Correlation Between Viscosity and Electrical Conductivity of Aluminosilicate Melts

Abstract

The linear relations between logarithm of viscosity and logarithm of electrical conductivity deduced in our previous paper for MO-SiO₂ (M = Mg, Ca, Sr, Ba) and M₂O-SiO₂ (Li, Na, K) melts are extended in this study. It is found that the linear law for MO-SiO₂ system is also followed for the melts of FeO-SiO₂ and MnO-SiO₂ (when electronic conduct can be neglected relative to ionic conduct). The relation between viscosity and electrical conductivity is mainly dependent on the valences of cations of basic oxides. For the $\sum {{\text{M}}_{x} {\text{O-SiO}}_{2} }$ melt containing several basic oxides, there are two situations: In the case where all cations are divalent (or univalent), the relation is the same as that of MO-SiO₂ melt (or M₂O-SiO₂ melt); in the case of existing both divalent and univalent cations, the coefficients for the linear relation can be calculated based on the coefficients of MO-SiO₂ and M₂O-SiO₂ melts, with the weight factors from the renormalized mole fractions of $\sum {\text{MO}}$ and $\sum {{\text{M}}_{ 2} {\text{O}}}$. It is also found that Al₂O₃ has little effect on the relation, and the law for $\sum {{\text{M}}_{\text{x}} {\text{O-SiO}}_{ 2} }$ melt can be approximately applied to $\sum {{\text{M}}_{\text{x}} {\text{O-Al}}_{ 2} {\text{O}}_{ 3} {\text{-SiO}}_{ 2} }$ melt.