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冷压线
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  cold pressure line
     An Analytical Method for Calculating Cold Pressure Line of Materials by Ultrasonic Data
     超声测量数据计算物质冷压线的一种解析方法
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     Using this method,the cold pressure lines of three materials,including Al,Cu,Ag,are calculated,and the results are compared with 300 K DAC data.
     利用超声测量数据计算了A l、Cu、Ag 3种金属的冷压线,并用DAC原位测量的300 K等温压缩数据对该计算进行了比较.
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     On cold fusion
     核聚变
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     Cold Mountain
    
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     An Analytical Method for Calculating Cold Pressure Line of Materials by Ultrasonic Data
     超声测量数据计算物质压线的一种解析方法
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Based on the anharmonicity of thermal vibration of atoms in a crystal, an equation of state (EOS) in thermal expansion form is proposed to describe the thermodynamic behaviour of a solid at high pressures. Compared with the general Grüniesen equation of state, the new EOS can describe the fact that the isentropic compression curves will approach to the cold compression curve at extremely high pressures. Meanwhile, the EOS can also build up an ideal relationship between high pressure and normal pressure characters...

Based on the anharmonicity of thermal vibration of atoms in a crystal, an equation of state (EOS) in thermal expansion form is proposed to describe the thermodynamic behaviour of a solid at high pressures. Compared with the general Grüniesen equation of state, the new EOS can describe the fact that the isentropic compression curves will approach to the cold compression curve at extremely high pressures. Meanwhile, the EOS can also build up an ideal relationship between high pressure and normal pressure characters of a solid. The theory of this new EOS is introduced and a new thermodynamic function Ω(P) is also defined in this paper. Finally, a method is induced to fit the EOS in thermal expansion form from shock-Hugoniot data.

根据晶体热振动的非谐振效应 ,推导出了一种热膨胀形式的固体物态方程 .与常用的Gr櫣neisen物态方程相比 ,该热膨胀物态方程在理论上说明了极高压下等熵线族趋近于冷压线的事实 ,并可很好地连接固体高压与常压性质 .介绍了该物态方程的理论 ,定义了新的热力学函数 ,并对如何采用冲击Hugoniot方程拟合热膨胀形式的固体物态方程进行了介绍

.In this paper,an analytical method is proposed to calculate the cold pressure line of materials by using the ultrasonic data,which is not relative to the interaction potential of atoms for the time being.The bulk modulus K_(T_0) and its first partial derivative K'_(T_0) to pressure can be obtained from Murnaghan,Birch-Murnaghan,Vinet isothermal equations of state.K_(T_0)and K'_(T_0) are revised to 0 K to get the cold pressure line,and the isothermal compressed data are used to test the applicability of these...

.In this paper,an analytical method is proposed to calculate the cold pressure line of materials by using the ultrasonic data,which is not relative to the interaction potential of atoms for the time being.The bulk modulus K_(T_0) and its first partial derivative K'_(T_0) to pressure can be obtained from Murnaghan,Birch-Murnaghan,Vinet isothermal equations of state.K_(T_0)and K'_(T_0) are revised to 0 K to get the cold pressure line,and the isothermal compressed data are used to test the applicability of these equations of state.Using this method,the cold pressure lines of three materials,including Al,Cu,Ag,are calculated,and the results are compared with 300 K DAC data.

提出了一个利用超声测量数据来计算冷压线的一种解析方法.该方法对冷能和冷压的描述先不考虑原子之间的相互作用势的具体形式,而是直接从Murnaghan、B irch-Murnaghan、V inet等不同解析形式的等温物态方程出发,利用室温较低压力下的超声测量数据计算零压体积模量KT0及其对压力的一阶偏导数KT′0,将其修正到0 K而得到冷压线,并用静高压等温压缩数据检验各种解析物态方程模型的适用性.利用超声测量数据计算了A l、Cu、Ag 3种金属的冷压线,并用DAC原位测量的300 K等温压缩数据对该计算进行了比较.

 
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