Synthesis of Highly Dispersed Al2O3–ZrO2–MgO Materials Using Electrogenerated Reagents

Abstract

We have studied the morphology and phase composition of precursors for the preparation of highly dispersed alumina-based Al₂O₃–ZrO₂–MgO materials. The precursors were synthesized in a coaxial diaphragmless electrolyzer with a soluble anode. Zr(IV) and Mg(II) ions were added during the synthesis process. It has been shown that varying electrolysis conditions allows the particle size and phase composition of the precipitate to be controlled. Synthesis in the Al₂O₃–ZrO₂–MgO system is accompanied by Al₂MgO₄ spinel formation. Increasing the spinel concentration helps the metastable phase θ-Al₂O₃ to persist.