Silica glass doped with Nd and Al prepared by sol-gel method. Change in the state of aluminium in the formation process

Takeshi Fujiyama, Takushi Yokoyama, Makoto Hori, Minoru Sasaki

研究成果: ジャーナルへの寄稿記事

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To determine the effect of Al2O3 on the homogeneous dispersion of neodymium in a silica glass doped with Al3+ and Nd3+ ions, the coordination states of Al3+ and Nd3+ ions were investigated by UV-VIS absorption spectroscopy and 27Al NMR (solution and solid). In the formation process of a silica glass (2Nd2O36Al2O392SiO2), the states of Al3+ and Nd3+ ions varied continuously. A local structure of Nd3+ ions in the silica glass was stabilized when the dried gel was heated to 300 °C. The symmetry of aluminium tetrahedra was strongly affected by a Nd3+ ion through a bond between neodymium and aluminium. Distortion of the aluminium tetrahedra became large with increase in temperature of heat treatment for the dried gel. It was concluded that the isolation of Nd3+ ions may be stabilized by distortion of the aluminium tetrahedra.

元の言語英語
ページ(範囲)198-203
ページ数6
ジャーナルJournal of Non-Crystalline Solids
135
発行部数2-3
DOI
出版物ステータス出版済み - 1 1 1991

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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