论文部分内容阅读
采用共沉淀法合成CaO:Eu3+红色荧光粉,探讨了Eu3+离子的掺杂量、煅烧温度和煅烧时间对样品发光性能的影响,并利用X-射线衍射仪(XRD)、扫描电镜(SEM)和荧光光度仪(PL-PLE)等仪器对样品的性能进行表征。结果表明:掺杂Eu3+作为发光中心进入到CaO基质的晶格中,其最佳掺杂量为1.5%(摩尔含量);最佳煅烧温度和煅烧时间分别为1100℃和4h;样品的激发峰位于200~290nm之间,对应于Eu3+-O2-的电荷迁移跃迁(CTB),属于宽带激发;Eu3+离子主要占据严格对称的格位,其最大发射峰位于592nm,对应于5D0→7F1磁偶极跃迁,属于红色发光。
The effects of the doping amount of Eu3 + ion, the calcination temperature and the calcination time on the luminescence properties of the samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fluorescence spectrophotometer (PL-PLE) and other equipment to characterize the performance of the sample. The results show that the optimal doping amount of Eu3 + is 1.5% (molar content) in the lattice of CaO matrix. The optimum calcination temperature and calcination time are 1100 ℃ and 4h respectively. The excitation peak Located between 200 and 290 nm, corresponding to the charge transfer transition (CTB) of Eu3 + -O2-, which belongs to the broadband excitation. The Eu3 + ions mainly occupy a strictly symmetrical lattice with the maximum emission peak at 592 nm corresponding to the 5D0 → 7F1 magnetic dipole Transition, belongs to the red glow.