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.

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