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对固体通用状态方程考虑热效应的Einstein模型进行修正,提出一种利用参考温度下的实验数据计算绝对零度下物质参数的方法,并用于Baonza方程以考虑热效应.结果表明,对于Baonza方程,零温下的参数可以解析地求解出来,常用的热物理量也可以推出解析表达式.将得出的公式用于研究氮化硅α,β和γ相的热物理性质.通过对文献的分析确定了这三种相的方程参数,计算的体积随压强变化和热膨胀系数随温度变化的结果与实验数据符合很好.
The Einstein model considering the generalized equation of state for the heat effect is modified, and a method for calculating the material parameters at absolute zero by using the experimental data at the reference temperature is proposed and used in the Baonza equation to consider the thermal effect. The results show that for the Baonza equation, Of the parameters can be analytically solved, the common thermophysical quantities can also be introduced analytic expressions will be used to study the formula for the silicon nitride α, β and γ thermophysical properties. Through the literature to determine the three The equation parameters of the phase, the calculated volume with pressure and the coefficient of thermal expansion with temperature changes with the experimental data in good agreement.