Influence Of Doping With Different Rare Earth Elements On Luminescence Properties Of Eu³⁺:GGG Powder

La,Eu:GGG,Y,Eu:GGG,Sm,Eu:GGG luminescent powders were prepared by citricacid combustion method and ammonia co-precipitation method,which La₂O₃,Y₂O₃,Gd₂O₃,Ga₂O₃,Eu₂O₃ and Sm₂O₃ were used as main raw materials.The samples were characterized by IR,XRD,SEM and fluorescence spectrum tests.The XRD tests show that the best calcination temperature is 900 °Cwhich the GGG phase was obtained by citric acid combustion method and ammonia co-precipitation method?Y,Eu:GGG luminescent powders were prepared by co-precipitation method the best calcination temperature is 800 °C?.It can be seen from the SEM photos that the sampleswithout calcined agglomerate seriously,but after calcined the samples are uniform in size and well dispersive.The analysis of fluorescence spectrum tests indicates that the fluorescence emission of the RE³⁺?RE=La,Sm,Y?,Eu³⁺:GGG luminescent powders have a main emission peak centered at 592 nm and 610 nm.The 592 nm corresponds to 5D0-7F1 magnetic dipole transition.The 610 nm corresponds to 5D0-7F2 electric dipole transition.They both belong to Eu³⁺ emission peak,but mostly on 592 nm.The La³⁺and Y³⁺ doped in the samples have a sensitization effect to Eu³⁺ fluorescence emission and can quenching increase the luminescent intensity of the two main emission peaks.The Sm³⁺ has an effect to Eu³⁺ fluorescence and reduces the luminescent intensity of the two main emission peaks of the samples.