Abstract
Spinodal decomposition in ionic solid solutions of the form AX-BX where A and B are cations and X is the anion is examined along similar lines as proposed by Cahn. Assuming anions to be immobile, electrostatic energy arising due to the differences in cationic mobilities is determined. This electrostatic energy is shown to retard the kinetics of spinodal decomposition. The role of aliovalent dopants on the kinetics of decomposition is also examined. Subsequently, the probable role of aluminum on spinodal decomposition in the system TiO2-SnO2 is assessed.
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