摘要
在还原性气氛下采用高温固相法合成了适合近紫外(λex=375 nm)激发的光致发光蓝色荧光粉Sr2MgSi2O7:Eu2+,Zr4+,研究了NaF助熔剂对Sr2MgSi2O7:Eu2+,Zr4+荧光粉晶体结构、颗粒形貌及发光性能影响。结果表明:适量的NaF助熔剂有利于样品的晶化,所获得样品的颗粒形貌更加规整,能有效降低中间粒径(D50)并控制粒径分布;只含中间颗粒(D50)样品的发光强度高于含全颗粒样品的发光强度;NaF助熔剂最佳添加含量为6%(质量分数),可使样品的发光强度提高446%;掺杂适量的Zr4+有利于样品的发光强度的提高,最后探索NaF助熔剂及掺杂Zr4+离子提高发光性能的机制。
Sr2 MgSi2O7 ： Eu2＋ , Zr4＋ , a blue photolumi- nescence phosphor for being excited near ultraviolet （λex = 375 nm）, was synthesized by high-temperature solid state reaction under reducing atmosphere. The influence of flux on the crystal structure and particles morphology and luminescent properties was investiga- ted. The results indicated that the flux could help to crystallize, and improve the morphology of particles, and the particle size and size distribution were effec- tively controlled. The luminescent intensity of sample with only the median diameter were better than sample with all the particles. The optimum content of NaF was about 6% in mass which increased the relative lu- Eu2 ＋ , Zr4 ＋ minescent intensity of Sr2 MgSi2O7 ： sample more than 446%. The luminescent intensity of Sr2MgSi2O7： Eu2＋ phosphors could be improved re- markably by doping Zr4＋. The mechanization of NaF as flux and doping of Zr4＋ ion on enhancing the lumi- nescent intensity of the sample were investigated.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2012年第5期574-580,共7页
Journal of the Chinese Society of Rare Earths
基金
江西省科技厅相关项目(S00789
20112BDH80019)资助
