometer patterns, fluorescent spectrophotometer and brightness meter with stopwatch were employed to characterize the water resistance, X-ray diffraction (XRD) spectra, photoluminescence spectra, and after-glow property of the uncoated and coated samples, respectively. The results indicated that the coated samples had better water resistance, the crystalline phase was not changed, and the peak location of emission and excitation spectra was also not changed, but the relative intensity decreased. Furthermore, both the initial intensity and after-glow time decreased slightly. Considering the requirement of water resistance property, spectra property, and after-glow property, the best amount of SiO2 coated on the surface was 15%.
Key words: condensed matter physics;surface coated; liquid-phase method; green long after-glow material; water resisting
发表期数: 2013年2月第3期
引用格式: 杨峗,郝虎在. SiO2包覆量对SrAl2O4:Eu2+,Dy3+耐水性能的影响[J]. 中国科技论文在线精品论文,2013,6(3):234-238.
 
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