摘要
在对Grüneisen系数高温高压下演化特性不作任何假设的前提下,建立了一种不依赖于等温物态方程具体形式,通过Hugoniot实验数据直接确定0K零压等温体积模量B0K及其对压力的一阶导数B′0K和初始密度ρ0K等0K物态方程输入参数的方法。通过与实验和理论数据的分析和比较,表明用这一方法确定的B0K和B′0K不仅合理,而且具有很高的精度,特别是B′0K的精度,要优于目前传统超声实验的测量精度。此外,这一方法所确定的ρ0K不仅在Gr櫣neisen物态方程的框架内与相应的室温零压特性参数相适配,而且与低温热膨胀实验数据所确定的近0K初始密度ρ0E非常吻合。
A method that is independent of the concrete forms of the isothermal equation of state is proposed to accurately determine the input parameters, which are the isothermal bulk modulus B0K, its first pressure derivative B'0KK ANd the specific density ρ0K at zero pressure and 0 K temperature, directly from the experimental Hugoniot data and without any assumption on the behavior of Gruneisen parameter at high pressures and temperatures. Comparisons of these data with ultrasonic experiments demonstrate that the values of B'0K, B'0K and ρ0K calculated from this method are rational and of better precision.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2005年第2期97-104,共8页
Chinese Journal of High Pressure Physics
