Sr_2ZnSi_2O_7∶Eu^(3+)的低温合成与发光性能

Low-temperature Synthesis and Luminescent Properties of Sr_2ZnSi_2O_7∶ Eu^(3+)

以介孔二氧化硅MCM-41为硅源,采用低温水热反应与后续煅烧相结合的方法合成Sr2-xZnSi2O7∶xEu3+红色荧光粉。实验结果表明,150℃水热处理16 h后的反应产物含Sr2ZnSi2O7相,经后续950℃煅烧3h得到Sr2ZnSi2O7纯相。在392 nm近紫外光的有效激发下,Sr2-xZnSi2O7∶xEu3+荧光粉显示Eu3+离子的特征跃迁发射,以615 nm的5D0→7F2跃迁发射峰为最强。适量Eu3+的掺杂对Sr2ZnSi2O7相结构几乎没有影响,当Eu3+离子的掺杂量x=0.10时,荧光粉发光强度最大。

Sr2- xZnSi2O7∶ xEu3 +red phosphors were synthesized with mesoporous MCM-41 as silica source via a low-temperature hydrothermal route with further calcining. The results indicate that Sr2ZnSi2O7 phase appears in the hydrothermal reaction product synthesized at 150 ℃ for 16 h,and pure phase Sr2ZnSi2O7 is obtained by further calcining at 950 ℃ for 3 h. Sr2- xZnSi2O7∶ xEu3 +phosphors can be effectively excited by 392 nm near-ultraviolet radiation and show the typical emission spectra of Eu3 +. The prominent emission transition is at 615 nm assigned to5D0→7F2. The structure of Sr2ZnSi2O7 is not affected by doping appropriate amounts of Eu3 +. Sr2- xZnSi2O7∶ xEu3 +phosphor with x = 0. 10 has the highest Eu3 +emission intensity.