| 非晶纳米发光材料(Y,Eu)2O3-SiO2发射光谱的分析研究 |
| |
| 引用本文： | 张卫全,张慰萍.非晶纳米发光材料(Y,Eu)2O3-SiO2发射光谱的分析研究[J].发光学报,1997,18(1):15-22. |
| |
| 作者姓名： | 张卫全 张慰萍 |
| |
| 作者单位： | 1. 中国科学技术大学物理系, 合肥230026;2. 中国科学院结构分析开放实验室, 合肥230026;3. 稀土材料化学及应用国家重点实验室, 北京100871 |
| |
| 摘 要： | EXAFS测定表明sol-gel方法制备的纳米非晶(Y,Eu)2O3-SiO2发光材料中,发光中心Eu3+的局域环境和晶态X2型Y2SiO5Eu中Eu3+离子的局域环境相似。以此结构为依据,用M. F. Reid的方案计算了晶场迭加模型中的能级参数及光谱强度参数,并得到了与实验结果基本一致的理论光谱图.
|
| 关 键 词： | 光谱 纳米非晶 Eu3+离子 |
| 收稿时间： | 1996-04-10 |
THE STUDY ON THE SPECTRA OF AMORPHOUS NANOMETER MATERIAL (Y,Eu)2O3-SiO2 |
| |
| Zhang Weiquan,Zhang Weiping,Duan Changkui,Xia Shangda.THE STUDY ON THE SPECTRA OF AMORPHOUS NANOMETER MATERIAL (Y,Eu)2O3-SiO2[J].Chinese Journal of Luminescence,1997,18(1):15-22. |
| |
| Authors: | Zhang Weiquan Zhang Weiping Duan Changkui Xia Shangda |
| |
| Institution: | 1. Department of Physics, University of Science and Technology of China, Hefei 230026;2. Structure Research Laboratory, Chinese Academy of Sciences, Hefei 230026;3. State Key Lab.of Rare Earth Materials Chemistry and Application, Beijing 100871 |
| |
| Abstract: | Several nanometer luminescent samples——crystal and amorphous——were prepared by sol-gel method. Their structure and optical spectra were measured. Extended X-ray absorption fine structure was used to determine the local environment of luminescent centres of Eu3+ in amorphous nanometer material Y2O3SiO2. It was shown that having the same average coordination number 6.4 and interatomic distances, the local structure of Eu3+ in amorphows nanometer Y2O3-SiO2 was similar to that of Eu3+ in X2 type crystal Y2-SiO5. According to the structure parameter of X2 type Y2SiO5, the crystal field parameter and intensity parameter were calculated using M. F. Reid''s model with qL=-0.3,αL=0.2(A3), and so the theoretical spectra of Eu3+ in Y2SiO5 were obtainted. Once the broadening for amorphous was considered, the calculated spectra agreed with the experimental results. |
| |
| Keywords: | spectrum nanometer amorphous Eu3+ ion |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《发光学报》浏览原始摘要信息 |
| 点击此处可从《发光学报》下载免费的PDF全文 |
|
