Volume 31 No. 6
Nov.  2017
Article Contents


Simultaneous Measurement of Sound Velocity and Temperature of Single Crystal NaCl under Shock Loading

  • Received Date: 2017-07-11
    Accepted Date: 2017-08-07
  • Based on a two-stage light gas gun and a multi-channel time-resolved pyrometer, we simultaneously measured the shock temperatures and sound velocities of B2, B2-liquid and liquid phase NaCl single crystal in the pressure range from 45 GPa to 85 GPa.According to these sound velocities, the shock melting pressure region was determined to be 58-67 GPa, and the shock melting point obtained was 3 740 K at 67 GPa.Furthermore, we calculated the isentropic bulk modulus, the Grüneisen parameter, and the specific heat capacity under constant pressure and compared the experimental results with the previously published data.The Grüneisen parameter calculated by Wuqiang model has an excellent agreement with both the shock compression experiment data in the liquid region and the diamond anvil cell experiment data and the finite strain theory calculation results in the low pressure region.
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