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高温高压条件下液态氧的声速及弹性系数研究

DOI: 10.11858/gywlxb.2008.03.011, PP. 286-290

Keywords: 布里渊散射,高温高压,声速,弹性系数

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Abstract:

采用布里渊散射技术和金刚石对顶砧高压装置,对液态氧进行了高温高压实验研究。入射光采用波长为532nm的单纵模二极管泵浦固体激光源,布里渊光谱由3+3通道法布里-珀罗干涉仪收集。采用电阻丝外加热方法产生高温,用四柱型金刚石对顶砧压机产生高压。分别在背向散射和60°对称散射配置下,研究了温度在298、367和423K下液态氧的声速及弹性系数随压力的变化关系,实验的最高温度和压力为423K、8.9GPa。结果表明,通过实验测量所得到的声速值与理论计算值较接近,并发现在2.3~4.9GPa的压力范围内,温度由298K升高到367K时,弹性系数并没有明显的减小,认为在这个压力范围内,当温度升高时,液氧的体积不膨胀,即基本保持不变。

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