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Phenomenological Study of Equations of State and Melting Law at High Pressure for Solids

Author: ZouYong
Tutor: ChenLi
School: Anhui Normal University
Course: Atomic and Molecular Physics
Keywords: solid high temperatures-high pressures equation of state melting law
CLC: O482
Type: Master's thesis
Year: 2006
Downloads: 176
Quote: 0
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Abstract


The theories of equation of state (EOS), in a broad sense, are on the thermodynamic properties of a substance system. In a narrow sense, EOS is on the relationship P=P(V,T) among the pressure P, the volume V and the temperature T of a substance system in thermodynamic equilibrium. With wide applications in actual life and in the production of solid materials, the study of EOS on solids is a very important part of the fields of many basic and application sciences such as thermodynamics, statistical physics, physics of condensed matter, atomic and molecular physics, geophysics, planetary science, chemical physics, etc. Meanwhile, the melting of solids at high temperature is a commonly observed phenomenon in nature, which has been continually investigated for a long time. In this paper, a systematic study of EOS and melting law for solids at high temperatures-high pressures has been made by using phenomenological method.In the preface, a brief introduction has been made as to the origins, the purposes and the conditional scopes of this work. The history of EOS study and its applications in other subjects, the theory of melting and its investigation at present have also been introduced. The methods and measures used in the paper as well as its theoretical meanings and practical values have also been included in this part.The first chapter provides the basic knowledge for solids, including their structures and basic properties, and some often-used thermodynamic parameters in the study of EOS. In the second chapter, we first introduced the summary of basic theories of EOS for solids. The general expression of EOS of solids E=Ec+En and P=Pc+Pn are given in the view of solid-state theory. That is, the energies and pressures of the solid substance system can be sorted into cold ones and thermal ones--cold energies (or pressures) and thermal energies (or

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