Synthesis and luminescence of nano fluorescent powder of Y4Al2O9: Eu3+ |
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Authors: | Yuan Xi-ming Xu Yong-sheng Yu Jiang-bo Wang Yong-qian Wang Hong-mei |
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Affiliation: | (1) Testing Center, China University of Geosciences, 430074 Wuhan, China |
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Abstract: | Nano fluorescent powder of Y4Al2O9: Eu3+ was synthesized by sol-gel method. The XRD shows that the product prepared at 900°C is pure-phase Y4Al2O9: Eu3+. The Y4Al2O9 powder is nano-size crystal testified by BF and ED analysis of TEM. The grain diameter of Y4Al2O9 is in the range between 20 and 50nm, and its average is 30 nm. The luminescent spectra show that Eu3+ ious occupy two kinds of sites in Y4Al2O9 crystal lattice. One is in the strict inversion center, and the other is in off lying inversion center. When excited with UV light (λ=254nm), Y4Al2O9: Eu3+ exhibits an orange emission bond at λ=590 nm due to the5Do→7F1 transition and a red emission band at λ=610 nm due to5Do→7F2 transition. YUAN Xi-ming: Born in 1951 Funded by Key Scientific and Technological Project of Hubei Province (2001 AA102A03) |
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Keywords: | rare-earth sol-gel method nano fluorescent powders synthesis Luminescence |
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