Abstract
The viscosity of ZnCl2-AlkCl binary systems has been accurately measured by means of the rotating cylinder method within the temperature range 260 to 560°C. The results obtained are summarized as follows:(1) The viscosity of pure molten ZnCl2 exibits the non-Arrhenius behavior which can be divided into three stages within a temperature range from 320 to 560°C. The two stages on the high temperature side exibit an almost complete Arrhenius behavior. The constituent species corresponding to each stage have been estimated from the experimental results of this investigation and from those obtained by other authors.(2) With the addition of alkali chlorides having the ionic character to pure molten ZnCl2, the viscosity and the apparent activation energy for viscous flow decrease drastically. This rate of decrease increases according to the following sequence: LiCl<NaCl<KCl<CsCl. However, the differences in the behavior of these systems are reduced as the concentration of alkali chloride is increased or as the temperature increased.
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