提出了一种基于零阶Bragg-Williams近似的新统计热力学模型。新模型的独特之处在于引入了表观压缩系数α来校正高压气体的体积变化，并且在拟合结果中获得无环状曲线。然后，新模型成功应用于金属粉末的吸氢过程。所有结果表明这个新模型运行很好，特别是新模型可用于预测不同温度下的PCT曲线。因此，我们的新模型可以在实际系统中应用。 Based on zero-order Bragg-Williams approximation, a new statistic thermodynamic model is presented herein. The distinctive feature of the new model is that an apparent compressibility factor α is introduced to correct the volume change of high-pressure gases and ensure no loop-like curves are obtained in the fitting results. The new model is successfully applied to investigate hydrogen absorption on metal powders. Our results indicate that the model works very well and can be used to predict PCT curves at different temperatures. Hence, our new model exhibits significant potential for application in practical systems
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