Chemical and thermal stability of phosphate ceramic matrices

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• 作者：L. P. Mezentseva ; A. V. Osipov ; A. A. Akatov…
• 关键词：lanthanum–yttrium orthophosphates ; nanosized powders ; ceramic matrices ; thermal stability ; microhardness ; leaching
• 刊名：Glass Physics and Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：83-90
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Ceramics, Glass, Composites, Natural Materials; Characterization and Evaluation of Materials; Materials Science, general; Physical Chemistry;
• 出版者：Pleiades Publishing
• ISSN：1608-313X
• 卷排序：43

文摘

Nanosized powders of orthophosphates in the LaPO₄–YPO₄–H₂O system have been synthesized by the sol–gel method using the reverse precipitation. The obtained powders served as a base to produce compact ceramic matrices. The matrices’ microhardness has been determined and the dependence of microhardness on the sintering temperature and duration has been established. The dilatometry method was used to study the thermal behavior of ceramic matrix samples and to estimate their thermal expansion coefficient. The stability of La_1–xY_xPO₄ ceramic matrices to leaching in distilled water at room temperature has been determined.