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Chinese Journal of High Pressure Physics  > 2000  >  14(4): 241-246 .
GONG Zi-Zheng, HUA Jing-Song, JING Fu-Qian, XIE Hong-Sen, GUO Jie. A Method to Estimate Temperature Coefficient of Sound Velocity at High Pressure[J]. Chinese Journal of High Pressure Physics, 2000, 14(4): 241-246 . doi: 10.11858/gywlxb.2000.04.001
Citation: GONG Zi-Zheng, HUA Jing-Song, JING Fu-Qian, XIE Hong-Sen, GUO Jie. A Method to Estimate Temperature Coefficient of Sound Velocity at High Pressure[J]. Chinese Journal of High Pressure Physics, 2000, 14(4): 241-246 . doi: 10.11858/gywlxb.2000.04.001
shu

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

doi: 10.11858/gywlxb.2000.04.001
  • 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

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  • Corresponding author: GONG Zi-Zheng
  • Received Date: 22 Nov 1999
  • Rev Recd Date: 09 Jun 2000
  • Publish Date: 05 Dec 2000
    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.

     

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