高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (1): 21.

• 研究简报 • 上一篇    下一篇

铕离子探针研究Al2O3的相变过程

刘兵, 杨频, 韩高义   

  1. 山西大学分子科学研究所, 太原, 030006
  • 收稿日期:1996-01-22 出版日期:1997-01-24 发布日期:1997-01-24
  • 通讯作者: 杨频.
  • 作者简介:刘兵, 男, 32岁, 硕士, 讲师.
  • 基金资助:

    中国科学院长春应用化学研究所稀土化学与物理开放实验室及山西省自然科学基金

The Phase Transition in Alumina Studied by Eu3+ Ion Probe

LIU Bing, YANG Pin, HAN Gao-Yi   

  1. Institute of Molecular Science, Shanxi University, Taiyuan, 030006
  • Received:1996-01-22 Online:1997-01-24 Published:1997-01-24

关键词: 结构相变, 离子探针, 荧光光谱

Abstract: Because of industrial interest, techniques to prepare a thermally stabilized active alumina have been developed.Ionic probe has been widely used in the studying of structure and function on biomacromolecules.In this paper, the phase transition in alumina at differ-ent sintering temperatures was first studied by Eu3+ ion fluorescent probe.The XRD, FTIRand fluorescence spectra measurements show that γ-phase is dominated in alumina at below 1000℃; the mixed γ-and phases in the sample are produced at 1100 ℃;but α-phase in alumina is dominated at 1200 ℃.It is shown in FTIRspectra that the peak of Eu-Ostretching vibration increases dramatically at 1200 ℃ Meanwhile, fluorescence spectra in-dicate that the peak of 613 nm is weakned gradually whereas the peak of 617 nm is strength-ened in5D0-7F2 supersensitive transition of Eu3+ when the sintering temperature increases.However, the peak of 5D0-7F4 transition splits evidently at 1200 ℃ because of the decreasing of symmetry in Eu3+ coordination site.

Key words: Phase transition in alumina, Eu3+ ion probe, Fluorescence spectra

TrendMD: