Abstract

Two approaches to the synthesis of nanosized precursor powders 0.5LaPO₄·nH₂O–0.5ZrO(OH)₂ and 0.5LaPO₄·nH₂O–0.5Y(OH)₃ for the fabrication of ceramic composites 0.5LaPO₄–0.5ZrO₂ and 0.5LaPO₄–0.5Y₂O₃ were used. In the first case, sol-gel synthesis of components (LaPO₄·nH₂O, ZrO(OH)₂ or Y(OH)₃) was carried out separately by reverse precipitation technique. In the second case, reverse precipitation was used too but without separate preparation of sols of the components. The results of the synthesis were compared by XRD analysis, thermal behavior of precursor powders by DSC/TG technique, as well as Vickers microhardness values of 0.5LaPO₄–0.5ZrO₂ and 0.5LaPO₄–0.5Y₂O₃ ceramic composites.

中文翻译：

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正磷酸镧陶瓷复合材料的合成对比研究

摘要

两种合成纳米级前驱体粉末 0.5LaPO ₄ · n H ₂ O–0.5ZrO(OH) ₂和 0.5LaPO ₄ · n H ₂ O–0.5Y(OH) ₃用于制造陶瓷复合材料的方法 0.5LaPO ₄ –使用0.5ZrO ₂和0.5LaPO ₄ –0.5Y ₂ O _{3 。}第一种情况，溶胶-凝胶合成组分（LaPO ₄ · n H ₂ O、ZrO(OH) ₂或 Y(OH) ₃）通过反沉淀技术单独进行。在第二种情况下，也使用了反向沉淀，但没有单独制备各组分的溶胶。_{通过 XRD 分析、DSC/TG 技术对前驱体粉末的热行为以及 0.5LaPO 4} –0.5ZrO ₂和 0.5LaPO ₄ –0.5Y ₂ O ₃陶瓷复合材料的维氏显微硬度值进行比较。