高压下声速温度系数的一种新算法

龚自正; 华劲松; 经福谦; 谢鸿森; 郭捷

doi:10.11858/gywlxb.2000.04.001

高压下声速温度系数的一种新算法

doi: 10.11858/gywlxb.2000.04.001

1.
西南交通大学高温高压物理研究所，四川成都 610031；
2.
中物院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳 621900；
3.
中国科学院地球化学研究所地球深部物质实验室，贵州贵阳 550002

详细信息

通讯作者:
龚自正

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出版历程
- 收稿日期: 1999-11-22
- 修回日期: 2000-06-09
- 发布日期: 2000-12-05

A Method to Estimate Temperature Coefficient of Sound Velocity at High Pressure

1.
Institute of High Pressure and Temperature Physics, Southwest Jiaotong University, Chengdu 610031, China;
2.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, Mianyang 621900, China;
3.
Material Laboratory of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

More Information

Corresponding author: GONG Zi-Zheng

摘要

摘要: 从声速的定义出发，由热力学基本关系给出了声速温度系数（偏微商）的一种计算方法，以顽火辉石为例，计算结果显示，在40～140 GPa压力范围内，其纵波、剪切波和体波的温度系数随压力的增大而逐渐减小，分别由40 GPa时的-0.386、-0.251、-0.255 m/(sK)降至80 GPa时的-0.298、-0.188、-0.204 m/(sK)，120 GPa时的-0.244、-0.148、-0.175 m/(sK)和140 GPa时的-0.197、-0.131、-0.162 m/(sK)。将这一规律内推至零压得到(dK/dT)0=-0.027 9 GPaK-1，与静高压下的实验值吻合很好。
- 高温高压 /
- 声速 /
- 声速的温度偏微商 /
- 顽火辉石
Abstract: A method to calculate the temperature coefficients of sound velocity at high pressure were given, in terms of the definition of sound velocity and thermodynamics. For perovskite-enstatite, the calculated temperature coefficients of compression, shear and bulk wave velocities decease from 0.386, 0.251, 0.255 m/(s#8226;K) at 40 GPa to 0.298, 0.188, 0.204 m/(s#8226;K) at 80 GPa, 0.244, 0.148, 0.175 m/(s#8226;K) at 120 GPa and 0.197, 0.131, 0.162 m/(s#8226;K) at 140 GPa, respectively. Extrapolating these to zero pressure gives (dK/dT)0=-0.027 9 GPaK-1,which is consistent well with the value from hydrostatic experiment.
- high pressure and high temperature /
- sound velocity /
- temperature coefficient of sound velocity /
- perovskite-enstat

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参考文献(17)

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