Abstract

Nanosized precursor powders of (1 – x)ZrSiO₄‒xZrO(OH)₂ are synthesized by the sol-gel method with the separate precipitation of components to obtain (1 – x)ZrSiO₄‒xZrO₂ ceramic composites. The thermal behavior of precursor powders is studied by differential scanning calorimetry and thermogravimetry (DSC/TG). Ceramic composites with a high level of microhardness are obtained by sintering powders, preliminarily calcined at 850°C, in air in the temperature range 1000‒1300°C. In the future, such ceramic composites can be used as matrices for solidification and isolating high-level waste (HLW).

中文翻译：

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溶胶-凝胶法合成纳米粉体并获得锆英石和氧化锆基陶瓷复合材料

摘要

采用溶胶-凝胶法，组分单独沉淀合成(1 – x )ZrSiO ₄ – x ZrO(OH) _{2纳米前驱体粉末，得到(1 –} x )ZrSiO ₄ – x ZrO ₂陶瓷复合材料。通过差示扫描量热法和热重分析法（DSC/TG）研究了前驱体粉末的热行为。具有高显微硬度的陶瓷复合材料是通过在 850°C 下预烧的粉末在 1000-1300°C 温度范围的空气中烧结而获得的。未来，这种陶瓷复合材料可以用作固化和隔离高放废物（HLW）的基质。