Spherical YAG:Ce3+ Phosphor Particles Prepared by Spray Pyrolysis
来源期刊：JOURNAL OF RARE EARTHS2005年第4期
论文作者：Zhu Xianzhong Qi Faxin Wang Haibo
Key words：spray pyrolysis; YAG; white-LED; spherical phosphor particles; rare earths;
Abstract: Spherical YAG:Ce3+ phosphor particles with narrow size distribution were prepared by spray pyrolysis. The effects of the concentration of solution, the flow rate of carrier gas and the annealing temperature on the phosphor morphology were studied. The productivity of precursor particles shows a trend of drop after rising with the increase of concentration. Raising the flow rate of nitrogen can improve the productivity of the precursor particles. Phosphor prepared by spray pyrolysis has obviously higher emission intensity than that synthesized by solid state reaction, spray pyrolysis makes Ce3+ ions well distributed in the crystal lattice as the luminescent centers, and phosphor particles have regular sphericity and narrow size distribution.
Zhu Xianzhong1，Qi Faxin1，Wang Haibo1
(1.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China)
Abstract:Spherical YAG:Ce3+ phosphor particles with narrow size distribution were prepared by spray pyrolysis. The effects of the concentration of solution, the flow rate of carrier gas and the annealing temperature on the phosphor morphology were studied. The productivity of precursor particles shows a trend of drop after rising with the increase of concentration. Raising the flow rate of nitrogen can improve the productivity of the precursor particles. Phosphor prepared by spray pyrolysis has obviously higher emission intensity than that synthesized by solid state reaction, spray pyrolysis makes Ce3+ ions well distributed in the crystal lattice as the luminescent centers, and phosphor particles have regular sphericity and narrow size distribution.
Key words:spray pyrolysis; YAG; white-LED; spherical phosphor particles; rare earths;
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