Publication Date:
2014-12-20
Description:
(Y 1− x Eu x ) 4 Al 2 O 9 solid solution powders can be easily prepared by a simple and convenient method, which effectively combined a molten salt process with a chemical co-precipitation technique. All the samples were characterized by XRD, SEM, and photoluminescence (PL) spectra techniques. The results show that the incorporation of NaCl salt can greatly promote the formation and crystallization of (Y 1− x Eu x ) 4 Al 2 O 9 crystallites, and lower their synthesizing temperature, and that their particle size and morphology strongly rely on x value, which finally dominates their PL properties. The prominent emission intensity of 5 D 0 7 F 2 transition rather than 5 D 0 7 F 1 indicates doped Eu 3+ cations occupy Y 3+ position in monoclinic Y 4 Al 2 O 9 , which is sensitive to Eu 3+ local environment, and at x = 0.10, there exist a maximum PL intensity due to the concentration quenching effect.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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