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摘要: 在温度为355～445 ℃、压力为2.0～5.5 GPa条件下，用光谱纯SiO2合成了一系列SiO2玻璃，它们的红外光谱谱带特征与高密度石英玻璃相似。SiO2玻璃和高密度石英玻璃的折光率与压力的对数之间呈线性关系。SiO2玻璃中含有少量的水，并且以OH-离子的形式存在。可能正是由于少量的水对SiO2的非晶化起了重要作用。Abstract: A series of SiO2 glasses are synthesized at 355～445 ℃ and 2.0～5.5 GPa, making use of silica (99.99% purity). The infrared spectra of these SiO2 glasses are similar to that of densified SiO2 glass. The relations between natural logarithm of pressure and index of SiO2 glass or densified SiO2 glass are linear. These SiO2 glasses contain a little water which exists in the form of OH- ion. It is possible that a little water results in amorphization of silica.
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Key words:
- high pressure /
- synthesis /
- SiO2 glass /
- refractive index /
- water
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