...Classifications of Solid-State Phase Transformation 根据相变时热力学函数的变化：一级相变（First Order Phase Transition）： 相变时有体积变化及相变潜热释放的固态相变 物态变化及同素异构二级相变（Second Order PhaseTransition） ：相变时无体积变化...
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?一级相改变
... first law of thermodynamics 热力学第必然律 first order phase transition一级相改变 first point of aries 春分点 ...
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?第一级相转变
first order phase transition 第一级相变; 第一级相转变; 一级相转变 first-order phase transition 第一级相变; 一级相转变 .
They discovered a firstorderphasetransition, a discontinuity, in liquid hydrogen between a molecular state with low conductivity and a highly conductive atomic state.
他们发现了一个不连续的一级相变，这个相变是在液态氢低电导率的分子态和高电导率的原子态之间。
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For smaller clusters, there is no clear characteristic of first-orderphasetransition during the melting, implying a coexistence of solid and liquid phases due to finite-size effect.
对于较小的团簇，融化曲线没有出现清楚的一级相变特征，意味着由于尺寸效应导致的固态液态共存。
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The results show that the laser process in different conditions possesses the characteristics of the firstorder or the second order phasetransition. Laser is a typical non-equilibrium phenomenon.