Nano fluorescent powder of Y4Al2O9:Eu3+ was synthesized by sol-gel method.The XRD shows that the product prepared at 900℃ 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 30nm.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 band at λ=590nm due to the 5D0→7F1 transition and a red emission band at λ=610nm due to 5D0→7F2 transition.
参考文献
| [1] | 于江波,袁曦明,陈敬中.纳米发光材料的研究现状及进展[J].材料导报,2001(01):30-32. |
| [2] | PALILLA F C;Levine A K;Tomkus M R .Fluorescence Properties of Alkaline Earth Aluminates of the Type MAl2O4 Activated by Divalent Europium[J].Journal of the Electrochemical Society,1968,115(06):642. |
| [3] | T Katusmata;T Nabae;K Sasajima et al.Effects of Composition on the Long Phosphorescent SrAl2O4:Eu2+ Dy3+ Phosphor Crystals[J].Journal of the Electrochemical Society,1997,144(09):243. |
| [4] | E Nakazawa;T Mcchida .Traps in SrAl2O4:Eu2+ Phosphor with Rare-earth Ion Doping[J].Journal of Luminescence,1997,72:236. |
| [5] | Allen M Alper.Phase Diagrams in Advanced Ceramics[M].Copyright by Academs Press Inc,1995 |
| [6] | Lingdong Sun;Chun hua Yan;Changhui Liu .Study of the Optical Properties of Eu3+-doped ZnS Nano Crystals[J].Journal of Alloys and Compounds,1998,275:234. |
| [7] | V. Babin;P. Fabeni;M. Nikl;G. P. Pazzi;I. Sildos;N. Zazubovich;S. Zazubovich .Polarized luminescence of CsPbBr_3 nanocrystals (quantum dots) in CsBr:Pb single crystal[J].Chemical Physics Letters,1999(1/2):31-36. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%