Abstract
Abstract The kinetics of the transition of anatase to rutile have been studied in the temperature range 750∼800°C by means of dielectric constant measurements. The kinetic data can be fitted reasonably well by the first order equation. The transition rate is significantly affected by the heating atmosphere and the flux, and the values of the activation energy show a significantly large difference in these cases. In an air or oxygen atmosphere the value of the activation energy in the transition of pure titanium dioxide is 110 or 116 kcal./mol. and 90 kcal./mol. respectively. When 1% of lithium chloride is added to the titanium dioxide, the value of the activation energy of the transition is 150 kcal./mol.
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