Liquid-Phase Synthesis and Investigation of Powders Based on Zirconium Dioxide

Resumo

Xerogels in the ZrO₂(Y₂O₃)–Al₂O₃ system are obtained by the coprecipitation method followed by a low-temperature treatment at –25°C for 24 h. The physicochemical properties of the powders of ZrO₂(Y₂O₃)–xAl₂O₃ (х = 15, 20, and 25 mol %) compositions obtained by burning the xerogels are studied. It is shown that the introduction of 25 mol % of Al₂O₃ promotes the deceleration of the growth of the particles of the t-ZrO₂(Y₂O₃) tetragonal solid solution. It is established that the obtained powders are characterized by high values of the degree of tetragonality (c/a = 1.438–1.436).