摘要
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 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.
基金
FundedbyKeyScientificandTechnologicalProjectofHubeiProvince(2 0 0 1AA10 2A0 3)
