Synthesis of Precursors of Complex Oxide Systems Al2O3–ZrO2–MxOy (M = La, Y, Ce) Using Electrogenerated Reagents and Their Physical and Chemical Properties

Abstract

The scientific bases for the synthesis of precursors of nanostructured Al₂O₃–ZrO₂–M_xO_y (M = La, Y, Ce) oxide systems are developed. The features of the formation of precursors of such systems under conditions of rapid mixing of electrically generated reagents, implemented in a diaphragmless coaxial electrolyzer reactor, are studied. Using the methods of potentiodynamic polarization curves, X-ray diffractometry, X-ray fluorescence, synchronous thermal analysis, and laser diffraction, the anodic processes occurring in the electrolyzer and the morphology of particles formed in solution and transformed during heat treatment, as well as the phase, granulometric, and elemental compositions of precursors and oxide systems, are studied. The proposed approach makes it possible to obtain oxide systems modified with rare earth elements based on the Al₂O₃–ZrO₂ binary system, characterized by the presence of a tetragonal zirconium dioxide phase in them.