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.