高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (6): 860.

• 研究简报 • 上一篇    下一篇

Mg:Fe:LiNbO3晶体光谱性能的研究

李铭华1, 赵业权1, 徐玉恒1, 刘彩霞1, 石东奇2, 吴仲康2   

  1. 1. 哈尔滨工业大学应用化学系, 哈尔滨 150006;
    2. 南开大学物理系
  • 收稿日期:1992-06-16 修回日期:1992-10-16 出版日期:1993-06-24 发布日期:1993-06-24
  • 通讯作者: 李铭华
  • 基金资助:

    国家自然科学基金

Studies on the Spectral Properties of Mg:Fe:LiNbO3 Crystal

LI Ming-Hua1, ZHAO Ye-Quan1, XU Yu-Heng1, LIU Cai-Xia1, SHI Dong-Qi2, WU Zhong-Kang2   

  1. 1. Department of Applied Chemistry, Harbin University of Technology, Harbin, 150006;
    2. Department of Physics, Nankai Unitvrsity, Tianjin
  • Received:1992-06-16 Revised:1992-10-16 Online:1993-06-24 Published:1993-06-24

关键词: Mg:Fe:LiNbO3, 晶体, 吸收光谱, 红外透射光谱

Abstract: Mg:Fe:LiNbO3 crystal sampls were prepared by melt-pulling method.Sample 1# was reduced in Li2CO3 powders at 500oC for 24 h and sample 2# was oxidized in Nb2O5 powders at 1000oCfor 20 h.The inclusion contents of MgOand Fe2Os are 5 mol% and 0.08 mol% respectively.The absorption spectra of Mg:Fe:LiNbO3, Fe:LiNbO3 and Mg:LiNbO3 crystals and the infrared transmission spectra of Mg:Fe:LiNbO3 crystal were measured.There is an absorption peak at 480 nm in Mg:Fe:LiNbO3 crystal, it is responed to Fe2+ absorption.There are two absorption peaks which lie at 500 nm and 1200 nm in Mg t LiNbO3 crystal, they are responed to oxide vacancy Fcenter (V02+ + 2e-) and Mg+ absorption, but the two absorption peaks in Mg:Fe:LiNbO3 crystal are very weak and even vanish, this is due to that after Fe ions entered the crystal, Fe3+ will trap the electrons which are excited by treating the samples at high temperature and reduced condition, the electrons can't combine with oxide vacancy V02+ and Mg2+ to produce Fcenter and Mg+, The infrared transmission spectra of sample 1# show two OH- absorption peaks at 2.83 μm and 2.85 μm, the absorption peak at 2.83 μm is stronger than that at 2.85 μm, the absorption peak at 2.83 μm is responed to the effect of Mg2+ on OH- lonely, the absorption peak at 2.85 μm is responsed to the effect of Fe ions replacing Nb5+ on OH- lonely or to the joint effect of Fe ions replacing Nb5+, and Mg2+ replacing Li+ on OH-, consequently make the OH- absorption red shift.It is concluded that Fe ions make the resistance of photorefraction decrease, but Mg ions make it increase.The joint effect of the two kinds of ions decides the photorefraction of the crystal.

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