A method for the synthesis of metal oxide precursors based on the electrogeneration of reagents in a coaxial electrochemical reactor without a membrane with electrodes substantially different in the surface area was proposed. The electrogeneration is accompanied by the subsequent hydrolysis of the products, the formation of primary particles due to the polycondensation of aquahydroxo complexes, and their further enlargement. In the coaxial electrolyzer-reactor, the flow of gas and electrolyte bubbles moves up and to the sides from the central electrode to form a vortex in the confined space. This makes it possible to distribute the components of the reaction mixture and to suspend more uniformly the formed particles of the solid phase in the liquid bulk due to the appeared turbulence. The introduction of Zr4+, Mg2+, and La3+ ions favors the formation of stable positively charged particles. The average particle size of alumina modified with oxides of other metals (Zr, Mg, and La) obtained using electrogenerated reagents was found to be 20-50 nm. Under thermal treatment of the synthesized systems (1100°C), complex phase transformations lead to the formation of spinel Al2MgO4 and stabilization of α-Al2O3 and tetragonal t-ZrO2 stable at high temperatures up to 1600°C

中文翻译：

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使用电生试剂合成 Al2O3-ZrO2-MxOy (M = Mg, La) 复合氧化物体系及其理化性质

提出了一种合成金属氧化物前体的方法，该方法基于在同轴电化学反应器中电产生试剂，该反应器没有具有表面积显着不同的电极的膜。发电伴随着产物的后续水解、由于水合羟基复合物的缩聚而形成初级粒子以及它们的进一步增大。在同轴电解反应器中，气体和电解液气泡流从中心电极向上和向两侧移动，在密闭空间中形成涡流。这使得可以分布反应混合物的组分并且由于出现的湍流而使形成的固相颗粒更均匀地悬浮在液体本体中。Zr4+、Mg2+、La3+ 离子有利于形成稳定的带正电粒子。发现使用电生成试剂获得的用其他金属（Zr、Mg 和 La）的氧化物改性的氧化铝的平均粒径为 20-50 nm。在合成系统的热处理 (1100°C) 下，复杂的相变导致尖晶石 Al2MgO4 的形成和稳定的 α-Al2O3 和四方 t-ZrO2 在高达 1600°C 的高温下稳定