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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Sound velocity in alumino-silicate liquids determined up to 2550 K from Brillouin spectroscopy: glass transition and crossover temperatures
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Sound velocity in alumino-silicate liquids determined up to 2550 K from Brillouin spectroscopy: glass transition and crossover temperatures

机译：布里渊光谱法测定高达2550 K的铝硅酸盐液体中的声速：玻璃化转变温度和穿越温度

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摘要

Hypersonic longitudinal sound velocities in five silicate and alumino-silicate liquids have been measured betweeen 293 and 2550K by Brillouin spectroscopy. Together with previous observations for four other glasses and liquids of the system SiO2- Al2O3-CaO-MgO, these results are used to discuss changes in hypersonic velocities in three adjacent temperature domains. i.e., below, in, and above the glass transformation range. The temperature dependence of Brillouin velocities is consistent with the observed variations with temperature of viscosity, density.. and mean heat capacity for the same three temperature domains. These variations of physical properties of alumino-silicate liquids are qualitatively in agreement with the Inherent Structure Theory for liquids. (C) 2004 Elsevier B.V. All rights reserved.
机译：已经通过布里渊光谱法在293和2550K之间测量了五种硅酸盐和铝硅酸盐液体中的高超声速纵向声速。连同先前对SiO2-Al2O3-CaO-MgO系统的其他四种玻璃和液体的观察结果一起，这些结果用于讨论三个相邻温度域中高超声速的变化。即，在玻璃转化范围以下，之上和之上。对于相同的三个温度域，布里渊速度的温度依赖性与所观察到的粘度，密度和平均热容量随温度的变化一致。铝硅酸盐液体的物理性质的这些变化在性质上与液体的固有结构理论一致。 （C）2004 Elsevier B.V.保留所有权利。

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