Study on structural relaxation in silica glass

石英玻璃结构弛豫的研究

• 批准号: 09640408
• 负责人: IKUSHIMA Akira J.
• 金额: $ 2.56万
• 依托单位: Toyota Technological Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640408/
• 关键词: structural relaxation; silica glass; glass transition; フォトニクス材料; 光散乱

Investigations of structural relaxation in silica glass are necessary for developing silica glasses with high performances such as ultralow-loss and UV-proof properties. Silica glass is also advantageous for studying on glass transition mechanism because of its simple structure. In this project we tried to measure various properties of silica glasses over a wide-temperature range including the glass transition temperature, and have elucidated structural relaxation processes and their impurity effects as follows :(1)OH or Cl enhances the alpha-relaxation governed by viscous flow, and also generates a sub-relaxational process.(2)he sub-relaxational process is local structural change caused by impurity diffusion.(3)I restrains the alpha -relaxation, contrary to OH and Cl.From these results, we have established controlling the structural relaxation by impurity doping, and developed the following high-functional silica glasses.(1)Na-doped ultralow-loss glass(2)l-doped ultra-heat-proof glass(3)Ultra UV-proof glass created by OH doping, UV-laser irradiation, and thermal annealing

二氧化硅玻璃中结构松弛的研究对于开发具有高性能的二氧化硅玻璃（例如超损坏和防紫外线特性）是必需的。由于其简单的结构，二氧化硅玻璃对于研究玻璃过渡机制也是有利的。在这个项目中，我们试图测量二氧化硅玻璃在广泛的范围内的各种特性，包括玻璃过渡温度，并阐明了结构性放松过程及其杂质效应，如下所示：（1）OH或CL增强了由粘性流动控制的α-浮肿，并由粘性流动，并且还产生了子延伸过程。 the alpha -relaxation, contrary to OH and Cl.From these results, we have established controlling the structural relaxation by impurity doping, and developed the following high-functional silica glasses.(1)Na-doped ultralow-loss glass(2)l-doped ultra-heat-proof glass(3)Ultra UV-proof glass created by OH doping, UV-laser irradiation, and thermal annealing

项目成果

K.Saito: "“Development of a Wide-temperature Range VUV&UV Phospectrometer and Its Applications to Silica Glass"" J.Non-Cryst.Solids,. in print. (1999)

K.Saito：“宽温范围真空紫外和紫外光分光计的开发及其在石英玻璃中的应用”，J.Non-Cryst.Solids，印刷版。

K.Saito, A.J.Ikushima, T.Ito, and A.Itoh: ""A New Method of Developing Ultralow-loss Glasses"" J.Appl.Phys.81. 7129-7134 (1997)

K.Saito、A.J.Ikushima、T.Ito 和 A.Itoh：““开发超低损耗玻璃的新方法””J.Appl.Phys.81。

K.Saito: "“A New Method of Developing Ultralow-loss Glasses"" J.Appl.Phys.81. 7129-7134 (1997)

K.Saito：“开发超低损耗玻璃的新方法”，J.Appl.Phys.81 (1997)。

K.Saito: "“Structural Relaxation of the Frozen-in Density Fluctuations in Silica Glass"" Prog.Theor.Phys.Suppl.126. 277-280 (1997)

K. Saito：“二氧化硅玻璃中冻结密度波动的结构弛豫”，Prog.Theor.Phys.Suppl.126 (1997)。

K.Saito, H.Kakiuchida,and A.J.Ikushima: ""Light Scattering Studies on the Glass Transition and the Structure in Silica Glass"" Jpn.J.Appl.Phys.(in press).

K.Saito、H.Kakiuchida 和 A.J.Ikushima：“二氧化硅玻璃中玻璃转变和结构的光散射研究”Jpn.J.Appl.Phys.（出版中）。