J4 ›› 2011, Vol. 28 ›› Issue (2): 241-246.

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Investigation on LiB3O5 crystal and it's growing solutions using high temperature Raman spectroscopy

WANG Di1, WAN Song-Ming1,2, ZHANG Qing-Li1, SUN Dun-Lu1, YIN Shao-Tang1, YOU Jing-Lin2, WANG Yuan-Yuan2   

  1. 1 Anhui Provincial Key Laboratory of Photonic Devices and Materials,  Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 
    2 Shanghai Key Laboratory of Mordern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, China
  • Online:2011-03-03

Abstract:

Using the high micro-Raman spectroscopy, the micro-structures of non-linear optical LiB3O5 crystal and the high temperature solution were studied. The high temperature Raman spectra of LiB3O5 crystals, Raman spectra of lithium borate glasses Li2O•4B2O3 at room temperature and its melt at high temperature were obtained. The analysis of these spectra indicates that the micro-structures of LiB3O5 crystal and lithium borate glasses Li2O•4B2O3 are mainly the six-number boroxol rings containing one BØ4 tetrahedron (Ø represents bridge oxygen). With the temperature increasing, the stability of the BØ4 tetrahedron decrease and destroys, a conversion from 4- coordinated boron BØ4 to 3- coordinated boron BØ3 occurs. As a result, the six-number boroxol rings containing one BØ4 are partly destroyed and the concentration of the boroxol B3Ø6 in the high temperature solution increases. The structural characteristics of the high temperature Li2O•4B2O3 solution are benefit for LiB3O5 crystal growth.

Key words: materials, LB3O5 crystal, high temperature solution crystal growth, lithium borate glasses, high temperature Raman spectroscopy

CLC Number: