凝胶-燃烧法合成YAG：Eu^3＋纳米荧光材料的结构和发光性能

Y3Al5O12:Eu nanophosphors were synthesized by a gel combustion method. The structure of phosphors was characterized by XRD and FTIR. YAG phase came to occur when YAG:Eu precursors were sintered at 800 ℃, although the phase was mainly amorphous. The organ

Y3AlO12:Eu nanophosphors were synthesized by a gel combustion method. The structure of phosphors was characterized by XRD and FFIR. YAG phase came to occur when YAG:Eu precursors were sintered at 800 degrees C, although the phase was mainly amorphous. The organic groups pyrolyzed completely and pure YAG phase was obtained in the samples sintered at 900 degrees C. In the formation of YAG phase, no intermediate phases such as YAP and YAM were detected. Both D-5(0) -> F-7(1), orange and D-5(0) -> F-7(2) red emission could be observed for all the sintered samples. However, the emission of amorphous samples was greatly different from that of crystalline ones. The former was mainly D-5(0) -> F-7(2), red emission, but the latter was D-5(0) -> F-7(1), orange emission. As sintering temperature rises, the ratio of orange to red for phosphors increases. Eu could be doped up to 8% in YAG host lattice, and fluorescence quenching was absent. It indicated that the gel combustion synthesis method can increase emission intensity and quenching concentration due to a good distribution of Eu3+ activators in Y3Al5O12 matrix.