Summary
Mechanical mixtures containing zirconia xerogel and increasing amount of crystalline yttria up to 40 mol%, were hydrothermally treated by microwave route at 110°C for 2h. All the treatments were performed in the presence of (KOH+K2CO3) mineralizer solution at concentration 0.2 M. Amorphous and hydrated ZrO2-Y2O3 solid solutions with yttria content up to 33.3 mol% (corresponding to Zr/Y molar ratio equal to 1), resulted after the hydrothermal treatments. A remarkable reduction of the surface area has been detected at increasing yttria content of the amorphous phases with a corresponding increase of the exothermic peak of crystallization. A mechanism of reaction for the formation of the amorphous solid solutions has been proposed.
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Dell’Agli, G., Mascolo, G., Mascolo, M. et al. Microwave-hydrothermal treatment of mechanical mixtures of ZrO2 xerogel and crystalline Y2O3. J Therm Anal Calorim 80, 721–725 (2005). https://doi.org/10.1007/s10973-005-0720-8
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DOI: https://doi.org/10.1007/s10973-005-0720-8