Abstract

The mutual influence of the components in the ZrO₂–Y₂O₃–Al₂O₃ system on the formation of nanocomposites under hydrothermal treatment conditions has been studied. An analysis of the results obtained has shown that the presence of yttrium oxide in nanoparticles based on zirconium dioxide with a fluorite-like structure leads to active recrystallization of c-ZrO₂(YO_1.5) nanocrystals in the ZrO₂(YO_1.5)–AlO_1.5 system under hydrothermal conditions. In this case, yttrium oxide partially passes from ZrO₂(YO_1.5) nanoparticles to an amorphous phase based on aluminum oxide. The most active transfer of yttrium oxide between ZrO₂(YO_1.5) nanoparticles and the amorphous phase is observed in cases where yttrium oxide is partially localized on the surface of c-ZrO₂(YO_1.5) nanocrystals, which is realized at a YO_1.5 content in ZrO₂(YO_1.5) higher than ~27 mol %.

中文翻译：

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ZrO2-Y2O3-Al2O3体系中纳米复合材料的结构及其在水热条件下的形成

摘要

研究了水热处理条件下ZrO ₂ -Y ₂ O ₃ -Al ₂ O _{3体系中各组分对纳米复合材料形成的相互影响。}对所得结果的分析表明，在基于具有类萤石结构的二氧化锆的纳米颗粒中存在氧化钇导致ZrO ₂ (YO _1.5 )-AlO中c -ZrO ₂ (YO _1.5 ) 纳米晶体的活性再结晶_1.5水热条件下的系统。在这种情况下，氧化钇部分从 ZrO ₂ (YO _1.5) 纳米粒子到基于氧化铝的无定形相。在氧化钇部分定位在c -ZrO ₂ (YO _1.5 ) 纳米晶体表面的情况下，观察到在 ZrO ₂ (YO _1.5 ) 纳米颗粒和非晶相之间最活跃的氧化钇转移，这在 YO _1.5处实现ZrO ₂ (YO _1.5 ) 中的含量高于~27 mol%。