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Nano fluorescent powder of Y 4Al 2O 9:Eu 3+ was synthesized by sol gel method.The XRD shows that the product prepared at 900℃ is pure phase Y 4Al 2O 9:Eu 3+ .The Y 4Al 2O 9 powder is nano size crystal testified by BF and ED analysis of TEM.The grain diameter of Y 4Al 2O 9 is in the range between 20 and 50nm,and its average is 30nm.The luminescent spectra show that Eu 3+ ious occupy two kinds of sites in Y 4Al 2O 9 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),Y 4Al 2O 9:Eu 3+ exhibits an orange emission band at λ=590nm due to the 5D 0→ 7F 1 transition and a red emission band at λ=610nm due to 5D 0→ 7F 2 transition.
Nano fluorescent powder of Y 4Al 2O 9: Eu 3+ was synthesized by sol gel method. The XRD shows that the product was prepared at 900 ° C. is pure phase Y 4Al 2O 9: Eu 3+. The Y 4Al 2O 9 powder is nano size crystal testified by BF and ED analysis of TEM. The grain diameter of Y 4Al 2O 9 is in the range between 20 and 50 nm, and its average is 30 nm. The luminescent spectra show that Eu 3+ ios occupy two kinds of sites in Y 4Al 2O 9 crystal lattice. One is in the strict inversion center, and the other is in off lying inversion center. Phenomenon excited with UV light (λ = 254nm), Y 4Al 2O 9: Eu 3+ exhibits an orange emission band at λ = 590 nm due to the 5D 0 → 7F 1 transition and a red emission band at λ = 610 nm due to 5D 0 → 7F 2 transition.