Preparation and Luminescence Property of Eu³⁺ Doped Lu₂SiO₅ Luminescent Powder

Eu³⁺ doped Lu₂SiO₅ (Lu₂SiO₅:Eu³⁺) powders were prepared by urea-assisted coprecipitation method and sol-gel method, respectively. The effects of calcination temperature on the phase composition and micromorphology of the powders and the effect of Eu³⁺ doping amount on the luminescent property of the powders were compared and analyzed. The results show that the Lu₂SiO₅ powders with a relatively high purity were obtained by both methods. The powder obtained by sol-gel method was composed of pure and single Lu₂SiO₅ phase, while the powder obtained by urea-assisted coprecipitation method contained a small amount of impurity phase of Lu₂O₃. The particle size of the powder obtained by sol-gel method was 200-300 nm, and the surface of the powder particle was rougher than that by urea-assisted coprecipitation method. The luminescence intensity of the Lu₂SiO₅:Eu³⁺ powders by the two methods was the largest when doped with 5mol% Eu³⁺, and that by sol-gel method was higher.