ゾル-ゲル法と溶融法で作製した二成分系チタンノリン酸塩ガラスの構造研究

概要

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The 70TiO_2・30P_2O_5 (mol%) glass was prepared by the sol-gel method. Its structure was examined by means of IR, Raman spectroscopy and X-ray radial distribution function analysis, and was compared with the corresponding melt-derived glass. It was found that average coordination number of Ti^<4+> ions was almost 6 and Ti^<4+> ions formed predominantly TiO_6 octahedra in the sol-gel-derived glass, while Ti^<4+> ions were present in the 4, 5 and/or 6-fold coordination states to give average coordination number in-between 4 and 5 in the melt-glass. The preference of high coordination state of Ti^<4+> ions in the sol-gel glass was consistent with higher refractive index and density than the melt-glass.
2004-09-01