Feasibility Assessment for Leucosapphire Production from Aluminum Oxide Prepared Electrochemically

Resumo

Technology was developed to produce high-purity Al₂O₃, the raw material for manufacturing leucosapphire, which is widely used in metallurgical processes, by electrochemical oxidation of aluminum. The optimum conditions and parameters for the electrochemical process; chemical, granulometric, and phase compositions; and size and shape of the obtained Al₂O₃ particles are reported. The high-purity Al₂O₃ could be used in principle to grow leucosapphire crystals by the Verneuil method, horizontal unidirectional crystallization (HUC), and zone refining.