发光增强的红色荧光粉Li6Zr2O7:Eu3 的微波固相合成

microwave solid phase synthesis of Li6Zr2O7:Eu3 fluorescent powder with luminescence enhancement

摘要:

采用微波固相烧结方法合成系列红色荧光粉Li6Zr2O7:Eu3 。用XRD和荧光光度计对样品的组成和发光性能进行表征。考察了烧结时间，烧结温度，Eu3 用量对荧光粉发光性能的影响。研究结果表明，合成的Li6Zr2O7:Eu3 为一纯相。根据离子电负性标度，Eu3 （1.433）会优先取代电负性相近Zr4 的位置（1.610）。当烧结时间为10min，烧结温度为500℃，Eu3 用量为1.12mmol时,制备得的Li6Zr2O7:1.12Eu3 荧光粉用465nm激发在615nm处产生最强的红光发射，且发射光谱在615nm的强度是激发光谱在465nm强度的2.9倍。此时荧光粉色坐标为X=0.65，Y=0.35，具有很高的色纯度。在蓝光激发的白光LED中具有潜在应用前景。

Abstract:

Abstract:A series of red phosphor Li6Zr2O7:Eu3 was synthesized by microwave solid phase sintering.The composition and luminescence properties of the samples were characterized by XRD and fluorescence photometer.The effects of sintering time, sintering temperature and Eu3 dosage on luminescence properties of fluorescent powder were investigated.The results show that the Li6Zr2O7: Eu3 is as a pure phase.According to ionic electronegativity，leading to the place of by Eu3 （1.433） will take precedence over the positisn of Zr4 (1.610) with similar electronegativity. When the sintering time is 10min, the sintering temperature is 500℃, the dosage of Eu3 is 1.12mmol, the prepared Li6Zr2O7:1.12Eu3 fluorescent powder was excited at 465nm to generate the strongest red emission at 615nm,the intensity of the emission spectrum at 615nm is 2.9 times that of excitation spectrum at 465nm. at this point,the fluorescence pink coordinate is X=0.65, Y=0.35, it has high color purity. There are potential application prospects in white LED excited by blue light.