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Indexed by:期刊论文

Date of Publication:2002-01-01

Journal:Wuli Xuebao/Acta Physica Sinica

Included Journals:Scopus、PKU、ISTIC

Volume:51

Issue:5

Page Number:1101-1102

ISSN No.:10003290

Abstract: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 Gr  niesen 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   (P) is also defined in this paper. Finally, a method is induced to fit the EOS in thermal expansion form from shock-Hugoniot data.