Sol-Gel Synthesis of Nano-Sized Powders and Fabrication of Ceramic Composites Based on Zircon and Hafnium Oxide

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发表日期：

2024年6月1日

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V. L. Ugolkov,
N. A. Koval’chuk,
A. V. Osipov,
L. P. Mezentseva

摘要

Abstract

Nanosized (1 – x)ZrSiO₄–xHf(OH)₄ precursor powders are synthesized using the sol-gel method with the separate precipitation of components for obtaining (1 – x)ZrSiO₄–xHfO₂ ceramic composites. The thermal behavior of the precursor powders is studied using the differential scanning calorimetry and thermogravimetry (DSC/TG) method. By sintering powders precalcined at 850°C in air in the temperature range of 1000–1300°C, ceramic composites with high microhardness are obtained. The phase composition is determined by the XPA method.