摘要
采用溶胶凝胶-燃烧还原法在1100℃,p H 3~4的条件下制取了Eu^(2+)掺杂铝硅酸锶发光材料,通过TG-DTA、XRD和荧光光谱分析等方法,研究了材料的结构和发光性能,并对Eu^(2+)不同掺杂浓度下的发光性能进行了对比研究。结果表明,样品干凝胶的分解可以分为熔化、有机物的分解及Sr_2Al_2SiO_7∶Eu^(2+)晶相的生成三个阶段,1100℃所有反应完全;Sr_2Al_2SiO_7∶Eu^(2+)发光材料属于正方晶系晶体结构,其激发光谱是位于峰值344 nm^350nm的宽带谱,发射光谱峰值位于455 nm,最大发射光谱强度为7500 mcd;Eu2+掺杂浓度对其发光性能影响较大,在实验条件下掺杂摩尔浓度为0.04时激发光谱和发射光谱强度均达到最大。
Eu2＋doped Sr2A12SiO7 luminescent materials were prepared by sol- gel -combustion reduction method under the condition that the reaction temperature is 1100 ℃ and the pH is 3 to 4. The crystal structure and the luminescent properties of the samples were characterized and measured by using the method of TG - DTA, XRD and fluorescence analysis. , respec- tively. The results showed that Sr2A12 SiOT： Eu2＋ luminescence materials exhibited tetragonal system crystal structure, and its excitation spectra was a broadband spectrum located at 344 and 350 nm. The emission spectrum is located at 455 nm, the maximum luminous intensity is 7500 med; The Eu2＋ doped concentration had large effects on luminescent properties of the prepared material. The intensity of excitation and emission spectrum arrived at the maximum when doped molar concentration was 0.04.
出处
《稀土》
EI
CAS
CSCD
北大核心
2015年第6期57-61,共5页
Chinese Rare Earths
基金
国家自然科学基金项目(51474133)
国家重点基础研究发展(973)计划(2012CB720402)
关键词
燃烧法
溶胶凝胶
铝硅酸盐
长余辉发光材料
combustion method
sol - gel method
strontium aluminum silicate
luminescence
