On Application of Burton-Prim-Slichter Equation in Calculations of Evaporation Refining

Abstract

Using examples of substances with a simple base (Sb, Yb, Mg, Eu, Te, Zn, Cd, Be), the application of the Burton-Prim-Slichter equation is shown to assess the possibility of evaporative refining of substances by calculations at the values of the parameter δ/D, known from the study of crystallization (δ is the thickness of the surface layer in the evaporated material, D is the diffusion coefficient of the impurity). Calculations of β/β₀ were performed for the indicated substances at melting points. (β and β₀ are the effective and equilibrium separation coefficients.)