【摘要】 固相法制备了碱土金属铝酸盐荧光粉CaAl12O19∶Eu,Mn,测试了样品的XRD及激发与发射光谱,对样品的结构及其发光性能进行了分析,并且考察了灼烧温度及Eu3+的浓度对样品发光性能的影响,对Eu3+的作用机理进行了探讨。该荧光粉能被波长短于550nm的蓝绿光以及紫外和近紫外光激发,其发射光谱峰值在590,615,645,657nm,其中前两个为Eu3+的特征发射,后两个为Mn4+的2E-4A2跃迁发射。该荧光粉的最佳烧结温度与时间分别为1550℃和4h,Eu3+的最佳掺杂摩尔分数为0.11%左右。更多还原

【Abstract】 Alkaline-earth metal aluminate phosphor CaAl12O19∶Eu,Mn was synthesized by solid reaction method.The structure,excitation and emission spectra of samples of phosphors were analyzed by XRD and F-4500,the influence of the calcination temperature and the concentration of Eu3+ on the luminescent performance of samples was observed.The influence mechanism of Eu3+ was studied.The results showed that the phosphors can be excited by the ultraviolet,near-ultraviolet,blue and green light below 550 nm,the emission peaks are at 590,615,645,657 nm,the peaks 590,615 nm are the characteristic emission of Eu3+,the another two peaks are the 2E-4A2 transition emission of Mn4+.The experiments showed that the optimal calcination temperature and time are 1 550 ℃ and 4 h,respectively,the optimal mol fraction of Eu3+ is 0.11%.更多还原