Abstract—

We consider sublimation in M–X (M = Mg, Cr, Sm, Eu; X = impurity with a preset activation energy for diffusion) model systems, for which the Peclet number Ре = wr/(ρD) (where D is the diffusion coefficient, w is the mass vaporization rate, ρ is the density of the substance, and r is a size factor) is calculated as a function of temperature by a semiempirical method. The Pe(T) temperature dependence is shown to exhibit complex behavior. Knowledge of the Peclet number as a function of temperature allows one to use it for calculating sublimation refining of a substance in the case of an impurity with a given separation factor and get an idea of how the sublimation refining process depends on temperature.

中文翻译：

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一些简单物质升华过程中扩散佩克莱数的温度依赖性

摘要-

我们考虑 M–X（M = Mg、Cr、Sm、Eu；X = 具有预设扩散激活能的杂质）模型系统中的升华，其中 Peclet 数Ре = wr /(ρ D )（其中D是扩散系数，w是质量蒸发率，ρ 是物质的密度，r是尺寸因子）通过半经验方法计算为温度的函数。该Pe的（ŧ) 温度依赖性表现出复杂的行为。Peclet 数作为温度函数的知识允许人们使用它来计算在具有给定分离因子的杂质的情况下物质的升华精炼，并了解升华精炼过程如何取决于温度。