高温高压条件下液态氧的声速及弹性系数研究

李敏; 崔启良; 李芳菲; 周强; 武晓鑫; 邹广田

doi:10.11858/gywlxb.2008.03.011

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

1.
吉林大学超硬材料国家重点实验室，吉林长春 130012；
2.
吉林大学材料科学与工程学院，吉林长春 130012

详细信息

通讯作者:
周强

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出版历程
- 收稿日期: 2007-09-19
- 修回日期: 2007-11-21
- 发布日期: 2008-09-05

The Velocity and Elastic Constants in Fluid Oxygen under High Pressures and High Temperature

1.
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
2.
School of Materials Science and Engineering, Jilin University, Changchun, 130012, China

More Information

Corresponding author: ZHOU Qiang

摘要

摘要: 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532 nm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423 K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423 K、8.9 GPa。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2.3~4.9 GPa的压力范围内，温度由298 K升高到367 K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。
- 布里渊散射 /
- 高温高压 /
- 声速 /
- 弹性系数
Abstract: We applied the Brillouin scattering and diamond-anvil cell (DAC) technique to study the liquid oxygen at high pressure and high temperature. The singlefrequency green (532 nm) laser was used as Brillouin excitation source, and the Brillouin spectra were collected by a newly developed 3+3 pass tandem Fabry-Perot interferometer. The sample was loaded into a modified Merrill-Bassett-type four-screw DAC and heated externally by a resistance heater. The backscattering and 60 scattering geometries were used simultaneously. In this paper, we presented the pressure dependences of sound velocities of liquid oxygen under high pressure and high temperature, and the results were consistent with those predicated by theoretical calculations. The elastic constants of liquid oxygen were determined under high pressure and high temperature, we suspected that the volume of liquid oxygen doesn't expend with temperature under the pressure range from 2.3 GPa to 4.9 GPa.
- Brillouin scattering /
- high temperature and high pressure /
- acoustic velocities /
- elastic constants

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参考文献(18)

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