摘要
采用高温烧结工艺制备了一系列铝酸锶铕体系的长余辉发光粉。其荧光光谱表明,铝锶比例对长余辉颜色有明显的影响。通过XRD分析,讨论了铝锶比例对发光粉基质结构的影响,并对发光颜色变化的原因作了进一步的解释。当铝锶比例达到5∶1时,荧光光谱只在410nm左右显示一个单峰,XRD分析表明,该发射峰是Eu2+在一基质结构──SrAl12O19中产生的,SrAl12O19∶Eu2+发光结构的长余辉特性亦得到验证。
Series of long decay afterglow powders of stron tium aluminum oxide system activated by Eu2+ were prepared by hype rthermal sintering techniques. It was found that the ratio of Al to Sr strongly affects the emission color, as observed by fluorescence spectra. Based on XRD analysis, the effect of the ratio of Al to Sr on the host structure was discusse d and an explanation on the color change was proposed. When the ratio of Al to S r is up to 5∶1, only one emission band peaked at around 410nm was observed in t he fluorescence spectrum. According to the XRD analysis, the blue emission was c onsidered to originate from a luminous structure SrAl12O19∶ Eu 2+.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2000年第6期632-634,共3页
Journal of Functional Materials
关键词
长余辉
发光结构
X射线衍射
long decay afterglow
luminous structure
XRD
