Thermodynamic properties of dilute aluminum in liquid zinc

The thermodynamic properties of the liquid zinc-aluminum system in the range of 0 to 0.36 mole fraction of aluminum and over a temperature range of 430 to 530 degreesC were investigated by using an electromotive force (EMF) cell of the type Al(s)\LiCl - KCl - AlCl3\Zn - Al(1),Mo The activity of aluminum was found to show a significant positive deviation from Raoultian behaviour The activity coefficient of aluminum in the dilute solution range (gamma (0)) and the free energy of solution of aluminum based on the one weight percent (1 wt %) standard state were determined as a function of temperature and found to follow the relationships: log gamma0 = 1195/T - 0.874 DeltaG(s) = 5457 - 11.4T (cal/mole) Over the temperature range investigated, the self-interaction coefficient of aluminum in liquid zinc (e(Al)(Al)) was found to be approximately constant at -0.01.